Fix bridges crossing-cell bridge gap; add puzzle pipeline + e2e tests

The bridges editor's bridgesBoardFromStates wrote "." for every empty
opportunity. When a vertical bridge passed through a cell also owned by an
unused horizontal opportunity (a crossing point), the later-processed empty
opportunity overwrote the shared cell back to ".", leaving a gap in the drawn
bridge. The board looked connected but failed verification ("not solved").
Fix: skip level-0 opportunities so they cannot clobber an active perpendicular
bridge's crossing cell.

Add a full-pipeline test harness to catch this class of editor encode/decode
bug across all six families:
- vitest round-trip: editor decode->encode of each dataset reference solution
(npm test). Fails on 7/15 bridges fixtures without the fix.
- verifier oracle: runs the real production verifier on every round-tripped
board (npm run test:pipeline) - 90 solutions + 90 round-trips verify SOLVED.
- Playwright smoke: draws the solution in the real UI and submits
(npm run test:e2e).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -13,6 +13,7 @@ frontend/.npm-cache/
 dist/
 data/
 results/
+test-results/
 submodules/rlp/build/
 submodules/rlp/rlp.egg-info/
 submodules/rlp/rlp/constants*.so

frontend/.gitignore

@@ -12,6 +12,11 @@ dist
 dist-ssr
 *.local
 
+# Playwright / test outputs (transient)
+test-results
+playwright-report
+test/pipeline/roundtrip_out.json
+
 # Editor directories and files
 .vscode/*
 !.vscode/extensions.json

frontend/e2e/bridges.spec.ts

@@ -0,0 +1,60 @@
+import { readFileSync } from "node:fs";
+import { test, expect } from "@playwright/test";
+
+type Fixture = {
+  family: string;
+  difficulty: string;
+  filename: string;
+  args: string;
+  problem: string;
+  solution: string;
+};
+
+const fixtures: Fixture[] = JSON.parse(
+  readFileSync(new URL("./../test/pipeline/fixtures.json", import.meta.url), "utf8"),
+);
+// Click plan (ordered grid-button indices, repeated for double bridges) is
+// precomputed by the vitest round-trip step from the real editor functions.
+const clickPlan: Record<string, number[]> = JSON.parse(
+  readFileSync(new URL("./../test/pipeline/bridges_clickplan.json", import.meta.url), "utf8"),
+);
+
+const fixture =
+  fixtures.find((f) => f.family === "bridges" && f.difficulty === "medium") ??
+  fixtures.find((f) => f.family === "bridges");
+
+test("bridges: drawing the reference solution in the real UI verifies as solved", async ({
+  page,
+  request,
+}) => {
+  expect(fixture, "no bridges fixture available").toBeTruthy();
+  const f = fixture!;
+  const clicks = clickPlan[f.filename];
+  expect(clicks?.length, `no click plan for ${f.filename}`).toBeGreaterThan(0);
+
+  // Seed a deterministic session for this exact puzzle via the real API.
+  const res = await request.post("/api/sessions", {
+    data: {
+      player_name: "test", // 'test' players are excluded from the leaderboard
+      puzzle_type: "bridges",
+      difficulty: f.difficulty,
+      puzzle_id: f.filename,
+    },
+  });
+  expect(res.ok(), `create session failed: ${res.status()}`).toBeTruthy();
+  const session = await res.json();
+
+  await page.goto(`/play/${session.session_id}`);
+  const grid = page.locator(".bridges-grid");
+  await expect(grid).toBeVisible();
+  const buttons = grid.locator("button");
+
+  for (const idx of clicks) {
+    await buttons.nth(idx).click();
+  }
+
+  await page.getByRole("button", { name: "Submit" }).click();
+
+  // Solving navigates to /done/{id}; "not solved" would keep us on /play with a banner.
+  await expect(page).toHaveURL(/\/done\//, { timeout: 15_000 });
+});

frontend/package-lock.json

@@ -14,6 +14,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^10.0.1",
+        "@playwright/test": "^1.60.0",
         "@types/node": "^24.12.3",
         "@types/react": "^19.2.14",
         "@types/react-dom": "^19.2.3",
@@ -24,7 +25,8 @@
         "globals": "^17.6.0",
         "typescript": "~6.0.2",
         "typescript-eslint": "^8.59.2",
-        "vite": "^8.0.12"
+        "vite": "^8.0.12",
+        "vitest": "^3.2.6"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -301,6 +303,448 @@
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       }
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@@ -517,67 +961,270 @@
         "@jridgewell/trace-mapping": "^0.3.24"
       }
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+        "js-tokens": "^9.0.1"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/antfu"
+      }
+    },
+    "node_modules/strip-literal/node_modules/js-tokens": {
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+      "integrity": "sha512-mxa9E9ITFOt0ban3j6L5MpjwegGz6lBQmM1IJkWeBZGcMxto50+eWdjC/52xDbS2vy0k7vIMK0Fe2wfL9OQSpQ==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/tinybench": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",
+      "integrity": "sha512-0+DUvqWMValLmha6lr4kD8iAMK1HzV0/aKnCtWb9v9641TnP/MFb7Pc2bxoxQjTXAErryXVgUOfv2YqNllqGeg==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/tinyexec": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-0.3.2.tgz",
+      "integrity": "sha512-KQQR9yN7R5+OSwaK0XQoj22pwHoTlgYqmUscPYoknOoWCWfj/5/ABTMRi69FrKU5ffPVh5QcFikpWJI/P1ocHA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/tinyglobby": {
       "version": "0.2.16",
       "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.16.tgz",
@@ -2522,6 +3745,36 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
+    "node_modules/tinypool": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/tinypool/-/tinypool-1.1.1.tgz",
+      "integrity": "sha512-Zba82s87IFq9A9XmjiX5uZA/ARWDrB03OHlq+Vw1fSdt0I+4/Kutwy8BP4Y/y/aORMo61FQ0vIb5j44vSo5Pkg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^18.0.0 || >=20.0.0"
+      }
+    },
+    "node_modules/tinyrainbow": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-2.0.0.tgz",
+      "integrity": "sha512-op4nsTR47R6p0vMUUoYl/a+ljLFVtlfaXkLQmqfLR1qHma1h/ysYk4hEXZ880bf2CYgTskvTa/e196Vd5dDQXw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
+    "node_modules/tinyspy": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/tinyspy/-/tinyspy-4.0.4.tgz",
+      "integrity": "sha512-azl+t0z7pw/z958Gy9svOTuzqIk6xq+NSheJzn5MMWtWTFywIacg2wUlzKFGtt3cthx0r2SxMK0yzJOR0IES7Q==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/ts-api-utils": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/ts-api-utils/-/ts-api-utils-2.5.0.tgz",
@@ -2720,6 +3973,279 @@
         }
       }
     },
+    "node_modules/vite-node": {
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/vite-node/-/vite-node-3.2.4.tgz",
+      "integrity": "sha512-EbKSKh+bh1E1IFxeO0pg1n4dvoOTt0UDiXMd/qn++r98+jPO1xtJilvXldeuQ8giIB5IkpjCgMleHMNEsGH6pg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "cac": "^6.7.14",
+        "debug": "^4.4.1",
+        "es-module-lexer": "^1.7.0",
+        "pathe": "^2.0.3",
+        "vite": "^5.0.0 || ^6.0.0 || ^7.0.0-0"
+      },
+      "bin": {
+        "vite-node": "vite-node.mjs"
+      },
+      "engines": {
+        "node": "^18.0.0 || ^20.0.0 || >=22.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/vite-node/node_modules/vite": {
+      "version": "7.3.5",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-7.3.5.tgz",
+      "integrity": "sha512-KuOaNhcnGFN2zIPGA7wRmzF+lJA1sea7rHq17aiJ++9lzY1WWG6Jpwqwe1KNbRVPIqHmr8GLYx7jbrQcN/7/ww==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "esbuild": "^0.27.0",
+        "fdir": "^6.5.0",
+        "picomatch": "^4.0.3",
+        "postcss": "^8.5.6",
+        "rollup": "^4.43.0",
+        "tinyglobby": "^0.2.15"
+      },
+      "bin": {
+        "vite": "bin/vite.js"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "funding": {
+        "url": "https://github.com/vitejs/vite?sponsor=1"
+      },
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+        "fsevents": "~2.3.3"
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+        "less": "^4.0.0",
+        "lightningcss": "^1.21.0",
+        "sass": "^1.70.0",
+        "sass-embedded": "^1.70.0",
+        "stylus": ">=0.54.8",
+        "sugarss": "^5.0.0",
+        "terser": "^5.16.0",
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
+      },
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+        },
+        "sass-embedded": {
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+        },
+        "stylus": {
+          "optional": true
+        },
+        "sugarss": {
+          "optional": true
+        },
+        "terser": {
+          "optional": true
+        },
+        "tsx": {
+          "optional": true
+        },
+        "yaml": {
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+        }
+      }
+    },
+    "node_modules/vitest": {
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+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-3.2.6.tgz",
+      "integrity": "sha512-xejya+bT/j/+R/AGa1XOfRxLmNUlLtlwjRsFUILF+xHfzElmGcmFydy2gqqIrd62ptIEfwVMofd19uNWD9L7Nw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/chai": "^5.2.2",
+        "@vitest/expect": "3.2.6",
+        "@vitest/mocker": "3.2.6",
+        "@vitest/pretty-format": "^3.2.6",
+        "@vitest/runner": "3.2.6",
+        "@vitest/snapshot": "3.2.6",
+        "@vitest/spy": "3.2.6",
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+        "tinybench": "^2.9.0",
+        "tinyexec": "^0.3.2",
+        "tinyglobby": "^0.2.14",
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+        "tinyrainbow": "^2.0.0",
+        "vite": "^5.0.0 || ^6.0.0 || ^7.0.0-0",
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+        "why-is-node-running": "^2.3.0"
+      },
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+        "vitest": "vitest.mjs"
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+        "node": "^18.0.0 || ^20.0.0 || >=22.0.0"
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+        "happy-dom": "*",
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+        }
+      }
+    },
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+      "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-3.2.6.tgz",
+      "integrity": "sha512-EZOrpDbkKotFAP7wPAQV1UIyoGOk4oX7ynWhBhLB7v+meMHbQhU16oPpIYGTTe4oFlhpryGpgpcZP/sin3hYuw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/spy": "3.2.6",
+        "estree-walker": "^3.0.3",
+        "magic-string": "^0.30.17"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
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+        "msw": "^2.4.9",
+        "vite": "^5.0.0 || ^6.0.0 || ^7.0.0-0"
+      },
+      "peerDependenciesMeta": {
+        "msw": {
+          "optional": true
+        },
+        "vite": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/vitest/node_modules/vite": {
+      "version": "7.3.5",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-7.3.5.tgz",
+      "integrity": "sha512-KuOaNhcnGFN2zIPGA7wRmzF+lJA1sea7rHq17aiJ++9lzY1WWG6Jpwqwe1KNbRVPIqHmr8GLYx7jbrQcN/7/ww==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "esbuild": "^0.27.0",
+        "fdir": "^6.5.0",
+        "picomatch": "^4.0.3",
+        "postcss": "^8.5.6",
+        "rollup": "^4.43.0",
+        "tinyglobby": "^0.2.15"
+      },
+      "bin": {
+        "vite": "bin/vite.js"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "funding": {
+        "url": "https://github.com/vitejs/vite?sponsor=1"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.3"
+      },
+      "peerDependencies": {
+        "@types/node": "^20.19.0 || >=22.12.0",
+        "jiti": ">=1.21.0",
+        "less": "^4.0.0",
+        "lightningcss": "^1.21.0",
+        "sass": "^1.70.0",
+        "sass-embedded": "^1.70.0",
+        "stylus": ">=0.54.8",
+        "sugarss": "^5.0.0",
+        "terser": "^5.16.0",
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
+      },
+      "peerDependenciesMeta": {
+        "@types/node": {
+          "optional": true
+        },
+        "jiti": {
+          "optional": true
+        },
+        "less": {
+          "optional": true
+        },
+        "lightningcss": {
+          "optional": true
+        },
+        "sass": {
+          "optional": true
+        },
+        "sass-embedded": {
+          "optional": true
+        },
+        "stylus": {
+          "optional": true
+        },
+        "sugarss": {
+          "optional": true
+        },
+        "terser": {
+          "optional": true
+        },
+        "tsx": {
+          "optional": true
+        },
+        "yaml": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -2736,6 +4262,23 @@
         "node": ">= 8"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",

