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+benchmark/IEO/pdfs/AR_2026.pdf filter=lfs diff=lfs merge=lfs -text
+benchmark/NYU_CTF_Bench/test/2022/CSAW-Quals/rev/AnyaGacha/src/client/Library/Artifacts/07/07a25769e4683136426e383407b29b29 filter=lfs diff=lfs merge=lfs -text

benchmark/IEO/pdfs/AR_2026.pdf

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+size 526881

benchmark/IOAI/IOAI-2025/At-Home-Round/Radar/validation_set/364.mat.pt

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benchmark/IOAI/IOAI-2025/At-Home-Round/Radar/validation_set/365.mat.pt

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benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_endgame.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_endgame.html/endgame.html

@@ -0,0 +1,44 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Endgame</H3>
+
+  </h2></td>
+  <a href="index.html">Back to hunt</a>
+  </td></tr></table>
+
+<blockquote><i>
+After solving all of the metapuzzles, a team would receive the
+endgame puzzle:
+</blockquote></i>
+
+<PRE>
+In the following code, each letter stands for a digit, and each three
+digit number represents a letter from one of the puzzle solutions from
+earlier in the hunt. For example, 352 would be the 2nd letter of
+Puzzle 3.5. Good luck... your goal may be just around the corner...
+
+  ARA ULT TAR ETA RLS AMU TUR ESS
+  UEA RMT UAU ALA
+  TSA UUU ELM UMU
+  RRR TTT AAA EEE
+  TEA UTE ERT TRR ABM AER RSR
+  ASU REE TBM USR EAB TMA RTU EUT
+</PRE>
+
+<A HREF="endgame_solution.html">Endgame Solution</A>
+
+</BODY>
+<script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_endgame.html/endgame_solution.html

@@ -0,0 +1,63 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Endgame (Solution)</H3>
+
+  </h2></td>
+  <a href="index.html">Back to hunt</a>
+  </td></tr></table>
+
+<PRE>
+Author: Dan Katz
+
+  ARA ULT TAR ETA RLS AMU TUR ESS
+  UEA RMT UAU ALA
+  TSA UUU ELM UMU
+  RRR TTT AAA EEE
+  TEA UTE ERT TRR ABM AER RSR
+  ASU REE TBM USR EAB TMA RTU EUT
+
+A=1
+T=2
+U=3
+E=4
+R=5
+M=6
+S=7
+L=8
+B=9
+
+ A   P   P   R   O   A   C   H
+151 328 215 421 587 163 235 477
+
+ R   O   O   M
+341 562 313 181
+
+ B   A   U   M
+271 333 486 363
+
+ C   O   I   N
+555 222 111 444
+
+ B   E   N   E   A   T   H
+241 324 452 255 196 145 575
+
+ G   R   E   E   N   E   R   Y
+173 544 296 375 419 261 523 432
+
+Iterating the cipher once more, BAUM = 9-136
+</PRE>
+
+</BODY>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_endgame.html/index.html

@@ -0,0 +1,111 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>2000 Mystery Hunt · MIT Mystery Hunt / Puzzle Club</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=PT+Serif:ital,wght@0,400;0,700;1,400&family=Syncopate:wght@700&display=swap"
+      rel="stylesheet"
+    />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="/style.css" type="text/css" />
+    <meta
+      name="description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+    <meta property="og:image" content="/images/header-coin.png" />
+    <meta
+      property="og:description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+  </head>
+  <body>
+    <div id="header"></div>
+    <main id="main">
+
+<h1><a href="../huntsbyyear.html">Archives</a> / 2000 Mystery Hunt </h1>
+
+<h3>Description</h3>
+<p> The 2000 Mystery Hunt was based on <em>Wizard of Oz</em> and asked teams to help guide Dorothy back
+home using the Tornado-Operated Object Levitator (T.O.O.L.), which required a coin for its operation.</p>
+<p> The coin was found at 2:18am on Sunday by Paintttniap, in a planter outside 9-136.</p>
+
+<h3>Credits</h3>
+The 2000 Mystery Hunt was written by Roger Barkan, Jennifer Berk, Jamie Coffin, Jed Goldstone, Heather Handley, Ann Jones, Ray Jones, Dan Katz, Kiran Kedlaya, Rose Koch, Brian Litofsky, Christopher Long, Catherine Moore, Chris Morse (Captain), Darren Rigby, Dave Savitt, and Brian Tivol.
+
+<h3>The Hunt Introduction</h3>
+
+<p>Welcome to MH2K! (That's Mystery Hunt 2000 for those of you
+are acronymatically challenged.)  This year, your puzzle-solving
+skills are sorely needed in order to help our hero, Dorothy Gale,
+return to her monochromatic homeland.</p>
+
+<p>The Munchkin Information Processing Board (MIPB) has offered
+to help Dorothy get home through the use of their newly designed
+Tornado-Operated Object Levitator (T.O.O.L.) Unfortunately, as a
+consequence of inventive eccentricity, the T.O.O.L. can only be
+operated with a special coin, and nobody on MIPB can remember where
+they left it. Your goal is to recover this coin.</p>
+
+<p>Fortuitously, you have a powerful computer system to aid you
+in your search. MIPB possesses a highly advanced network
+affectionately known as the Wonderfully Intelligent Zenith of All
+Recovery Devices (W.I.Z.A.R.D.)  that should be able to scan the
+campus and trace the location of the coin.  However, Wendy the
+Insidiously Tyrannical Computer Hacker (W.I.T.C.H.) has installed a
+series of password blocks into W.I.Z.A.R.D. and no one knows how to
+access its higher functions.</p>
+
+<p>It is known that W.I.T.C.H. has a careless habit of inadvertently
+leaving clues to her passwords around the MIT campus. Rather than make
+you look for them, Dorothy has graciously volunteered to brave the
+wild jungles of MIT in search of W.I.T.C.H.'s trail of devious
+puzzles, taking a pocket W.I.Z.A.R.D. terminal with her that will
+automatically record her adventures and post them online.  Some of her
+adventures may bring her into contact with some familiar faces; it
+seems she's not the only one who had a recent run-in with a
+tornado....</p>
+
+<p>You, the remote solving team, must solve W.I.T.C.H.'s puzzles, and
+extract from them a username and password, which will grant you access
+to the appropriate puzzles to deduce the second username and password,
+and so forth. Stay in contact with MIPB regarding your progress; they
+are working together with you to discover the coin, and they'll be
+glad to TRY to help you if you have questions.</p>
+
+<p>Good luck, keep your wits about you, and remember: There's no
+place like hell.</p>
+
+<h3>The Hunt and Solutions (linked)</h3>
+<ul>
+  <li><a href="set1">Puzzle Set 1</a></li>
+  <li><a href="set2">Puzzle Set 2</a></li>
+	<li><a href="set3">Puzzle Set 3</a></li>
+	<li><a href="set4">Puzzle Set 4</a></li>
+	<li><a href="set5">Puzzle Set 5</a></li>
+  <li><a href="endgame.html">Endgame</a></li>
+</ul>
+
+<h3>Photos</h3>
+<p>The photos below were accompanied by the following announcement: <em>Insidious news! Bitter about the coin they lost last year, Carmen and her gang have caught up with Dorothy and are preparing to exact a cruel revenge. Film at 11. </em></p>
+
+<div class="photowithlabel">
+<img src="vilepics/dorothy.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothycarmen.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothydan.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothyvile.jpg" class="photoframe"><br><br>
+</div>
+
+    </main>
+    <div id="footer"></div>
+  </body>
+  <script type="module" src="/package.js"></script>
+  <script type="module" src="/Header.js"></script>
+  <script type="module" src="/Nav.js"></script>
+  <script type="module" src="/Title.js"></script>
+  <script type="module" src="/Toggle.js"></script>
+  <script type="module" src="/Footer.js"></script>
+  <script type="module" src="/main.js"></script>
+</html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1/Puzzle.html