frontend/package.json

@@ -7,7 +7,10 @@
     "dev": "vite",
     "build": "tsc -b && vite build",
     "lint": "eslint .",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test": "vitest run",
+    "test:pipeline": "bash test/pipeline/run.sh",
+    "test:e2e": "npm run build && playwright test"
   },
   "dependencies": {
     "react": "^19.2.6",
@@ -16,6 +19,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
+    "@playwright/test": "^1.60.0",
     "@types/node": "^24.12.3",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
@@ -26,6 +30,7 @@
     "globals": "^17.6.0",
     "typescript": "~6.0.2",
     "typescript-eslint": "^8.59.2",
-    "vite": "^8.0.12"
+    "vite": "^8.0.12",
+    "vitest": "^3.2.6"
   }
 }

frontend/playwright.config.ts

@@ -0,0 +1,31 @@
+import { defineConfig } from "@playwright/test";
+
+// E2E smoke test drives the REAL stack: one uvicorn process serves both the API
+// and the built frontend (same-origin /api). The frontend must be built first
+// (`npm run build`) so space_app can serve frontend/dist.
+const PORT = 7860;
+
+export default defineConfig({
+  testDir: "./e2e",
+  timeout: 60_000,
+  fullyParallel: false,
+  reporter: [["list"]],
+  use: {
+    baseURL: `http://127.0.0.1:${PORT}`,
+    headless: true,
+  },
+  webServer: {
+    command: `bash -c "cd .. && uvicorn space_app.main:app --host 127.0.0.1 --port ${PORT}"`,
+    url: `http://127.0.0.1:${PORT}/api/puzzles?puzzle_type=bridges&difficulty=medium`,
+    timeout: 180_000,
+    reuseExistingServer: true,
+    env: {
+      // Keep the e2e run off the real /data dir; reuse the existing HF dataset cache.
+      TOPOBENCH_DATA_DIR: "/tmp/topobench_e2e",
+      HF_HOME: `${process.env.HOME}/.cache/huggingface`,
+      SDL_AUDIODRIVER: "dummy",
+      SDL_VIDEODRIVER: "dummy",
+      PYTHONWARNINGS: "ignore",
+    },
+  },
+});

frontend/src/components/PuzzleEditor.tsx

@@ -150,18 +150,16 @@ function bridgesBoardFromStates(
   const grid = cloneGrid(parsed.lines);
   for (const opportunity of parsed.opportunities) {
     const level = states[opportunity.id] ?? 0;
+    // The grid starts as a fresh copy of the problem (non-clue cells are "."),
+    // so a level-0 opportunity has nothing to add. Skip it: writing "." here
+    // would clobber the crossing cell of an *active* perpendicular bridge that
+    // shares this cell (e.g. a vertical bridge passing through a cell also owned
+    // by an unused horizontal opportunity), leaving a gap in the drawn bridge.
+    if (level === 0) {
+      continue;
+    }
     const symbol =
-      opportunity.kind === "horizontal"
-        ? level === 2
-          ? "="
-          : level === 1
-            ? "-"
-            : "."
-        : level === 2
-          ? '"'
-          : level === 1
-            ? "|"
-            : ".";
+      opportunity.kind === "horizontal" ? (level === 2 ? "=" : "-") : level === 2 ? '"' : "|";
     for (const [r, c] of opportunity.cells) {
       grid[r][c] = symbol;
     }
@@ -945,3 +943,26 @@ export function PuzzleEditor(props: Props) {
   }
   return null;
 }
+
+// Test-only barrel: exposes the pure encode/decode helpers so the round-trip
+// pipeline tests can exercise the *real* editor functions (not reimplementations).
+// These mirror exactly what each <Family>Editor's onChange emits.
+export const __testables = {
+  splitLines,
+  cloneGrid,
+  joinGrid,
+  parseBridges,
+  bridgesBoardFromStates,
+  bridgesStatesFromBoard,
+  parseLoopy,
+  loopyEdgeStates,
+  loopyBoardFromStates,
+  parseGalaxies,
+  galaxiesBoundaryStates,
+  galaxiesBoardFromStates,
+  parsePattern,
+  patternToAscii,
+  normalizePatternAscii,
+  parseUndead,
+  undeadToAscii,
+};

frontend/test/pipeline/bridges_clickplan.json

@@ -0,0 +1,316 @@
+{
+ "bridges_5x5de_6b8d9460.txt": [
+  2,
+  9,
+  6,
+  10,
+  13,
+  13,
+  21,
+  21
+ ],
+ "bridges_5x5de_3ab345b4.txt": [
+  2,
+  2,
+  6,
+  6,
+  9,
+  17,
+  17,
+  21,
+  23,
+  23
+ ],
+ "bridges_5x5de_750be39d.txt": [
+  1,
+  1,
+  5,
+  3,
+  3,
+  7,
+  7,
+  13,
+  21
+ ],
+ "bridges_5x5de_d6a8fd57.txt": [
+  1,
+  5,
+  8,
+  14,
+  14,
+  12,
+  21,
+  21
+ ],
+ "bridges_5x5de_62b29e16.txt": [
+  1,
+  7,
+  14,
+  15,
+  21,
+  21,
+  23
+ ],
+ "bridges_7x7dm_159f418e.txt": [
+  3,
+  3,
+  5,
+  13,
+  8,
+  8,
+  14,
+  16,
+  22,
+  22,
+  19,
+  27,
+  27,
+  30,
+  41,
+  41,
+  43,
+  43
+ ],
+ "bridges_7x7dm_98d15fca.txt": [
+  1,
+  7,
+  7,
+  5,
+  11,
+  13,
+  13,
+  29,
+  33,
+  33,
+  39,
+  39,
+  44,
+  44,
+  47,
+  47
+ ],
+ "bridges_7x7dm_c4439c2d.txt": [
+  1,
+  1,
+  7,
+  13,
+  15,
+  21,
+  21,
+  18,
+  18,
+  31,
+  27,
+  29,
+  29,
+  32,
+  32,
+  44,
+  44,
+  47,
+  47
+ ],
+ "bridges_7x7dm_5d7e81df.txt": [
+  2,
+  2,
+  13,
+  14,
+  16,
+  18,
+  24,
+  24,
+  27,
+  29,
+  32,
+  43
+ ],
+ "bridges_7x7dm_24cecc91.txt": [
+  1,
+  7,
+  7,
+  5,
+  11,
+  13,
+  9,
+  22,
+  22,
+  17,
+  21,
+  37,
+  37,
+  40,
+  43
+ ],
+ "bridges_10x10dh_e91c08d0.txt": [
+  1,
+  1,
+  5,
+  14,
+  14,
+  8,
+  27,
+  19,
+  19,
+  26,
+  28,
+  31,
+  40,
+  35,
+  44,
+  46,
+  61,
+  65,
+  65,
+  78,
+  89,
+  81,
+  86,
+  93
+ ],
+ "bridges_10x10dh_dbb54860.txt": [
+  1,
+  1,
+  10,
+  4,
+  4,
+  13,
+  13,
+  7,
+  16,
+  18,
+  29,
+  29,
+  22,
+  31,
+  24,
+  33,
+  35,
+  35,
+  44,
+  44,
+  49,
+  49,
+  55,
+  55,
+  62,
+  71,
+  71,
+  64,
+  73,
+  73,
+  79,
+  79,
+  91,
+  94,
+  94
+ ],
+ "bridges_10x10dh_9a2eb1a6.txt": [
+  2,
+  4,
+  13,
+  13,
+  6,
+  6,
+  15,
+  18,
+  18,
+  21,
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+ ]
+}

frontend/test/pipeline/fixtures.json

@@ -0,0 +1,722 @@
+[
+ {
+  "family": "bridges",
+  "difficulty": "easy",
+  "filename": "bridges_5x5de_6b8d9460.txt",
+  "args": "5x5de",
+  "problem": ".1..2\n2..3.\n.....\n...2.\n3...3",
+  "solution": ".1--2\n2--3|\n|..\"|\n|..2|\n3===3"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "easy",
+  "filename": "bridges_5x5de_3ab345b4.txt",
+  "args": "5x5de",
+  "problem": ".4..3\n.....\n.....\n.4.2.\n1.3.3",
+  "solution": ".4==3\n.\"..|\n.\"..|\n.4=2|\n1-3=3"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "easy",
+  "filename": "bridges_5x5de_750be39d.txt",
+  "args": "5x5de",
+  "problem": "3.4.2\n.2.3.\n.....\n.....\n2..2.",
+  "solution": "3=4=2\n|2=3.\n|..|.\n|..|.\n2--2."
+ },
+ {
+  "family": "bridges",
+  "difficulty": "easy",
+  "filename": "bridges_5x5de_d6a8fd57.txt",
+  "args": "5x5de",
+  "problem": "2..2.\n....2\n.1.2.\n.....\n3...4",
+  "solution": "2--2.\n|..|2\n|1-2\"\n|...\"\n3===4"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "easy",
+  "filename": "bridges_5x5de_62b29e16.txt",
+  "args": "5x5de",
+  "problem": "1.2..\n....1\n1....\n.....\n3.4.2",
+  "solution": "1-2..\n..|.1\n1.|.|\n|.|.|\n3=4-2"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "medium",
+  "filename": "bridges_7x7dm_159f418e.txt",
+  "args": "7x7dm",
+  "problem": "..2.3.2\n3....2.\n.3..2.4\n.......\n.3....5\n.......\n3.....4",
+  "solution": "..2=3-2\n3====2|\n|3--2-4\n|\"....\"\n|3----5\n|.....\"\n3=====4"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "medium",
+  "filename": "bridges_7x7dm_98d15fca.txt",
+  "args": "7x7dm",
+  "problem": "3...3.3\n.......\n2.....2\n.......\n1...6.2\n.......\n.2..6.2",
+  "solution": "3---3-3\n\"...|.\"\n2...|.2\n....|..\n1---6=2\n....\"..\n.2==6=2"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "medium",
+  "filename": "bridges_7x7dm_c4439c2d.txt",
+  "args": "7x7dm",
+  "problem": "3.....3\n.......\n4..4..4\n.2..2..\n2......\n...1...\n.4..6.3",
+  "solution": "3=====3\n|.....|\n4--4==4\n\"2.|2.|\n2\".|\".|\n.\".1\".|\n.4==6=3"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "medium",
+  "filename": "bridges_7x7dm_5d7e81df.txt",
+  "args": "7x7dm",
+  "problem": ".2....3\n1......\n.1.4..3\n.......\n2..4.1.\n.......\n1.....2",
+  "solution": ".2====3\n1.....|\n|1-4--3\n|..\"..|\n2--4-1|\n......|\n1-----2"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "medium",
+  "filename": "bridges_7x7dm_24cecc91.txt",
+  "args": "7x7dm",
+  "problem": "3...3.2\n.3.2...\n3.....1\n...1...\n.......\n.4..4.1\n2....1.",
+  "solution": "3---3-2\n\"3-2|.|\n3\".||.1\n|\".1|..\n|\"..|..\n|4==4-1\n2----1."
+ },
+ {
+  "family": "bridges",
+  "difficulty": "hard",
+  "filename": "bridges_10x10dh_e91c08d0.txt",
+  "args": "10x10dh",
+  "problem": "2...5..3.3\n......1.1.\n..........\n2...5.3...\n.......1..\n......1...\n2.1.3...4.\n.........3\n1....2..2.\n..1......2",
+  "solution": "2===5--3-3\n....\".1|1\"\n....\".|||\"\n2---5-3||\"\n|...|.|1|\"\n|...|.1.|\"\n2-1.3===4\"\n........|3\n1----2--2|\n..1------2"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "hard",
+  "filename": "bridges_10x10dh_dbb54860.txt",
+  "args": "10x10dh",
+  "problem": "3..6..4.2.\n.........2\n.2.5.3....\n....2....4\n.1...2..1.\n....4.3...\n.3.5.....5\n..........\n.2........\n2..5.....4",
+  "solution": "3==6==4-2.\n|..\"..|.|2\n|2-5-3|.|\"\n||.|2\"|.|4\n|1.|\"2|.1\"\n|..|4=3..\"\n|3-5-----5\n|\".\".....\"\n|2.\".....\"\n2--5=====4"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "hard",
+  "filename": "bridges_10x10dh_9a2eb1a6.txt",
+  "args": "10x10dh",
+  "problem": ".1.4.4..4.\n..........\n3..3......\n.3...4..3.\n...2......\n........1.\n.4.6.5...2\n6.2.1.1...\n.1.2.1....\n4...4.3..2",
+  "solution": ".1-4-4==4.\n...\".|..\".\n3--3.|..\".\n\"3---4..3.\n\"\".2.\"..|.\n\"\".\".\"..1.\n\"4=6-5---2\n6=2|1|1..|\n\"1-2|1|..|\n4===4-3--2"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "hard",
+  "filename": "bridges_10x10dh_1e764d30.txt",
+  "args": "10x10dh",
+  "problem": ".2.......3\n3.5....2..\n..........\n..........\n..5......4\n..........\n..4...4.1.\n4....1....\n.1.2..3.1.\n4...4....3",
+  "solution": ".2=======3\n3=5====2.|\n|.|......|\n|.|......|\n|.5======4\n|.\"......|\n|.4===4-1|\n4----1|..|\n\"1-2--3-1|\n4===4====3"
+ },
+ {
+  "family": "bridges",
+  "difficulty": "hard",
+  "filename": "bridges_10x10dh_714c4838.txt",
+  "args": "10x10dh",
+  "problem": "2.2......3\n..........\n4.3....5.5\n.3.5.1....\n........1.\n...6...3..\n....2.6.3.\n.1........\n...4.2.1.2\n3...2.4.1.",
+  "solution": "2-2------3\n|........\"\n4-3====5=5\n\"3=5-1.|.|\n\"|.\"...|1|\n\"|.6===3||\n\"|.\"2=6=3|\n\"1.\"..\"..|\n\"..4=2\"1-2\n3---2-4-1."
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "easy",
+  "filename": "5x5_3c_5_3b79ecca.txt",
+  "args": null,
+  "problem": ".....\nB..C.\n...A.\n.A.B.\n....C",
+  "solution": "BBBBB\nBCCCB\nCCAAB\nCAABB\nCCCCC"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "easy",
+  "filename": "6x6_6c_6_f86ee188.txt",
+  "args": null,
+  "problem": "BD...E\n.ED.C.\n....A.\n......\nBAC...\nF....F",
+  "solution": "BDDEEE\nBEDECC\nBEEEAC\nBAAAAC\nBACCCC\nFFFFFF"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "easy",
+  "filename": "5x5_3c_1_87fc29c5.txt",
+  "args": null,
+  "problem": "...A.\n.C.B.\n..B..\n..C..\n....A",
+  "solution": "BBBAA\nBCBBA\nBCBBA\nBCCBA\nBBBBA"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "easy",
+  "filename": "5x5_5c_10_a482332b.txt",
+  "args": null,
+  "problem": "E.DA.\nC..B.\n.....\n..D..\nC.EBA",
+  "solution": "EEDAA\nCEDBA\nCEDBA\nCEDBA\nCEEBA"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "easy",
+  "filename": "5x5_5c_3_22075c83.txt",
+  "args": null,
+  "problem": "C...C\n..EDA\n.....\n.DEBA\n....B",
+  "solution": "CCCCC\nEEEDA\nEDDDA\nEDEBA\nEEEBB"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "medium",
+  "filename": "8x8_7c_5_0118fd6b.txt",
+  "args": null,
+  "problem": "........\nB.......\n........\n....A.F.\nF.A.....\nE.G..D.C\n...GD...\n....EB.C",
+  "solution": "BBBBBBBB\nBFFFFFFB\nFFGGGGFB\nFGGAAGFB\nFGAAGGBB\nEGGGGDBC\nEGGGDDBC\nEEEEEBBC"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "medium",
+  "filename": "7x7_5c_10_d45b6049.txt",
+  "args": null,
+  "problem": "......D\n.A.....\nD....C.\n..A....\n.......\n.E...B.\n.CBE...",
+  "solution": "DDDDDDD\nDAAAAAA\nDCCCCCA\nCCAAAAA\nCEEEEEE\nCEBBBBE\nCCBEEEE"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "medium",
+  "filename": "8x8_8c_9_3b537bc3.txt",
+  "args": null,
+  "problem": ".F.....H\n.E....A.\n....D.GA\n.......C\n.E...G..\n.BH..B..\n........\nFD...C..",
+  "solution": "FFHHHHHH\nFEHGGGAA\nFEHGDGGA\nFEHGDDDC\nFEHGGGDC\nFBHBBBDC\nFBBBDDDC\nFDDDDCCC"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "medium",
+  "filename": "8x8_6c_3_cade0083.txt",
+  "args": null,
+  "problem": "A.BC....\n..E...E.\n........\n...C....\n...F..D.\n........\n.BA....F\n.......D",
+  "solution": "ABBCCCCC\nABEEEEEC\nABDDDDDC\nABDCCCDC\nABDFFCDC\nABDDFCCC\nABADFFFF\nAAADDDDD"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "medium",
+  "filename": "8x8_8c_3_671c264d.txt",
+  "args": null,
+  "problem": ".H......\n.CB...C.\n....F...\n.G...BA.\n..H...D.\nEG...DF.\n.A......\n..E.....",
+  "solution": "HHBBBBBB\nHCBCCCCB\nHCCCFBBB\nHGGGFBAA\nHHHGFDDA\nEGGGFDFA\nEAAAFFFA\nEEEAAAAA"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "hard",
+  "filename": "9x9_8c_8_43f37569.txt",
+  "args": null,
+  "problem": ".....DA..\n...H...B.\n.....A...\n.........\nD...E..CH\nG........\n....B.EGC\n........F\n.......F.",
+  "solution": "DDDDDDAAA\nDHHHBBBBA\nDHBBBAAAA\nDHBHHHHHH\nDHBHEEECH\nGHBHHHECC\nGHBBBHEGC\nGHHHHHGGF\nGGGGGGGFF"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "hard",
+  "filename": "9x9_7c_4_207aef04.txt",
+  "args": null,
+  "problem": "E......G.\nB........\n.F..A.D..\n...B.....\n.........\n...C..D..\n.........\n...E...C.\n.F..AG...",
+  "solution": "EEEEEEEGG\nBBBBBBEEG\nFFAAABDEG\nFAABBBDEG\nFAEEEEDEG\nFAECCEDEG\nFAEECEEEG\nFAAECCCCG\nFFAAAGGGG"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "hard",
+  "filename": "9x9_8c_5_2af3ded9.txt",
+  "args": null,
+  "problem": "....F....\n.B.F..E.A\n.....C...\n.....G...\n.D.GH..C.\n.....B...\n..E.H...D\n.........\n.A.......",
+  "solution": "AAAFFAAAA\nABAFAAEEA\nABAAACCEE\nABBGGGCCE\nADBGHHHCE\nADBBBBHEE\nADEEHHHED\nADDEEEEED\nAADDDDDDD"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "hard",
+  "filename": "9x9_8c_1_55c4888b.txt",
+  "args": null,
+  "problem": "C........\n.......G.\n.....H.C.\n..F..D.E.\n.......H.\n.FB......\n.......A.\n.B...D..A\n......G.E",
+  "solution": "CCCCCCCCC\nGGGGGGGGC\nGBBBBHHCC\nGBFFBDHEE\nGBBFBDHHE\nGFBFBDEEE\nGFFFBDEAA\nGBBBBDEEA\nGGGGGGGEE"
+ },
+ {
+  "family": "flow_free",
+  "difficulty": "hard",
+  "filename": "9x9_9c_6_a4b5019b.txt",
+  "args": null,