@@ -0,0 +1,70 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Puzzle 1.9
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<!-- XXX Edit this part here -->
+1.9: Oh, to be in DC
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+
+Dorothy went to see a W.I.Z.A.R.D. system administrator for some help getting into
+the system, only to find the
+following note posted on her door: <p>
+
+<blockquote>
+I'm on vacation this month. My itinerary is below; if you need to
+get in touch with me, the standard people in each country will
+have my address.<BR>
+</blockquote>
+
+  </i></blockquote>
+
+  <pre>
+
+TW 96 Friday, Jan 7 7:00 AM - 11:52 AM
+LI 311 Friday, Jan 7 1:45 PM - 2:20 PM
+LI 351 Friday, Jan 7 3:50 PM - 4:25 PM
+
+Lodging: Seaview Hotel
+
+IW 343  Wednesday, Jan 12 3:35 PM - Thursday, Jan 13 6:50 AM
+TK 1828 Thursday, Jan 13 4:05 PM - Thursday, Jan 13 8:30 PM
+TK 1386 Thursday, Jan 13 10:45 PM - Friday, Jan 14 3:05 AM
+
+Lodging: Hotel Victoria
+
+SR 3495 Sunday, Jan 16. 4:40 AM - 6:10 AM
+TG 971 Sunday, Jan 16. 1:30 PM - 6:10 AM
+TG 690 Monday, Jan 17  8:20 AM - 9:30 AM
+
+Lodging: Belvedere Hotel
+
+VN 820 Thursday, Jan 20 12:30 PM - 1:40 PM
+VN 924 Thursday, Jan 20 3:00 PM - 7:15 PM
+AA 7408 Thursday, Jan 20 11:30 PM - 6:15PM
+AA 198 Thursday, Jan 20 10:00 PM - Friday, Jan 21 6:34 AM
+
+
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1/Solution.html

@@ -0,0 +1,59 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Set 1 Metapuzzle (Solution)
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+
+Set 1 Metapuzzle (Solution)
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+
+
+  <pre>
+Author: Brian Tivol
+
+The answers to the eleven puzzles can be arranged to form two fairly
+long chains:
+
+1.10          EMERGENT
+1.3     	  GENTLE
+1.6     	      LEAN
+1.9     		ANGELA
+1.4     		  GELATIN
+            
+1.8     			 MANAGE
+1.5     			    AGES
+1.7     			       SIGNOR
+1.1     				IGNORANT
+1.2     				     ANTHER
+1.11    					HERALD
+
+TIN MAN would join the two chains together.  EMERALD is what you get
+when you cross out every duplicated letter.  Those two words are our
+username and password for this round.
+
+(This was probably the easiest round for backsolving answers.
+However, one team had noticed the pattern, figured that EMERALD must
+be the password, and tried to backsolve some of the words in the
+middle of the chain.  They determined that the GENTLE and IGNORANT
+must be connected by LEMONS and MONSIGNOR; if that didn't completely
+leave four other words in the cold, it would have been beautiful.)
+  </pre>
+
+  </body>
+  </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1/asset_index.html

@@ -0,0 +1,111 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>2000 Mystery Hunt · MIT Mystery Hunt / Puzzle Club</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=PT+Serif:ital,wght@0,400;0,700;1,400&family=Syncopate:wght@700&display=swap"
+      rel="stylesheet"
+    />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="/style.css" type="text/css" />
+    <meta
+      name="description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+    <meta property="og:image" content="/images/header-coin.png" />
+    <meta
+      property="og:description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+  </head>
+  <body>
+    <div id="header"></div>
+    <main id="main">
+
+<h1><a href="../huntsbyyear.html">Archives</a> / 2000 Mystery Hunt </h1>
+
+<h3>Description</h3>
+<p> The 2000 Mystery Hunt was based on <em>Wizard of Oz</em> and asked teams to help guide Dorothy back
+home using the Tornado-Operated Object Levitator (T.O.O.L.), which required a coin for its operation.</p>
+<p> The coin was found at 2:18am on Sunday by Paintttniap, in a planter outside 9-136.</p>
+
+<h3>Credits</h3>
+The 2000 Mystery Hunt was written by Roger Barkan, Jennifer Berk, Jamie Coffin, Jed Goldstone, Heather Handley, Ann Jones, Ray Jones, Dan Katz, Kiran Kedlaya, Rose Koch, Brian Litofsky, Christopher Long, Catherine Moore, Chris Morse (Captain), Darren Rigby, Dave Savitt, and Brian Tivol.
+
+<h3>The Hunt Introduction</h3>
+
+<p>Welcome to MH2K! (That's Mystery Hunt 2000 for those of you
+are acronymatically challenged.)  This year, your puzzle-solving
+skills are sorely needed in order to help our hero, Dorothy Gale,
+return to her monochromatic homeland.</p>
+
+<p>The Munchkin Information Processing Board (MIPB) has offered
+to help Dorothy get home through the use of their newly designed
+Tornado-Operated Object Levitator (T.O.O.L.) Unfortunately, as a
+consequence of inventive eccentricity, the T.O.O.L. can only be
+operated with a special coin, and nobody on MIPB can remember where
+they left it. Your goal is to recover this coin.</p>
+
+<p>Fortuitously, you have a powerful computer system to aid you
+in your search. MIPB possesses a highly advanced network
+affectionately known as the Wonderfully Intelligent Zenith of All
+Recovery Devices (W.I.Z.A.R.D.)  that should be able to scan the
+campus and trace the location of the coin.  However, Wendy the
+Insidiously Tyrannical Computer Hacker (W.I.T.C.H.) has installed a
+series of password blocks into W.I.Z.A.R.D. and no one knows how to
+access its higher functions.</p>
+
+<p>It is known that W.I.T.C.H. has a careless habit of inadvertently
+leaving clues to her passwords around the MIT campus. Rather than make
+you look for them, Dorothy has graciously volunteered to brave the
+wild jungles of MIT in search of W.I.T.C.H.'s trail of devious
+puzzles, taking a pocket W.I.Z.A.R.D. terminal with her that will
+automatically record her adventures and post them online.  Some of her
+adventures may bring her into contact with some familiar faces; it
+seems she's not the only one who had a recent run-in with a
+tornado....</p>
+
+<p>You, the remote solving team, must solve W.I.T.C.H.'s puzzles, and
+extract from them a username and password, which will grant you access
+to the appropriate puzzles to deduce the second username and password,
+and so forth. Stay in contact with MIPB regarding your progress; they
+are working together with you to discover the coin, and they'll be
+glad to TRY to help you if you have questions.</p>
+
+<p>Good luck, keep your wits about you, and remember: There's no
+place like hell.</p>
+
+<h3>The Hunt and Solutions (linked)</h3>
+<ul>
+  <li><a href="set1">Puzzle Set 1</a></li>
+  <li><a href="set2">Puzzle Set 2</a></li>
+	<li><a href="set3">Puzzle Set 3</a></li>
+	<li><a href="set4">Puzzle Set 4</a></li>
+	<li><a href="set5">Puzzle Set 5</a></li>
+  <li><a href="endgame.html">Endgame</a></li>
+</ul>
+
+<h3>Photos</h3>
+<p>The photos below were accompanied by the following announcement: <em>Insidious news! Bitter about the coin they lost last year, Carmen and her gang have caught up with Dorothy and are preparing to exact a cruel revenge. Film at 11. </em></p>
+
+<div class="photowithlabel">
+<img src="vilepics/dorothy.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothycarmen.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothydan.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothyvile.jpg" class="photoframe"><br><br>
+</div>
+
+    </main>
+    <div id="footer"></div>
+  </body>
+  <script type="module" src="/package.js"></script>
+  <script type="module" src="/Header.js"></script>
+  <script type="module" src="/Nav.js"></script>
+  <script type="module" src="/Title.js"></script>
+  <script type="module" src="/Toggle.js"></script>
+  <script type="module" src="/Footer.js"></script>
+  <script type="module" src="/main.js"></script>
+</html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1/hint1.txt

@@ -0,0 +1,9 @@
+HINT 1
+
+VICTOR
+THEODORE
+DAMASCUS
+MARTIN
+ADRIAN
+SOTER
+

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1/solution1.txt

@@ -0,0 +1,15 @@
+HINT 1 Solution
+
+Author: Chris Morse
+
+The names are all of popes.  If you look at the Nth letter of their
+name, where N is the number of the last pope to use that name:
+
+VICTOR III
+THEODORE II
+DAMASCUS II
+MARTIN V
+ADRIAN VI
+SOTER I
+
+you get the answer CHAINS