+  "problem": "...AB...C\n...H.....\n..I....EB\n....C....\n.......G.\n.........\n..GF.FI..\n.H......E\n.AD.....D",
+  "solution": "AAAABCCCC\nAHHHBCBBB\nAHIBBCBEB\nAHIBCCBEE\nAHIBBBBGE\nAHIIIIIGE\nAHGFFFIGE\nAHGGGGGGE\nAADDDDDDD"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "easy",
+  "filename": "galaxies_5x5de_4782ed21.txt",
+  "args": "5x5de",
+  "problem": "+-+-+-+-+-+\n|o   o    |\n+ + + + + +\n|         |\n+ o + o +o+\n|         |\n+ + + + + +\n|         |\n+ + + + o +\n|  o      |\n+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+\n|o| |o|   |\n+-+ +-+ +-+\n|   |   | |\n+ o + o +o+\n|   |   | |\n+ +-+ +-+-+\n| |   |   |\n+-+-+-+ o +\n|  o  |   |\n+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "easy",
+  "filename": "galaxies_5x5de_1c714a44.txt",
+  "args": "5x5de",
+  "problem": "+-+-+-+-+-+\n|  o      |\n+ + +o+ + +\n|         |\n+ + + + + +\n|      o  |\n+ o + + + +\n|         |\n+ + +o+ +o+\n| o    o  |\n+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+\n| |o|     |\n+ +-+o+-+ +\n|     | | |\n+-+-+-+ +-+\n|   |  o  |\n+ o +-+ +-+\n|   | | | |\n+-+-+o+-+o+\n| o | |o| |\n+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "easy",
+  "filename": "galaxies_5x5de_5ef3fffb.txt",
+  "args": "5x5de",
+  "problem": "+-+-+-+-+-+\n|  o     o|\n+ + + + + +\n|o        |\n+ + o + + +\n|         |\n+ + + +o+ +\n|         |\n+ + + + +o+\n| o       |\n+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+\n| |o|   |o|\n+ +-+ +-+-+\n|o|   |   |\n+ + o + + +\n| |   |   |\n+-+ +-+o+-+\n|   |   | |\n+-+-+ + +o+\n| o |   | |\n+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "easy",
+  "filename": "galaxies_5x5de_97c6c97e.txt",
+  "args": "5x5de",
+  "problem": "+-+-+-+-+-+\n|o     o  |\n+ + + + + +\n|      o  |\n+ + +o+ + +\n|  o      |\n+ + + + + +\n|   o     |\n+o+ + + +o+\n|    o    |\n+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+\n|o| |  o  |\n+-+ +-+-+-+\n|     |o| |\n+ +-+o+-+ +\n| |o|     |\n+-+-+-+ +-+\n| | o | | |\n+o+-+-+-+o+\n| |  o  | |\n+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "easy",
+  "filename": "galaxies_5x5de_16dd3c71.txt",
+  "args": "5x5de",
+  "problem": "+-+-+-+-+-+\n| o      o|\n+ + +o+ + +\n|o        |\n+ + + + + +\n|     o   |\n+ + + + + +\n|o        |\n+ + + + o +\n|   o     |\n+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+\n| o |   |o|\n+-+-+o+-+-+\n|o|   |   |\n+-+-+-+ + +\n| |   o   |\n+ + + +-+-+\n|o|   |   |\n+ +-+-+ o +\n| | o |   |\n+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "medium",
+  "filename": "galaxies_7x7dm_82b6af84.txt",
+  "args": "7x7dm",
+  "problem": "+-+-+-+-+-+-+-+\n|  o   o    o |\n+ + + + + + + +\n|           o |\n+ + +o+ + + + +\n|             |\n+ + + + + + + +\n|          o  |\n+ + + + o + + +\n|    o        |\n+o+ + + + + + +\n|      o      |\n+ + + + + o + +\n|  o         o|\n+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+\n|  o  |o| | o |\n+-+-+-+-+ +-+-+\n|         | o |\n+ + +o+ + +-+-+\n|         |   |\n+ +-+-+-+-+-+ +\n| |       |o| |\n+-+ +-+ o +-+ +\n| | |o|       |\n+o+ +-+-+-+-+-+\n| |   |o|     |\n+-+-+-+-+ o +-+\n|  o  |     |o|\n+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "medium",
+  "filename": "galaxies_7x7dm_659074c8.txt",
+  "args": "7x7dm",
+  "problem": "+-+-+-+-+-+-+-+\n|             |\n+o+ + + + + o +\n|             |\n+ +o+ +o+ + + +\n|          o  |\n+ + + + + + + +\n|        o  o |\n+ + + + + + + +\n|             |\n+ + + + + + + +\n|o   o  o  o  |\n+ + + + + + + +\n|             |\n+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+\n| |   |   |   |\n+o+ + + + + o +\n| |   |   |   |\n+-+o+-+o+-+-+-+\n|   |   |  o  |\n+ + + + +-+-+-+\n|   |   |o| o |\n+-+-+-+-+-+-+-+\n| |           |\n+ + +-+ + +-+ +\n|o| |o| o |o| |\n+ + +-+ + +-+ +\n| |           |\n+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "medium",
+  "filename": "galaxies_7x7dm_7b8cef48.txt",
+  "args": "7x7dm",
+  "problem": "+-+-+-+-+-+-+-+\n|    o    o   |\n+ + + + + + + +\n|o o     o    |\n+ + + +o+ + + +\n|          o o|\n+ + + + + + + +\n|             |\n+ + + + + + + +\n|    o o o    |\n+ + + + + + + +\n|             |\n+ +o+ + + + + +\n|o     o    o |\n+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+\n| | |o|   o   |\n+ + +-+-+-+-+-+\n|o|o|   |o| | |\n+ + +-+o+-+ + +\n| | | |   |o|o|\n+-+-+ +-+-+ + +\n|         | | |\n+ + +-+ +-+-+-+\n|   |o|o|o|   |\n+-+-+-+ +-+ + +\n|   |         |\n+-+o+-+-+ +-+-+\n|o|   |o| | o |\n+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "medium",
+  "filename": "galaxies_7x7dm_99c8ddde.txt",
+  "args": "7x7dm",
+  "problem": "+-+-+-+-+-+-+-+\n|   o      o  |\n+ + + + + + + +\n|         o  o|\n+ + + +o+ + + +\n|o            |\n+ + + + + + + +\n|          o  |\n+ +o+ + + + + +\n|             |\n+ + + o + + + +\n|        o    |\n+ + + + + + o +\n|             |\n+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+\n|   o   | |o| |\n+-+-+-+-+ +-+ +\n| |   | | o |o|\n+ + + +o+-+ + +\n|o|   | | | | |\n+ + + +-+ +-+-+\n| |   | |  o  |\n+-+o+-+ +-+-+ +\n|   |   |   | |\n+ + + o + +-+-+\n|   |   |o|   |\n+ + + +-+ + o +\n|   | |   |   |\n+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "medium",
+  "filename": "galaxies_7x7dm_f5ac64df.txt",
+  "args": "7x7dm",
+  "problem": "+-+-+-+-+-+-+-+\n|           o |\n+ o + + + + + +\n|      o      |\n+ + + + +o+ + +\n|o         o  |\n+ + + + + + + +\n|      o      |\n+ +o+ + + + + +\n|             |\n+ + + + + + + +\n|     o  o   o|\n+ + + + + + + +\n|        o    |\n+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+\n|   |     | o |\n+ o + +-+ +-+-+\n|   | |o|     |\n+-+-+ +-+o+-+ +\n|o| |     |o| |\n+-+ +-+-+ +-+ +\n|     |o|     |\n+ +o+ +-+-+-+-+\n|     |     | |\n+-+ +-+ +-+ + +\n| | | o |o| |o|\n+ +-+ +-+-+-+ +\n|     |  o  | |\n+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "hard",
+  "filename": "galaxies_10x10dh_be0cc135.txt",
+  "args": "10x10dh",
+  "problem": "+-+-+-+-+-+-+-+-+-+-+\n| o                 |\n+ + +o+ + + + + o +o+\n|                   |\n+o+ + + + + + + + + +\n|        o o o      |\n+ + + + + + + + + + +\n|    o              |\n+ o + + + + + + + + +\n|                 o |\n+ + +o+ + + + +o+ + +\n|            o      |\n+ + + + + + + + + + +\n|o                o |\n+ + + o + +o+ o + + +\n|                   |\n+ + + + + + + + + + +\n|            o     o|\n+ + + +o+ + + + + + +\n| o  o       o      |\n+-+-+-+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+-+-+-+\n| o |   |     |   | |\n+-+-+o+-+ + + + o +o+\n| |   |       |   | |\n+o+-+-+ +-+ +-+-+-+-+\n| |     |o|o|o|     |\n+-+-+-+-+-+ +-+ +-+-+\n|   |o| |       |   |\n+ o +-+ + + + +-+ + +\n|   |   |     | | o |\n+-+-+o+-+-+-+-+o+ + +\n| |   |     |o| |   |\n+ + +-+ + +-+-+-+-+-+\n|o| |     | |   | o |\n+ +-+ o +-+o+ o +-+-+\n| |     | | |   | | |\n+-+ + +-+ +-+-+-+ + +\n|     | |    o    |o|\n+-+-+-+o+ +-+-+-+ + +\n| o |o| | |  o  | | |\n+-+-+-+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "hard",
+  "filename": "galaxies_10x10dh_2ddb4b86.txt",
+  "args": "10x10dh",
+  "problem": "+-+-+-+-+-+-+-+-+-+-+\n| o         o     o |\n+ + + + + + + + + + +\n|    o         o    |\n+ + + + + + + + + +o+\n|                   |\n+ + + + + + + + +o+ +\n|       o          o|\n+ + + + + + + + + + +\n|                   |\n+ + + + + + + + + o +\n|o           o      |\n+ + + + o + + + + + +\n|   o               |\n+ + + + + + + o + + +\n|      o            |\n+ + + + + + + + + + +\n| o       o    o   o|\n+ + + +o+ + + + + + +\n|    o     o        |\n+-+-+-+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+-+-+-+\n| o |     | o | | o |\n+-+-+ + + +-+-+ +-+-+\n|    o    | |  o  | |\n+ + + +-+-+ +-+ +-+o+\n|     |       | | | |\n+-+-+-+ + + + +-+o+-+\n|       o       | |o|\n+-+ + + + +-+-+-+-+-+\n| |       |     |   |\n+ +-+ +-+-+ +-+ + o +\n|o| | |   | |o| |   |\n+ + +-+ o + +-+ +-+-+\n| | o |   |         |\n+-+-+ +-+-+ + o + +-+\n|   | |o|         | |\n+ + +-+-+-+-+ +-+ + +\n| o |   | o | |o| |o|\n+ + +-+o+-+-+ +-+ + +\n|   |o|   |o|     | |\n+-+-+-+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "hard",
+  "filename": "galaxies_10x10dh_087062d9.txt",
+  "args": "10x10dh",
+  "problem": "+-+-+-+-+-+-+-+-+-+-+\n|          o        |\n+o+ + + + + + + + +o+\n|  o   o            |\n+ + + + + + + + +o+ +\n|         o        o|\n+ + +o+ + + + o + + +\n|          o        |\n+ + + + + + + + + + +\n|o                  |\n+ +o+ + + + + + + + +\n|               o   |\n+ + + + + + + + + + +\n|                   |\n+ + + o +o+o+ + + + +\n|             o    o|\n+ o + + + + + + +o+ +\n|    o              |\n+ + + + + + + + + + +\n|o     o            |\n+-+-+-+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+-+-+-+\n| |   | |  o  |   | |\n+o+ +-+ +-+-+-+-+ +o+\n| |o|  o  |   | | | |\n+-+ +-+ +-+ +-+ +o+-+\n|   | | | o |   | |o|\n+-+-+o+-+ +-+ o + +-+\n| | | |   |o|   |   |\n+ + +-+-+-+-+ +-+-+-+\n|o| |       | |     |\n+ +o+-+ + + +-+ + +-+\n| | | |       | o | |\n+-+ + +-+-+ +-+ + + +\n| | |   | | |     | |\n+ +-+ o +o+o+-+-+-+ +\n|   |   | | | o | |o|\n+ o +-+ +-+ +-+-+o+ +\n|   |o| |       | | |\n+-+ +-+-+-+ + + +-+ +\n|o| |  o  |       | |\n+-+-+-+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "hard",