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1/survey.txt

@@ -0,0 +1,40 @@
+
+We hope you aren't tired of answering our questions, but there is one
+last set we'd like you to try out.  Your comments will help future
+Hunts from succumbing to our pitfalls and possibly give us a warm
+fuzzy feeling inside.  You can answer either as teams or individuals,
+as you see fit.
+
+1. What is your team's name?
+
+2. How many years has your team competed in the Mystery Hunt?  How
+   many full-time solvers and how many come-and-go solvers were on
+   your team?
+
+3. What are your overall impressions of this year's Hunt?
+
+4. Do you feel as if you'd want to return next year?
+
+5. Did you feel there were any administrative or logistical problems
+   this year that future organizers could be warned about?
+
+6. Is there a specific member of MIPB you'd like to send a message to?
+   Is there a specific puzzle whose creator you'd like to send a
+   message to?
+
+7. Which puzzles did you find to be...
+      ...the most enjoyable?
+      ...the least enjoyable?
+      ...(in)elegant?
+      ...(un)memorable?
+      ...conducive to silly quotes?
+   (Feel free to list more than one for each category; extra comments
+   appreciated.)
+
+8. What sorts of comments worthy of preservation and ridicule did your
+   team members blurt out?  Do you have any comic stories worth
+   retelling?
+
+9. Do you have any other generic comments?
+
+Please send surveys to puzzle@mit.edu.

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_10_Puzzle.html/Puzzle.html

@@ -0,0 +1,50 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2000, Puzzle 1.10
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+<!-- XXX Edit this part here -->
+1.10: Ad-verse Opinion
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+
+Dorothy wandered down the infinite corridor, trying doorknobs and
+looking for <b>anything</b> that might help her find her way.  She
+finally came to a door labelled "C M Vest" that was open.  She
+opened the door and cautiously looked around the office to see what
+there was to see. Nothing useful appeared to get accomplished in this office.
+Perhaps now she knew why -- on the computer screen was this hideous
+example of poetry.  Was this what he did all day?
+
+  </i></blockquote>
+
+
+
+<body>
+I'll craft a homily, I'll test in fear<br>
+In a daze my dear face you'll see<br>
+Inky fate teases you, no rest you'll get<br>
+Upon a sweet defeat you join greater ill<br>
+You fear a million ill faces as fated<br>
+You are acceded no minion, dared no rest<br>
+You were saved on fast craft tagged Joy<br>
+Jolly, greatest test ever in staged phony ploy<br>
+</body><script type="module" src="/checkanswer.js"></script>
+ </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_10_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_10_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_11_Puzzle.html/Puzzle.html

@@ -0,0 +1,108 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Puzzle 1.11
+
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+<!-- XXX Edit this part here -->
+1.11: Primate Conflict
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+
+<p>
+Wandering about the 'tute, Dorothy's mind wandered as
+well and she reminisced about the attack by the flying 
+monkeys. Even though she was pretty sure it wouldn't 
+happen here, she started to think of some other famous
+battles....
+</i></blockquote>
+
+<body>
+
+<table COLS=2 WIDTH="700" >
+<tr>
+<td>Battle of Wakefield
+<br>Battle of Kirina
+<br>&nbsp;</td>
+
+<td>Battle of Mortimer's Cross
+<br>Battle of Arsuf
+<br>&nbsp;</td>
+</tr>
+
+<tr>
+<td>Battle of Blood River
+<br>Siege de Toulon
+<br>&nbsp;</td>
+
+<td>Battle of Nancy
+<br>Battle of Stirling
+<br>&nbsp;</td>
+</tr>
+
+<tr>
+<td>Battle of Granicus River
+<br>Battle of Delion
+<br>&nbsp;</td>
+
+<td>Battle of Minatogawa
+<br>Battle of Hastings&nbsp;
+<br>&nbsp;</td>
+</tr>
+
+<tr>
+<td>Battle of Hungna
+<br>Battle of Cesme
+<br>&nbsp;</td>
+
+<td>Battle of Leipzig
+<br>Battle of Gravelines
+<br>&nbsp;</td>
+</tr>
+
+<tr>
+<td>Battle of Kasserine Pass
+<br>Battle of Manila Bay
+<br>&nbsp;</td>
+
+<td>Naval Battle of La Rochelle
+<br>Conquest of Lisboa
+<br>&nbsp;</td>
+</tr>
+
+<tr>
+<td>Battle of Talikota
+<br>Battle of Aljubarrota
+<br>&nbsp;</td>
+
+<td>Battle of Manzikert
+<br>Battle of Guadelete
+<br>&nbsp;</td>
+</tr>
+</table>
+
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
+
+
+
+

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_11_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_11_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_1_Puzzle.html/Puzzle.html

@@ -0,0 +1,85 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2000, Puzzle 1.1
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+1.1: Alternatives
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+"Gosh, Lion, the course offerings at MIT really do run the gamut, don't they?"<p>
+"Darn right they do. So many choices," fretted the Lion. "How will I ever decide?"
+
+  </i></blockquote>
+
+
+Abidjan resident
+<br>
+Bouffant or beehive sources
+<br>
+Colorado ski resort
+<br>
+Deficient in ethical principles
+<br>
+External wall covering
+<br>
+Fitness freak Richard
+<br>
+Gibbon of Sumatra
+<br>
+Horse outfitter
+<br>
+Interjection expressing happiness
+<br>
+Jealous, desirous person
+<br>
+Kid's shoebox project
+<br>
+Lupanar, in slang
+<br>
+Make happen
+<br>
+Negative terminal, in an electrolytic cell
+<br>
+One-time Princess of Wales
+<br>
+Prima donna
+<br>
+Quantum mechanics pioneer Eugene
+<br>
+Redolent
+<br>
+Store temporarily, as a web page
+<br>
+Toiler
+<br>
+Unnecessary or excessive chatter
+<br>
+Vocal ensemble
+<br>
+Will it play there?
+<br>
+Xiamen, Vientiane or Jaipur native
+<br>
+"You Make Me Feel Like Dancing" singer
+<br>
+Zaian or Zemmour tribe member
+
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_1_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_1_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_2_Puzzle.html/Puzzle.html

@@ -0,0 +1,72 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2000, Puzzle 1.2
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+1.2: Recommended Reading
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+Dorothy marveled at the Scarecrow's collection. "Scarecrow, you sure have
+been reading a lot lately!"<p>
+
+"Absolutely! See, after I failed 18.01 I decided to switch from
+mechanical engineering to literature." <p>
+
+"You failed 18.01? Is that Pythagorean theorem still giving you trouble?"
+<p>
+
+"Don't remind me. Course 21 is much easier, you see:
+writers use a lot of words but end up
+not saying very much."
+<p>
+"Oh, you mean the way you do?"
+<p>
+The Scarecrow glared at Dorothy in disapproval.
+
+  </i></blockquote>
+
+  <pre>
+
+---- -- - ---- -- - ---- -- - ----. (1913)
+A  A
+
+
+-- --- --- ---- -- -----, -- --- --- ----- -- -----, ... (1859) 
+       AA                        BB
+
+
+--- ----- -- -- ------ - -----, --- ----- -- -- ------ - -----. (1923)
+              B              A             A
+
+
+--- ---- -- ---- ---- ---, --- ---- -- ---- ----, --- ---- -- ----- ---- --- ... (1954)
+ A                      B
+
+
+------ -- -----, ----- ------, ... (1820) 
+   BB  B  A
+
+
+---- - ------, ---- - ------, ---- - ------ ------, ... (1854) 
+A                                           BB
+
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_2_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_2_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_3_Puzzle.html/Puzzle.html

@@ -0,0 +1,75 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Puzzle 1.3
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+
+1.3: Dorothy Helps a Hack
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+
+  "What if he looks up?" Dorothy whispered, pointing at the CP who
+  just wandered into Lobby 7.<p>
+
+  "They never look up," said Jack, taking advantage of an opening by
+  planting a vicious cherry bomb at Dorothy's feet.  "You're out,
+  Dorothy."  Dorothy sighed and got back in line.<p>
+
+  Once James took Dorothy's spot on the playing field, J. Arthur
+stepped on
+  the court.  "Hey!" he called out to the CP, "little help?"<p>
+
+  The CP chuckled at the simple game and moved on, never looking up,
+  never noticing Thomas and Sigmund high above as they hung a large
+  banner inside the Little Dome with the following two dozen phrases
+  scrawled on it...<p>
+
+  </i></blockquote>
+
+  <pre>
+ACME rival
+Creator of lightbulbs?
+Custard
+Even funnier than LOL :-)
+Gray, for one
+He did it, she did it
+Jejuna followers
+Judy Garland, for one
+Kelsey's co-star
+Loyal to the Scottish
+Mimic
+Protected
+Rosalind, Margaret, or Kip
+Seat of Malheur County
+Senator's right hand
+Separates a Man from his Mancha
+She is in Spain?
+Sheindlin's rival
+Special group or band
+Strumpet
+Type of office
+WGBH production
+Wayne portrayer
+Wicked
+
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_3_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_3_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_4_Puzzle.html/Puzzle.html

@@ -0,0 +1,42 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Puzzle 1.4
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+1.4: Winds of Confusion
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+
+
+<p>Whooooshhh!!!!! Suddenly an eerie but somehow heartening strong gust
+of wind blew by Dorothy. Mussing up her skirt and making
+her go into a tizzy, she had to sit down. After recovering, Dorothy
+looked about and saw that the breeze brought the following on a piece of
+paper.
+</i></blockquote>
+
+<br>&nbsp;
+<br>&nbsp;
+<blockquote>
+<blockquote><img SRC="symbols.gif" height=42 width=252></blockquote>
+</blockquote>
+
+</body><script type="module" src="/checkanswer.js"></script>
+</html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_4_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_4_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_5_Puzzle.html/Puzzle.html