+  "filename": "galaxies_10x10dh_005de3c6.txt",
+  "args": "10x10dh",
+  "problem": "+-+-+-+-+-+-+-+-+-+-+\n|o                  |\n+ + + + + +o+ + + + +\n|                   |\n+ + +o+ + + + + + + +\n|                o  |\n+o+ + + + + + + + + +\n|          o        |\n+ + + + + + + + + + +\n|  o         o      |\n+ + + + + + + + + + +\n|    o        o    o|\n+ + + + + + + + + + +\n|o                  |\n+ + + + o + + + o + +\n|                  o|\n+ + + + + + + + + + +\n|        o          |\n+ +o+ + + + +o+ + o +\n|o       o          |\n+-+-+-+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+-+-+-+\n|o|     |     |     |\n+-+ + + + +o+ + + + +\n|       |     |     |\n+-+ +o+ +-+-+-+ + + +\n| |       |   |  o  |\n+o+ + + +-+ + + + + +\n| |     |  o  |     |\n+-+-+-+-+ + +-+ + + +\n|  o  | |   |o|     |\n+-+-+-+ +-+-+-+-+-+-+\n| |  o  |   | o | |o|\n+ + +-+-+ + +-+-+ +-+\n|o| |         |     |\n+ +-+ + o + +-+ o +-+\n| |         |     |o|\n+-+-+ + +-+-+-+ +-+-+\n|   |   |o|   | |   |\n+-+o+-+-+-+-+o+-+ o +\n|o|   |  o  |   |   |\n+-+-+-+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "galaxies",
+  "difficulty": "hard",
+  "filename": "galaxies_10x10dh_bfdcd141.txt",
+  "args": "10x10dh",
+  "problem": "+-+-+-+-+-+-+-+-+-+-+\n|  o     o         o|\n+ + + + + + +o+ + + +\n|o                  |\n+ + + + + + + + + o +\n|           o       |\n+ o + + + + + + + + +\n|    o          o   |\n+ + + + + + + + + + +\n|      o       o   o|\n+ + + + +o+ + + + + +\n|o                  |\n+ +o+ + + + + +o+ + +\n|          o        |\n+ + + + + + + + + + +\n|     o             |\n+ + + + + + + + + + +\n|                o  |\n+ + o + +o+ + + + + +\n|              o    |\n+-+-+-+-+-+-+-+-+-+-+",
+  "solution": "+-+-+-+-+-+-+-+-+-+-+\n|  o  | |o|       |o|\n+-+-+-+ +-+ +o+ +-+-+\n|o| |   |       |   |\n+-+ + + +-+-+-+-+ o +\n|   |     | o | |   |\n+ o +-+-+ +-+-+ +-+-+\n|   |o| |     | o | |\n+ +-+-+ + +-+-+-+ + +\n| |   |o| |   |o| |o|\n+-+ + + +o+ + +-+-+ +\n|o|   | | |       | |\n+-+o+-+-+ +-+ +o+ +-+\n|   |     |o|       |\n+ + +-+-+ +-+-+-+ + +\n|   | o |     | |   |\n+-+-+-+-+-+ + + +-+-+\n|       | |   |  o  |\n+ + o + +o+ +-+-+-+ +\n|       | | |  o  | |\n+-+-+-+-+-+-+-+-+-+-+"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "easy",
+  "filename": "loopy_5x5de_c90e485f.txt",
+  "args": "5x5de",
+  "problem": "+++++++++++++\n+           +\n+   1 2   3 +\n+           +\n+   1 0     +\n+           +\n+ 3 0 1   3 +\n+           +\n+         3 +\n+           +\n+ 3       2 +\n+           +\n+++++++++++++",
+  "solution": "+++++++++++++\n+ - - - x - +\n+| x1x2| |3|+\n+ - x x - x +\n+x |1x0x x |+\n+ - x x x - +\n+|3x0x1x |3x+\n+ - x - x - +\n+x | | | x3|+\n+ - x x x - +\n+|3x | | |2x+\n+ - - x - x +\n+++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "easy",
+  "filename": "loopy_5x5de_6dd0e857.txt",
+  "args": "5x5de",
+  "problem": "+++++++++++++\n+           +\n+   3   3   +\n+           +\n+ 3       1 +\n+           +\n+   3   3 1 +\n+           +\n+ 2   0   2 +\n+           +\n+     3 3   +\n+           +\n+++++++++++++",
+  "solution": "+++++++++++++\n+ x - x - x +\n+x |3| |3| x+\n+ - x - x x +\n+|3x x x |1x+\n+ - - x - x +\n+x x3| |3x1x+\n+ - - x - - +\n+|2x x0x x2|+\n+ x - x - x +\n+| | |3|3| |+\n+ - x - x - +\n+++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "easy",
+  "filename": "loopy_5x5de_62a72b3f.txt",
+  "args": "5x5de",
+  "problem": "+++++++++++++\n+           +\n+           +\n+           +\n+ 3 1 2 3 2 +\n+           +\n+ 3 0   2 2 +\n+           +\n+     3     +\n+           +\n+ 3       3 +\n+           +\n+++++++++++++",
+  "solution": "+++++++++++++\n+ - - x x - +\n+| x | x | |+\n+ - x - x x +\n+x3|1x2|3|2|+\n+ - x x - x +\n+|3x0x x2x2|+\n+ - x - - - +\n+x | |3x x x+\n+ - x - - - +\n+|3x x x x3|+\n+ - - - - - +\n+++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "easy",
+  "filename": "loopy_5x5de_d2edcce9.txt",
+  "args": "5x5de",
+  "problem": "+++++++++++++\n+           +\n+ 3       3 +\n+           +\n+   3       +\n+           +\n+ 2     0 3 +\n+           +\n+ 1   3   3 +\n+           +\n+ 3   1 2   +\n+           +\n+++++++++++++",
+  "solution": "+++++++++++++\n+ - - - - - +\n+|3x x x x3|+\n+ - - x x - +\n+x x3| x | x+\n+ - - x x - +\n+|2x x x0x3|+\n+ x x - x - +\n+|1x |3| |3x+\n+ x - x x - +\n+|3| x1|2x |+\n+ - x x - - +\n+++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "easy",
+  "filename": "loopy_5x5de_dcab4893.txt",
+  "args": "5x5de",
+  "problem": "+++++++++++++\n+           +\n+   3     3 +\n+           +\n+   0       +\n+           +\n+   2       +\n+           +\n+ 2 0     1 +\n+           +\n+   1   3 3 +\n+           +\n+++++++++++++",
+  "solution": "+++++++++++++\n+ x - x x - +\n+x |3| x |3|+\n+ - x - x x +\n+| x0x | | |+\n+ - x - x x +\n+x |2| x | |+\n+ - x - - x +\n+|2x0x x x1|+\n+ x x x - x +\n+| x1x |3|3|+\n+ - - - x - +\n+++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "medium",
+  "filename": "loopy_7x7dm_37050b65.txt",
+  "args": "7x7dm",
+  "problem": "+++++++++++++++++\n+               +\n+ 3   2 2 3 3   +\n+               +\n+     2 3       +\n+               +\n+ 3     1   3   +\n+               +\n+ 2       2 2   +\n+               +\n+ 3 2 2 1       +\n+               +\n+   2   2   1 2 +\n+               +\n+ 3 2     1 1 3 +\n+               +\n+++++++++++++++++",
+  "solution": "+++++++++++++++++\n+ - - - x - x - +\n+|3x x2|2|3|3| |+\n+ - - x x x - x +\n+x x |2|3| x x |+\n+ - - x - x - x +\n+|3x x x1x |3| |+\n+ - - - x x x x +\n+x2x x | x2|2| |+\n+ - - - x - x x +\n+|3x2x2x1| x | |+\n+ - - - x x x x +\n+x x2x |2| x1|2|+\n+ - - - x x x x +\n+|3x2x x |1x1|3|+\n+ - - - - x x - +\n+++++++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "medium",
+  "filename": "loopy_7x7dm_6e7d3566.txt",
+  "args": "7x7dm",
+  "problem": "+++++++++++++++++\n+               +\n+   3   2     3 +\n+               +\n+ 1         3   +\n+               +\n+ 2   1 1     3 +\n+               +\n+ 2         2 2 +\n+               +\n+ 3 1     3     +\n+               +\n+ 3   3     1   +\n+               +\n+ 3     3 3   3 +\n+               +\n+++++++++++++++++",
+  "solution": "+++++++++++++++++\n+ - x - x - - - +\n+| |3| |2| x x3|+\n+ x - x x x - - +\n+|1x x | | |3x x+\n+ x x x - x - - +\n+|2x x1x1x x x3|+\n+ - - - x - - - +\n+x2x x | | x2x2x+\n+ - - - x x - - +\n+|3x1x x |3| x |+\n+ - x - x - x - +\n+x3| |3| x x1| x+\n+ - x x x - x - +\n+|3x | |3|3| x3|+\n+ - - x - x - - +\n+++++++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "medium",
+  "filename": "loopy_7x7dm_de5a9374.txt",
+  "args": "7x7dm",
+  "problem": "+++++++++++++++++\n+               +\n+ 3       1   3 +\n+               +\n+   3   3 2   2 +\n+               +\n+ 3     1       +\n+               +\n+ 3 2   1   2   +\n+               +\n+ 2   2         +\n+               +\n+   1 2   1 2 1 +\n+               +\n+   1 3   1 2   +\n+               +\n+++++++++++++++++",
+  "solution": "+++++++++++++++++\n+ - - - x x x - +\n+|3x x | x1x |3|+\n+ - - x x - - x +\n+x x3| |3|2x x2|+\n+ - - x - x - - +\n+|3x x x1x | x x+\n+ - x - x x - - +\n+x3|2| |1x x2x |+\n+ - x x x - - x +\n+|2x |2| | x | |+\n+ x x x - x - x +\n+| x1|2x x1|2x1|+\n+ x x - x x x x +\n+| x1x3| x1|2x |+\n+ - - - x x - - +\n+++++++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "medium",
+  "filename": "loopy_7x7dm_c635c6e9.txt",
+  "args": "7x7dm",
+  "problem": "+++++++++++++++++\n+               +\n+     2 1   2   +\n+               +\n+ 2 2 3       1 +\n+               +\n+ 2     2     2 +\n+               +\n+     3 1 1     +\n+               +\n+ 2   2 2     1 +\n+               +\n+ 2   3 3 2     +\n+               +\n+     1   1 2 3 +\n+               +\n+++++++++++++++++",
+  "solution": "+++++++++++++++++\n+ - - - - - - - +\n+| x x2x1x x2x |+\n+ x x - x - - - +\n+|2x2|3| | x x1x+\n+ - - x x x - x +\n+x2x x |2| | |2x+\n+ - x - x - x - +\n+| | |3x1x1x x |+\n+ x x - - x - - +\n+|2| x2x2| | x1x+\n+ x x - x x x x +\n+|2| |3|3|2| x x+\n+ x - x - x - - +\n+| x x1x x1x2x3|+\n+ - - - - - - - +\n+++++++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "medium",
+  "filename": "loopy_7x7dm_31ee9beb.txt",
+  "args": "7x7dm",
+  "problem": "+++++++++++++++++\n+               +\n+ 3   2 2     0 +\n+               +\n+   3   1     2 +\n+               +\n+ 3         2 2 +\n+               +\n+     2   0     +\n+               +\n+ 3           3 +\n+               +\n+ 3 2       1 2 +\n+               +\n+   2           +\n+               +\n+++++++++++++++++",