@@ -0,0 +1,120 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2000, Puzzle 1.5
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+1.5: Battleships In Space!
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+  "You know," a nervous, stammering fellow told Dorothy, "you're not
+  the only film character to ever attend MIT.  I myself hail from MIT and
+  I was able to stave off an alien invasion with my trusty Powerbook!"
+
+  </i></blockquote>
+
+  <pre>
+
+For centuries, aliens have been floating over our countryside, spying
+intently on the letters beneath them, occasionally replacing one of
+our letters with one of their insidious "crop-circle" hieroglyphics.
+(Well, except for "Z"; they don't seem to be too interested in "Z".)
+
+We now believe that they are readying their forces for an all-out
+strike on several continents, devastating our way of writing and
+confusing schoolchildren of all nations.  Only by finding every hidden
+ship and cracking their secret code will you be able to preserve our
+precious alphabet!
+
+A single 4x1x1 alien battleship, two 3x1x1 alien cruisers, three 2x1x1
+alien destroyers, and four 1x1x1 alien surveillance pods are all
+hiding out in each section of space below.  Each segment of a ship
+occupies a single cell.  Ships do not touch each other, even
+diagonally.  The numbers along the back panels reveal the total number
+of ship segments in each row.
+
+
+            | 0  1  0  0  4                 | 1  0  1  1  1
+          1 |                             3 |
+        1   |                           1   |
+      1     | 3  1  1  0  0           0     | 0  1  0  2  0
+    1     1 |                       0     0 |
+  1     0   |                     0     0   |
+      1     | 0  1  0  1  0           0     | 1  2  0  1  0
+    1     1 |                       1     0 |
+  2     1   |                     2     1   |
+      0     | 0  1  0  1  0           2     | 0  1  0  1  0
+    0     0 |                       0     0 |
+  0     0   |                     1     0   |
+      0     | 2  1  2  0  1           0     | 3  1  1  0  2
+    2     3 |_______________        1     2 |_______________
+  0     2  ,'                     1     3  ,'
+      0  ,'  A  B  C  D  E            1  ,'  A  B  C  D  E
+    1  ,'  F  G  H  I  J            0  ,'  F  G  H  I  J
+  0  ,'  K  L  M  N  O            1  ,'  K  L  M  N  O
+   ,'  P  Q  R  S  T               ,'  P  Q  R  S  T
+  '  U  V  W  X  Y                '  U  V  W  X  Y
+
+
+            | 1  2  1  1  0                 | 3  1  0  1  1
+          1 |                             1 |
+        0   |                           0   |
+      1     | 1  0  0  1  0           1     | 1  0  0  1  0
+    0     1 |                       0     1 |
+  3     1   |                     4     1   |
+      0     | 2  2  0  1  0           0     | 4  0  0  1  0
+    0     1 |                       0     1 |
+  0     0   |                     0     0   |
+      1     | 1  1  0  2  0           1     | 1  0  1  1  1
+    1     2 |                       2     4 |
+  2     1   |                     1     0   |
+      1     | 0  2  1  0  1           0     | 0  2  0  1  0
+    0     0 |_______________        0     0 |_______________
+  0     0  ,'                     0     0  ,'
+      1  ,'  A  B  C  D  E            1  ,'  A  B  C  D  E
+    1  ,'  F  G  H  I  J            2  ,'  F  G  H  I  J
+  2  ,'  K  L  M  N  O            0  ,'  K  L  M  N  O
+   ,'  P  Q  R  S  T               ,'  P  Q  R  S  T
+  '  U  V  W  X  Y                '  U  V  W  X  Y
+
+
+            | 0  1  0  1  2                 | 0  2  0  4  0
+          1 |                             0 |
+        0   |                           1   |
+      1     | 0  1  0  1  2           2     | 0  1  0  0  0
+    0     1 |                       1     0 |
+  2     1   |                     2     0   |
+      1     | 1  0  1  1  2           1     | 2  1  0  1  0
+    0     1 |                       0     2 |
+  1     0   |                     0     1   |
+      1     | 2  1  1  0  1           0     | 2  0  0  1  0
+    0     2 |                       0     0 |
+  3     0   |                     1     0   |
+      1     | 0  0  2  0  0           1     | 3  0  1  1  1
+    0     0 |_______________        1     1 |_______________
+  2     0  ,'                     1     3  ,'
+      0  ,'  A  B  C  D  E            1  ,'  A  B  C  D  E
+    1  ,'  F  G  H  I  J            0  ,'  F  G  H  I  J
+  1  ,'  K  L  M  N  O            1  ,'  K  L  M  N  O
+   ,'  P  Q  R  S  T               ,'  P  Q  R  S  T
+  '  U  V  W  X  Y                '  U  V  W  X  Y
+
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_5_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_5_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_6_Puzzle.html/Puzzle.html

@@ -0,0 +1,48 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Puzzle 1.6
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<!-- XXX Edit this part here -->
+1.6: Secular Fun with Pentagrams
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+Strolling confusedly through the buildings of MIT, Dorothy found 
+herself in Building 5, staring at a wall which had "IHTFP" spray 
+painted on the wall in large red letters. "How strange..." she thought 
+out loud, and was answered by a student who popped his head out of a 
+door. "Not at all, really. This is building five. We loooove things 
+that come in fives! Especially groups of five letters! Just take a look 
+at our motto!" He gestured toward an inscription along the ceiling. 
+Dorothy looked at it and frowned, more confused than ever.
+
+  </i></blockquote>
+
+  <pre>
+
+CODDD NAANA PEBNB FEBDC RGGRE PEPEG IKIII ODODD SAKTA ACCHC SDFHD DDODD 
+OCKMC JAPAA ONNOO TTOPP EPPPP ANMNM OLPNM EHEFI NMNMN UWCXC TTTTP SBBTS 
+KRRRT RUQTS
+
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_6_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_6_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_7_Puzzle.html/Puzzle.html