+  "solution": "+++++++++++++++++\n+ - - - x x x x +\n+|3x x2|2x x x0x+\n+ - - x - - - x +\n+x x3| x1x x |2x+\n+ - - x x - x - +\n+|3x x x | |2x2|+\n+ - - x - x - x +\n+x x |2| x0x | |+\n+ - - x - x x x +\n+|3x x x | x |3|+\n+ - x - x x x - +\n+x3|2| | | x1x2x+\n+ - x x x - - - +\n+| x2| | x x x |+\n+ - - x - - - - +\n+++++++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "hard",
+  "filename": "loopy_10x10dh_61183860.txt",
+  "args": "10x10dh",
+  "problem": "+++++++++++++++++++++++\n+                     +\n+ 3     2 1       2 3 +\n+                     +\n+   2 1       3 1 1   +\n+                     +\n+ 2     2           2 +\n+                     +\n+   1   2 1 2 3 1     +\n+                     +\n+   1 1       3 1     +\n+                     +\n+ 2 1 3               +\n+                     +\n+   2   2 3         3 +\n+                     +\n+ 1 2     2 1       2 +\n+                     +\n+           2 1 0     +\n+                     +\n+   2 2 2     3     2 +\n+                     +\n+++++++++++++++++++++++",
+  "solution": "+++++++++++++++++++++++\n+ - x - x x - - - x - +\n+|3| | |2x1| x x |2|3|+\n+ x x x - x x - - x x +\n+| |2|1x | | |3x1x1| |+\n+ x x x - x x - x x x +\n+|2| | |2x | x | x |2|+\n+ x - x x x x - x - x +\n+| x1x |2x1|2|3x1| x |+\n+ - x x - x x - x - x +\n+x |1x1x | | x3|1x | |+\n+ - x - x - x - x - x +\n+|2x1|3| x x | x | x |+\n+ x x x x - x - - x - +\n+| x2| |2|3| x x x |3x+\n+ - - x x x - - - x - +\n+x1x2x | |2x1x x | x2|+\n+ x - - x - x x x - x +\n+x | x x x |2x1x0x | |+\n+ - x - - x - - x - x +\n+| x2|2x2| x x3| | x2|+\n+ - - x x - - - x - - +\n+++++++++++++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "hard",
+  "filename": "loopy_10x10dh_5460cf15.txt",
+  "args": "10x10dh",
+  "problem": "+++++++++++++++++++++++\n+                     +\n+       2   3       3 +\n+                     +\n+   2 2   2   2   2 3 +\n+                     +\n+     1   2 3 1       +\n+                     +\n+   2   1   2 1     1 +\n+                     +\n+   2     3         2 +\n+                     +\n+     2 1 2 2 3   1   +\n+                     +\n+ 2 2       2   2 2   +\n+                     +\n+     2 1   2   3 0   +\n+                     +\n+ 2     1   2         +\n+                     +\n+ 3   1   2 2 2 3   3 +\n+                     +\n+++++++++++++++++++++++",
+  "solution": "+++++++++++++++++++++++\n+ - - - - x - x x - - +\n+| x x x2| |3| x | x3|+\n+ x - - x - x - x x - +\n+| |2x2| x2x x2| |2|3x+\n+ - x x - - - x - x - +\n+x x x1x x2x3|1x x x |+\n+ - - - - - - x - - - +\n+| x2x x1x x2x1| x x1x+\n+ x - - x - - x - - x +\n+| |2x | |3x | x x |2x+\n+ - x - x - x x - x - +\n+x x |2x1x2|2|3| |1x |+\n+ x - x - x x - x x - +\n+x2|2x | | |2x x2|2| x+\n+ - x - x x - x - x - +\n+| x |2x1| x2| |3x0x |+\n+ x - x x - x x - x - +\n+|2| x x1x |2| x | | x+\n+ x x x - - x x - x - +\n+|3| x1| x2x2|2|3x x3|+\n+ - x x - - - x - - - +\n+++++++++++++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "hard",
+  "filename": "loopy_10x10dh_fe5cd01c.txt",
+  "args": "10x10dh",
+  "problem": "+++++++++++++++++++++++\n+                     +\n+   3   2 1 1 2 2   3 +\n+                     +\n+   1 1   2 1   2     +\n+                     +\n+   3       2 3   1   +\n+                     +\n+     1     1     3 2 +\n+                     +\n+   2 1   1 1 3     1 +\n+                     +\n+     2   0       3   +\n+                     +\n+   3   2 1   2       +\n+                     +\n+ 2   1       0     2 +\n+                     +\n+ 3 3   3 1       3   +\n+                     +\n+     2     3     2 3 +\n+                     +\n+++++++++++++++++++++++",
+  "solution": "+++++++++++++++++++++++\n+ - x - x x x x - - - +\n+| |3| |2x1x1x2|2x x3|+\n+ x - x - - - - x - - +\n+| x1x1x x2x1x x2| x x+\n+ - x - - - x - - x - +\n+x |3| x x |2|3x x1| |+\n+ x - x - - x - - x x +\n+x x x1| x x1x x |3|2|+\n+ - x x - - - - x - x +\n+| |2x1x x1x1x3| x x1|+\n+ x - - x x x - x - x +\n+| x x2| x0x | x |3| |+\n+ x - x x x x x - x - +\n+| |3| |2x1x |2| x x x+\n+ - x x - - - x - - - +\n+x2x |1x x x x0x x x2|+\n+ - x x - x x x x - x +\n+|3|3| |3|1x x x |3| |+\n+ x - x x x - x x x x +\n+| x x2| | |3| x |2|3|+\n+ - - - x - x - - x - +\n+++++++++++++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "hard",
+  "filename": "loopy_10x10dh_b015c646.txt",
+  "args": "10x10dh",
+  "problem": "+++++++++++++++++++++++\n+                     +\n+ 3 2 2   2         3 +\n+                     +\n+ 2         2   2 3   +\n+                     +\n+ 2     2 3 1   0   2 +\n+                     +\n+ 2   2 2   3       2 +\n+                     +\n+ 3         2 1   1 3 +\n+                     +\n+   3   2     2   2   +\n+                     +\n+     1 2   3 1 1 3   +\n+                     +\n+     2       2       +\n+                     +\n+ 2   1   1 3         +\n+                     +\n+     1 1 2   3   2 2 +\n+                     +\n+++++++++++++++++++++++",
+  "solution": "+++++++++++++++++++++++\n+ - x - - x - x - x - +\n+|3|2|2x |2| | | | |3|+\n+ x x x - x x x x x x +\n+|2| | | x |2| |2|3| |+\n+ x - x x - x - x - x +\n+|2x x |2|3x1x x0x x2|+\n+ - - x x - - x x - - +\n+x2x |2|2x x3| x | x2x+\n+ - - x - x - x x - - +\n+|3x x x | |2x1x x1x3|+\n+ - x - x - x - - x - +\n+x |3| |2x x |2x |2| x+\n+ x - x - x - x x x x +\n+x x x1x2| |3x1x1|3| x+\n+ - - - x x - - x - x +\n+| x x2| | x x2| x x x+\n+ - - x - x - x - - - +\n+x2x |1x x1|3| x x x |+\n+ - - x x x x x - x x +\n+| x x1x1x2| |3| |2x2|+\n+ - - - - - x - x - - +\n+++++++++++++++++++++++"
+ },
+ {
+  "family": "loopy",
+  "difficulty": "hard",
+  "filename": "loopy_10x10dh_35065968.txt",
+  "args": "10x10dh",
+  "problem": "+++++++++++++++++++++++\n+                     +\n+   2 2 3 3   3     1 +\n+                     +\n+   2 3       1     3 +\n+                     +\n+   0     2       1 1 +\n+                     +\n+     1   2 3   2     +\n+                     +\n+ 2 2           2     +\n+                     +\n+ 3   2   2 2 1 3 2   +\n+                     +\n+ 3   1   2 3 1 2     +\n+                     +\n+     2 2 2           +\n+                     +\n+   2 2       3 2   3 +\n+                     +\n+ 3 2 2 2   2   2 3   +\n+                     +\n+++++++++++++++++++++++",
+  "solution": "+++++++++++++++++++++++\n+ - - x - x - x - x x +\n+| x2|2|3|3| |3| | x1x+\n+ - x x x - x - x - - +\n+x |2|3| x x x1x x x3|+\n+ - x - x - - x - - - +\n+| x0x x |2x | | x1x1x+\n+ - x x x x - x x x x +\n+x | x1x |2|3x |2x x x+\n+ x x - - x - x - - - +\n+x2|2| x x x | x2x x |+\n+ - x x - - - x - - x +\n+|3x |2| x2x2x1|3x2| |+\n+ - x x - - - x - x - +\n+x3| |1x x2x3|1x2| x x+\n+ - x x - - - x x - x +\n+| x |2|2x2x x x x | x+\n+ - - x x - x - - x - +\n+x x2x2| | | |3x2| x3|+\n+ - - - x x x - x x - +\n+|3x2x2x2| |2x |2|3| x+\n+ - - - - x - - x - x +\n+++++++++++++++++++++++"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "easy",
+  "filename": "pattern_5x5de_98df5b16.txt",
+  "args": "5x5de",
+  "problem": "                 2 \n     4  2  2  1  1 \n   +--+--+--+--+--+\n  3|  |  |  |  |  |\n   +--+--+--+--+--+\n3 1|  |  |  |  |  |\n   +--+--+--+--+--+\n  2|  |  |  |  |  |\n   +--+--+--+--+--+\n  1|  |  |  |  |  |\n   +--+--+--+--+--+\n1 1|  |  |  |  |  |\n   +--+--+--+--+--+",
+  "solution": "                 2 \n     4  2  2  1  1 \n   +--+--+--+--+--+\n  3|..|..|##|##|##|\n   +--+--+--+--+--+\n3 1|##|##|##|..|##|\n   +--+--+--+--+--+\n  2|##|##|..|..|..|\n   +--+--+--+--+--+\n  1|##|..|..|..|..|\n   +--+--+--+--+--+\n1 1|##|..|..|..|##|\n   +--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "easy",
+  "filename": "pattern_5x5de_a028d637.txt",
+  "args": "5x5de",
+  "problem": "        1          \n     4  3  2  1  1 \n   +--+--+--+--+--+\n1 2|  |  |  |  |  |\n   +--+--+--+--+--+\n  1|  |  |  |  |  |\n   +--+--+--+--+--+\n  2|  |  |  |  |  |\n   +--+--+--+--+--+\n  3|  |  |  |  |  |\n   +--+--+--+--+--+\n  3|  |  |  |  |  |\n   +--+--+--+--+--+",
+  "solution": "        1          \n     4  3  2  1  1 \n   +--+--+--+--+--+\n1 2|..|##|..|##|##|\n   +--+--+--+--+--+\n  1|##|..|..|..|..|\n   +--+--+--+--+--+\n  2|##|##|..|..|..|\n   +--+--+--+--+--+\n  3|##|##|##|..|..|\n   +--+--+--+--+--+\n  3|##|##|##|..|..|\n   +--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "easy",
+  "filename": "pattern_5x5de_15204aac.txt",
+  "args": "5x5de",
+  "problem": "              1    \n     4  3  1  1  3 \n   +--+--+--+--+--+\n  4|  |  |  |  |  |\n   +--+--+--+--+--+\n  2|  |  |  |  |  |\n   +--+--+--+--+--+\n2 1|  |  |  |  |  |\n   +--+--+--+--+--+\n1 1|  |  |  |  |  |\n   +--+--+--+--+--+\n  2|  |  |  |  |  |\n   +--+--+--+--+--+",
+  "solution": "              1    \n     4  3  1  1  3 \n   +--+--+--+--+--+\n  4|##|##|##|##|..|\n   +--+--+--+--+--+\n  2|##|##|..|..|..|\n   +--+--+--+--+--+\n2 1|##|##|..|..|##|\n   +--+--+--+--+--+\n1 1|##|..|..|..|##|\n   +--+--+--+--+--+\n  2|..|..|..|##|##|\n   +--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "easy",
+  "filename": "pattern_5x5de_da7af9b5.txt",
+  "args": "5x5de",
+  "problem": "        1     1  1 \n     3  1  2  1  2 \n   +--+--+--+--+--+\n  3|  |  |  |  |  |\n   +--+--+--+--+--+\n  2|  |  |  |  |  |\n   +--+--+--+--+--+\n  1|  |  |  |  |  |\n   +--+--+--+--+--+\n2 1|  |  |  |  |  |\n   +--+--+--+--+--+\n1 2|  |  |  |  |  |\n   +--+--+--+--+--+",
+  "solution": "        1     1  1 \n     3  1  2  1  2 \n   +--+--+--+--+--+\n  3|..|..|##|##|##|\n   +--+--+--+--+--+\n  2|..|##|##|..|..|\n   +--+--+--+--+--+\n  1|##|..|..|..|..|\n   +--+--+--+--+--+\n2 1|##|##|..|..|##|\n   +--+--+--+--+--+\n1 2|##|..|..|##|##|\n   +--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "easy",
+  "filename": "pattern_5x5de_5f207763.txt",
+  "args": "5x5de",
+  "problem": "           1     1 \n     3  2  1  2  2 \n   +--+--+--+--+--+\n  3|  |  |  |  |  |\n   +--+--+--+--+--+\n2 1|  |  |  |  |  |\n   +--+--+--+--+--+\n  1|  |  |  |  |  |\n   +--+--+--+--+--+\n  2|  |  |  |  |  |\n   +--+--+--+--+--+\n  3|  |  |  |  |  |\n   +--+--+--+--+--+",
+  "solution": "           1     1 \n     3  2  1  2  2 \n   +--+--+--+--+--+\n  3|##|##|##|..|..|\n   +--+--+--+--+--+\n2 1|##|##|..|..|##|\n   +--+--+--+--+--+\n  1|##|..|..|..|..|\n   +--+--+--+--+--+\n  2|..|..|..|##|##|\n   +--+--+--+--+--+\n  3|..|..|##|##|##|\n   +--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "medium",
+  "filename": "pattern_7x7dm_b0646aba.txt",
+  "args": "7x7dm",
+  "problem": "               1       \n   5  5  5  3  2  2  1 \n +--+--+--+--+--+--+--+\n3|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n5|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n4|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n4|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n3|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n2|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n3|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+",
+  "solution": "               1       \n   5  5  5  3  2  2  1 \n +--+--+--+--+--+--+--+\n3|##|##|##|..|..|..|..|\n +--+--+--+--+--+--+--+\n5|##|##|##|##|##|..|..|\n +--+--+--+--+--+--+--+\n4|##|##|##|##|..|..|..|\n +--+--+--+--+--+--+--+\n4|##|##|##|##|..|..|..|\n +--+--+--+--+--+--+--+\n3|##|##|##|..|..|..|..|\n +--+--+--+--+--+--+--+\n2|..|..|..|..|##|##|..|\n +--+--+--+--+--+--+--+\n3|..|..|..|..|##|##|##|\n +--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "medium",
+  "filename": "pattern_7x7dm_8ba4dcd7.txt",
+  "args": "7x7dm",
+  "problem": "     2  1                \n     2  2  4  2  4  3  4 \n   +--+--+--+--+--+--+--+\n  2|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n  1|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n  2|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n1 3|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n1 3|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n5 1|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n  5|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+",
+  "solution": "     2  1                \n     2  2  4  2  4  3  4 \n   +--+--+--+--+--+--+--+\n  2|##|##|..|..|..|..|..|\n   +--+--+--+--+--+--+--+\n  1|##|..|..|..|..|..|..|\n   +--+--+--+--+--+--+--+\n  2|..|..|..|..|..|##|##|\n   +--+--+--+--+--+--+--+\n1 3|..|..|##|..|##|##|##|\n   +--+--+--+--+--+--+--+\n1 3|..|..|##|..|##|##|##|\n   +--+--+--+--+--+--+--+\n5 1|##|##|##|##|##|..|##|\n   +--+--+--+--+--+--+--+\n  5|##|##|##|##|##|..|..|\n   +--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "medium",
+  "filename": "pattern_7x7dm_0beb9c48.txt",
+  "args": "7x7dm",
+  "problem": "     3  2  1             \n     1  3  3  4  3  3  2 \n   +--+--+--+--+--+--+--+\n3 1|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n2 2|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n1 1|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n  3|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n  4|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n  4|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+\n  4|  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+",
+  "solution": "     3  2  1             \n     1  3  3  4  3  3  2 \n   +--+--+--+--+--+--+--+\n3 1|##|##|##|..|..|..|##|\n   +--+--+--+--+--+--+--+\n2 2|##|##|..|..|..|##|##|\n   +--+--+--+--+--+--+--+\n1 1|##|..|..|..|..|##|..|\n   +--+--+--+--+--+--+--+\n  3|..|..|..|##|##|##|..|\n   +--+--+--+--+--+--+--+\n  4|..|##|##|##|##|..|..|\n   +--+--+--+--+--+--+--+\n  4|..|##|##|##|##|..|..|\n   +--+--+--+--+--+--+--+\n  4|##|##|##|##|..|..|..|\n   +--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "medium",
+  "filename": "pattern_7x7dm_b58a2865.txt",
+  "args": "7x7dm",
+  "problem": "   2  3  4  5  3  3  4 \n +--+--+--+--+--+--+--+\n1|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n3|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n4|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n5|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n3|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n4|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+\n4|  |  |  |  |  |  |  |\n +--+--+--+--+--+--+--+",
+  "solution": "   2  3  4  5  3  3  4 \n +--+--+--+--+--+--+--+\n1|..|..|..|..|..|..|##|\n +--+--+--+--+--+--+--+\n3|..|..|..|..|##|##|##|\n +--+--+--+--+--+--+--+\n4|..|..|..|##|##|##|##|\n +--+--+--+--+--+--+--+\n5|..|..|##|##|##|##|##|\n +--+--+--+--+--+--+--+\n3|..|##|##|##|..|..|..|\n +--+--+--+--+--+--+--+\n4|##|##|##|##|..|..|..|\n +--+--+--+--+--+--+--+\n4|##|##|##|##|..|..|..|\n +--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "medium",
+  "filename": "pattern_7x7dm_be7de8ae.txt",
+  "args": "7x7dm",
+  "problem": "                1          \n       3  3  1  1          \n       2  1  3  1  1  1  6 \n     +--+--+--+--+--+--+--+\n  2 1|  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+\n  2 1|  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+\n  4 2|  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+\n    1|  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+\n  2 1|  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+\n1 1 1|  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+\n3 1 1|  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+",
+  "solution": "                1          \n       3  3  1  1          \n       2  1  3  1  1  1  6 \n     +--+--+--+--+--+--+--+\n  2 1|##|##|..|##|..|..|..|\n     +--+--+--+--+--+--+--+\n  2 1|##|##|..|..|..|..|##|\n     +--+--+--+--+--+--+--+\n  4 2|##|##|##|##|..|##|##|\n     +--+--+--+--+--+--+--+\n    1|..|..|..|..|..|..|##|\n     +--+--+--+--+--+--+--+\n  2 1|..|..|##|##|..|..|##|\n     +--+--+--+--+--+--+--+\n1 1 1|##|..|##|..|..|..|##|\n     +--+--+--+--+--+--+--+\n3 1 1|##|##|##|..|##|..|##|\n     +--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "hard",
+  "filename": "pattern_10x10dh_9c7d7e1b.txt",
+  "args": "10x10dh",
+  "problem": "                       4          \n     2  6  3        1  1  3  2  1 \n     3  1  1  1  2  4  1  5  4  5 \n   +--+--+--+--+--+--+--+--+--+--+\n3 5|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n3 3|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n2 2|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n2 2|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n6 1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n2 6|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n1 3|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  3|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  3|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n1 2|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+",
+  "solution": "                       4          \n     2  6  3        1  1  3  2  1 \n     3  1  1  1  2  4  1  5  4  5 \n   +--+--+--+--+--+--+--+--+--+--+\n3 5|##|##|##|..|..|##|##|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n3 3|##|##|##|..|..|..|##|##|##|..|\n   +--+--+--+--+--+--+--+--+--+--+\n2 2|..|##|##|..|..|..|##|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n2 2|##|##|..|..|..|##|##|..|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n6 1|##|##|##|##|##|##|..|..|..|##|\n   +--+--+--+--+--+--+--+--+--+--+\n2 6|##|##|..|..|##|##|##|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n1 3|..|..|..|..|..|##|..|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n  3|..|..|..|..|..|..|..|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n  3|..|..|..|..|..|..|..|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n1 2|..|##|..|..|..|..|##|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "hard",
+  "filename": "pattern_10x10dh_a4952b90.txt",
+  "args": "10x10dh",