@@ -0,0 +1,74 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2000, Puzzle 1.7
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+1.7: Mumbo-Jumbo
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+Dorothy and the Lion sat in the back of the lecture hall, while the professor gesticulated
+wildly and spoke incomprehensibly. "Impressive, isn't it?" whispered Dorothy.<P>
+
+"Not in the slightest," replied the Lion. "That professor may use a lot of big mumbo-jumbo
+words, but I hear he's just a big phony."
+
+  </i></blockquote>
+
+  <pre>
+
+Larry Appleton:
+  ,---. ,---. ,---. ,---. ,---.
+  |   | |   | |   | |   | |   |
+  |  3| |  4| |  3| |  1| |   |
+  `---' `---' `---' `---' `---'
+
+Bart Simpson:
+  ,---. ,---. ,---. ,---. ,---. ,---. ,---.
+  |   | |   | |   | |   | |   | |   | |   |
+  |  5| |  4| |  4| |  8| |   | |  3| |  1|
+  `---' `---' `---' `---' `---' `---' `---'
+
+Paul Buchman:
+  ,---. ,---. ,---. ,---.
+  |   | |   | |   | |   |
+  |  4| |  1| |  1| |   |
+  `---' `---' `---' `---'
+
+Helen Seinfeld:
+  ,---. ,---. ,---. ,---. ,---.
+  |   | |   | |   | |   | |   |
+  | 10| |  1| |  1| |   | |  1|
+  `---' `---' `---' `---' `---'
+
+Cat:
+  ,---. ,---. ,---. ,---. ,---. ,---. ,---.
+  |   | |   | |   | |   | |   | |   | |   |
+  |  8| |   | | 10| |  8| |  4| | 10| |  5|
+  `---' `---' `---' `---' `---' `---' `---'
+
+Jack McFarland:
+  ,---. ,---. ,---. ,---. ,---. ,---.
+  |   | |   | |   | |   | |   | |   |
+  |  1| |  3| |   | |  1| |  3| |  3|
+  `---' `---' `---' `---' `---' `---'
+
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_7_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_7_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_8_Puzzle.html/Puzzle.html

@@ -0,0 +1,429 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Puzzle 1.8
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<!-- XXX Edit this part here -->
+1.8: Rack Your Brain
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+Dorothy approached the young man, who seemed to be studying something on the
+table in front of him, deep in thought.  He was an unusual-looking fellow,
+with keen eyes and a large bushy beard of fire-red hair; and, despite the
+blizzard outside, he was wearing shorts.  As Dorothy got closer, she could
+see that the focus of his interest was a Scrabble board he had spread out
+in front of him.
+
+<p>"Are you playing Scrabble?" asked Dorothy.
+<p>"Yes," said the man.
+<p>"Who are you playing against?"
+<p>"Myself."
+<p>"You're practising?"
+<p>"Yes."
+<p>Dorothy studied the perplexing board, full of unfamiliar words. 
+"What does VUG mean?"
+<p>"A cavity in a rock."
+<p>"Do you know the definitions of all the words you play?"
+<p>"No."
+<p>"Wouldn't it be more fun if you only played words that you know the 
+meaning of?"
+<p>"Why?"
+<p>"Well, because... because...."  But Dorothy realised she couldn't
+find the words to justify her instinct.  "Anyway, you seem to be awfully good
+at this.  Would you mind teaching me a little?"
+<p>"Alright."
+<p>So Dorothy sat down across from the man, and they began to play.  "My name
+is Dorothy, by the way.  What's yours?"
+
+
+
+  </i></blockquote>
+
+  <center>
+
+<table border=0 cellpadding=2 cellspacing=2>
+<tr>
+<td align=center width=6%>
+<td align=center width=6%>A
+<td align=center width=6%>B
+<td align=center width=6%>C
+<td align=center width=6%>D
+<td align=center width=6%>E
+<td align=center width=6%>F
+<td align=center width=6%>G
+<td align=center width=6%>H
+<td align=center width=6%>I
+<td align=center width=6%>J
+<td align=center width=6%>K
+<td align=center width=6%>L
+<td align=center width=6%>M
+<td align=center width=6%>N
+<td align=center width=6%>O
+<tr>
+<td align=right>1
+<td align=center bgcolor=#ff6666>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>V
+<TD ALIGN=center bgcolor=#ffcc99>U
+<TD ALIGN=center bgcolor=#ffcc99>G
+<TD ALIGN=center bgcolor=#ffcc99>S
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ff6666>&nbsp;
+<tr>
+<td align=right>2
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#6666ff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>T
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#6666ff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<tr>
+<td align=right>3
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>O
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<tr>
+<td align=right>4
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>A
+<td align=center bgcolor=#ffcc99><i>b</i>
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<tr>
+<td align=right>5
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>S
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>E
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<tr>
+<td align=right>6
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#6666ff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>T
+<TD ALIGN=center bgcolor=#ffcc99>O
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>G
+<TD ALIGN=center bgcolor=#ffcc99>E
+<TD ALIGN=center bgcolor=#ffcc99>O
+<TD ALIGN=center bgcolor=#ffcc99>D
+<TD ALIGN=center bgcolor=#ffcc99>U
+<TD ALIGN=center bgcolor=#ffcc99>C
+<TD ALIGN=center bgcolor=#ffcc99>K
+<tr>
+<td align=right>7
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>H
+<TD ALIGN=center bgcolor=#ffcc99>A
+<TD ALIGN=center bgcolor=#ffcc99>R
+<TD ALIGN=center bgcolor=#ffcc99>P
+<TD ALIGN=center bgcolor=#ffcc99>O
+<TD ALIGN=center bgcolor=#ffcc99>O
+<TD ALIGN=center bgcolor=#ffcc99>N
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<tr>
+<td align=right>8
+<td align=center bgcolor=#ff6666>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>B
+<TD ALIGN=center bgcolor=#ffcc99>A
+<TD ALIGN=center bgcolor=#ffcc99>R
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>A
+<TD ALIGN=center bgcolor=#ffcc99>N
+<TD ALIGN=center bgcolor=#ffcc99>N
+<TD ALIGN=center bgcolor=#ffcc99>E
+<TD ALIGN=center bgcolor=#ffcc99>X
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ff6666>&nbsp;
+<tr>
+<td align=right>9
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>A
+<TD ALIGN=center bgcolor=#ffcc99>N
+<TD ALIGN=center bgcolor=#ffcc99>E
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>I
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<tr>
+<td align=right>10
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#6666ff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>L
+<TD ALIGN=center bgcolor=#ffcc99>E
+<TD ALIGN=center bgcolor=#ffcc99>D
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>F
+<TD ALIGN=center bgcolor=#ffcc99>A
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#6666ff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<tr>
+<td align=right>11
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcc99><i>l</i>
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>O
+<TD ALIGN=center bgcolor=#ffcc99>S
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<tr>
+<td align=right>12
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>S
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>R
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<tr>
+<td align=right>13
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>M
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<tr>
+<td align=right>14
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#6666ff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>E
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#6666ff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ffcccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<tr>
+<td align=right>15
+<td align=center bgcolor=#ff6666>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<TD ALIGN=center bgcolor=#ffcc99>E
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ccccff>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#cccccc>&nbsp;
+<td align=center bgcolor=#ff6666>&nbsp;
+<tr>
+<td colspan=16><br>
+<tr>
+<td align=right colspan=4>
+<td>
+<td align=center bgcolor=#ffcc99>V
+<td align=center bgcolor=#ffcc99>I
+<td align=center bgcolor=#ffcc99>N
+<td align=center bgcolor=#ffcc99>Y
+<td align=center bgcolor=#ffcc99>L
+<tr>
+<td align=right colspan=4>
+<td>
+<td align=center bgcolor=#ffcc99>B
+<td align=center bgcolor=#ffcc99>R
+<td align=center bgcolor=#ffcc99>O
+<td align=center bgcolor=#ffcc99>A
+<td align=center bgcolor=#ffcc99>D
+<tr>
+<td align=right colspan=4>
+<td>
+<td align=center bgcolor=#ffcc99>M
+<td align=center bgcolor=#ffcc99>A
+<td align=center bgcolor=#ffcc99>R
+<td align=center bgcolor=#ffcc99>T
+<tr>
+<td align=right colspan=4>
+<td>
+<td align=center bgcolor=#ffcc99>P
+<td align=center bgcolor=#ffcc99>I
+<td align=center bgcolor=#ffcc99>N
+<td align=center bgcolor=#ffcc99>C
+<td align=center bgcolor=#ffcc99>E
+<td align=center bgcolor=#ffcc99>R
+<tr>
+<td align=right colspan=4>
+<td>
+<td align=center bgcolor=#ffcc99>L
+<td align=center bgcolor=#ffcc99>E
+<td align=center bgcolor=#ffcc99>A
+<td align=center bgcolor=#ffcc99>F
+<td align=center bgcolor=#ffcc99>E
+<td align=center bgcolor=#ffcc99>D
+<tr>
+<td align=right colspan=4>
+<td>
+<td align=center bgcolor=#ffcc99>L
+<td align=center bgcolor=#ffcc99>I
+<td align=center bgcolor=#ffcc99>G
+<td align=center bgcolor=#ffcc99>H
+<td align=center bgcolor=#ffcc99>T
+</table>
+
+  </center>
+
+<p>Notation: lowercase letters denote blank tiles; the blank at 4I has been 
+used as a B, and the blank at 11D has been used as an L.
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_8_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_8_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_9_Puzzle.html/Puzzle.html

@@ -0,0 +1,70 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Puzzle 1.9
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<!-- XXX Edit this part here -->
+1.9: Oh, to be in DC
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+
+Dorothy went to see a W.I.Z.A.R.D. system administrator for some help getting into
+the system, only to find the
+following note posted on her door: <p>
+
+<blockquote>
+I'm on vacation this month. My itinerary is below; if you need to
+get in touch with me, the standard people in each country will
+have my address.<BR>
+</blockquote>
+
+  </i></blockquote>
+
+  <pre>
+
+TW 96 Friday, Jan 7 7:00 AM - 11:52 AM
+LI 311 Friday, Jan 7 1:45 PM - 2:20 PM
+LI 351 Friday, Jan 7 3:50 PM - 4:25 PM
+
+Lodging: Seaview Hotel
+
+IW 343  Wednesday, Jan 12 3:35 PM - Thursday, Jan 13 6:50 AM
+TK 1828 Thursday, Jan 13 4:05 PM - Thursday, Jan 13 8:30 PM
+TK 1386 Thursday, Jan 13 10:45 PM - Friday, Jan 14 3:05 AM
+
+Lodging: Hotel Victoria
+
+SR 3495 Sunday, Jan 16. 4:40 AM - 6:10 AM
+TG 971 Sunday, Jan 16. 1:30 PM - 6:10 AM
+TG 690 Monday, Jan 17  8:20 AM - 9:30 AM
+
+Lodging: Belvedere Hotel
+
+VN 820 Thursday, Jan 20 12:30 PM - 1:40 PM
+VN 924 Thursday, Jan 20 3:00 PM - 7:15 PM
+AA 7408 Thursday, Jan 20 11:30 PM - 6:15PM
+AA 198 Thursday, Jan 20 10:00 PM - Friday, Jan 21 6:34 AM
+
+
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_9_Puzzle.html/checkanswer.js

@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);

benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set1_9_Puzzle.html/index.html

@@ -0,0 +1,42 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 1</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 1</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<A HREF="11/Puzzle.html">Puzzle 11</A> <A HREF="11/Solution.html">Solution 11</A><BR>
+<BR>
+<A HREF="../hints/hint1.txt">Hint</A> <A HREF="../hints/solution1.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>