+  "problem": "                    2             \n                    1  3          \n              1     1  1          \n     3  3  5  3  7  1  1  7  5  6 \n   +--+--+--+--+--+--+--+--+--+--+\n  3|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n2 1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n1 2|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  6|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n1 4|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  8|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n3 3|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n4 3|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n3 1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n3 2|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+",
+  "solution": "                    2             \n                    1  3          \n              1     1  1          \n     3  3  5  3  7  1  1  7  5  6 \n   +--+--+--+--+--+--+--+--+--+--+\n  3|..|..|..|##|##|##|..|..|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n2 1|..|..|..|..|##|##|..|..|..|##|\n   +--+--+--+--+--+--+--+--+--+--+\n1 2|..|..|..|..|##|..|..|..|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n  6|..|..|..|..|##|##|##|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n1 4|..|..|..|..|##|..|##|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n  8|..|..|##|##|##|##|##|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n3 3|..|..|##|##|##|..|..|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n4 3|##|##|##|##|..|##|##|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n3 1|##|##|##|..|..|..|..|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n3 2|##|##|##|..|..|..|##|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "hard",
+  "filename": "pattern_10x10dh_804c3344.txt",
+  "args": "10x10dh",
+  "problem": "                       1          \n                       2          \n                       1  3  2  2 \n     7  7  1  4  4  6  1  3  3  3 \n   +--+--+--+--+--+--+--+--+--+--+\n2 4|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n2 3|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n3 1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n2 1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n2 2|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n2 1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n2 5|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n3 3|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  7|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n3 2|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+",
+  "solution": "                       1          \n                       2          \n                       1  3  2  2 \n     7  7  1  4  4  6  1  3  3  3 \n   +--+--+--+--+--+--+--+--+--+--+\n2 4|##|##|..|..|..|..|##|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n2 3|##|##|..|..|..|..|..|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n3 1|##|##|##|..|..|..|..|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n2 1|##|##|..|..|..|..|##|..|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n2 2|##|##|..|..|..|##|##|..|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n2 1|##|##|..|..|..|##|..|..|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n2 5|##|##|..|##|##|##|##|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n3 3|..|..|..|##|##|##|..|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n  7|..|..|..|##|##|##|##|##|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n3 2|..|..|..|##|##|##|..|..|##|##|\n   +--+--+--+--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "hard",
+  "filename": "pattern_10x10dh_535b6abe.txt",
+  "args": "10x10dh",
+  "problem": "        4                         \n     3  2  7  8  6  5  6  4  4  1 \n   +--+--+--+--+--+--+--+--+--+--+\n3 1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n4 1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n5 2|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n6 1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  6|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  6|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  7|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n1 5|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+\n  1|  |  |  |  |  |  |  |  |  |  |\n   +--+--+--+--+--+--+--+--+--+--+",
+  "solution": "        4                         \n     3  2  7  8  6  5  6  4  4  1 \n   +--+--+--+--+--+--+--+--+--+--+\n3 1|..|##|##|##|..|..|..|..|##|..|\n   +--+--+--+--+--+--+--+--+--+--+\n4 1|##|##|##|##|..|..|..|..|##|..|\n   +--+--+--+--+--+--+--+--+--+--+\n5 2|##|##|##|##|##|..|..|..|##|##|\n   +--+--+--+--+--+--+--+--+--+--+\n6 1|##|##|##|##|##|##|..|..|##|..|\n   +--+--+--+--+--+--+--+--+--+--+\n  6|..|..|##|##|##|##|##|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n  6|..|..|##|##|##|##|##|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n  7|..|##|##|##|##|##|##|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n1 5|..|##|..|##|##|##|##|##|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n  1|..|..|..|..|..|..|##|..|..|..|\n   +--+--+--+--+--+--+--+--+--+--+\n  1|..|..|..|..|..|..|##|..|..|..|\n   +--+--+--+--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "pattern",
+  "difficulty": "hard",
+  "filename": "pattern_10x10dh_cf8495dd.txt",
+  "args": "10x10dh",
+  "problem": "             1  3  2  3  3  5     3 \n       4  4  6  1  2  2  2  2  6  1 \n     +--+--+--+--+--+--+--+--+--+--+\n  3 1|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+\n    6|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+\n  1 4|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+\n  2 4|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+\n  3 3|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+\n  3 3|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+\n  3 1|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+\n    2|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+\n  1 4|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+\n1 4 1|  |  |  |  |  |  |  |  |  |  |\n     +--+--+--+--+--+--+--+--+--+--+",
+  "solution": "             1  3  2  3  3  5     3 \n       4  4  6  1  2  2  2  2  6  1 \n     +--+--+--+--+--+--+--+--+--+--+\n  3 1|..|..|##|##|##|..|..|..|##|..|\n     +--+--+--+--+--+--+--+--+--+--+\n    6|..|..|..|##|##|##|##|##|##|..|\n     +--+--+--+--+--+--+--+--+--+--+\n  1 4|..|..|..|##|..|##|##|##|##|..|\n     +--+--+--+--+--+--+--+--+--+--+\n  2 4|##|##|..|..|..|##|##|##|##|..|\n     +--+--+--+--+--+--+--+--+--+--+\n  3 3|##|##|##|..|..|..|..|##|##|##|\n     +--+--+--+--+--+--+--+--+--+--+\n  3 3|##|##|##|..|..|..|..|##|##|##|\n     +--+--+--+--+--+--+--+--+--+--+\n  3 1|##|##|##|..|..|..|..|..|..|##|\n     +--+--+--+--+--+--+--+--+--+--+\n    2|..|..|##|##|..|..|..|..|..|..|\n     +--+--+--+--+--+--+--+--+--+--+\n  1 4|..|..|##|..|##|##|##|##|..|..|\n     +--+--+--+--+--+--+--+--+--+--+\n1 4 1|..|..|##|..|##|##|##|##|..|##|\n     +--+--+--+--+--+--+--+--+--+--+"
+ },
+ {
+  "family": "undead",
+  "difficulty": "easy",
+  "filename": "undead_4x4de_c1f43ec6.txt",
+  "args": "4x4de",
+  "problem": "G: 2 V: 6 Z: 3\n\n   2 0 4 3  \n 2 . . . . 2\n 0 \\ / . . 2\n 0 / . . . 3\n 0 / / . . 2\n   0 2 4 3  ",
+  "solution": "G: 2 V: 6 Z: 3\n\n   2 0 4 3  \n 2 V G Z G 2\n 0 \\ / V V 2\n 0 / V V V 3\n 0 / / Z Z 2\n   0 2 4 3  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "easy",
+  "filename": "undead_4x4de_0fd18e30.txt",
+  "args": "4x4de",
+  "problem": "G: 4 V: 3 Z: 4\n\n   2 2 3 0  \n 0 . \\ . \\ 0\n 2 . / . / 2\n 2 . . . . 2\n 2 / . . . 2\n   3 2 3 0  ",
+  "solution": "G: 4 V: 3 Z: 4\n\n   2 2 3 0  \n 0 G \\ V \\ 0\n 2 V / V / 2\n 2 Z Z G G 2\n 2 / Z Z G 2\n   3 2 3 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "easy",
+  "filename": "undead_4x4de_6f20627a.txt",
+  "args": "4x4de",
+  "problem": "G: 4 V: 6 Z: 0\n\n   0 2 1 1  \n 0 \\ \\ . . 0\n 3 . . . . 3\n 0 / . / . 0\n 1 / \\ . . 2\n   0 0 2 1  ",
+  "solution": "G: 4 V: 6 Z: 0\n\n   0 2 1 1  \n 0 \\ \\ G G 0\n 3 V V V G 3\n 0 / V / G 0\n 1 / \\ V V 2\n   0 0 2 1  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "easy",
+  "filename": "undead_4x4de_b9388a3d.txt",
+  "args": "4x4de",
+  "problem": "G: 4 V: 2 Z: 3\n\n   2 1 1 3  \n 1 . / \\ . 0\n 2 . \\ . / 0\n 2 / . . \\ 0\n 1 / . . . 0\n   3 2 4 0  ",
+  "solution": "G: 4 V: 2 Z: 3\n\n   2 1 1 3  \n 1 Z / \\ G 0\n 2 Z \\ Z / 0\n 2 / V V \\ 0\n 1 / G G G 0\n   3 2 4 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "easy",
+  "filename": "undead_4x4de_bd4167ad.txt",
+  "args": "4x4de",
+  "problem": "G: 2 V: 3 Z: 4\n\n   1 3 2 0  \n 5 . . . \\ 0\n 1 / . \\ . 0\n 0 . / / / 3\n 3 . . . / 0\n   2 3 3 0  ",
+  "solution": "G: 2 V: 3 Z: 4\n\n   1 3 2 0  \n 5 Z V V \\ 0\n 1 / V \\ G 0\n 0 G / / / 3\n 3 Z Z Z / 0\n   2 3 3 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "medium",
+  "filename": "undead_5x5dm_bd47fd3a.txt",
+  "args": "5x5dm",
+  "problem": "G: 7 V: 5 Z: 3\n\n   2 1 3 1 0  \n 0 . / . \\ . 0\n 2 \\ \\ \\ . . 0\n 2 . . \\ / \\ 2\n 4 . . . \\ / 1\n 2 . . . . . 2\n   2 3 2 2 1  ",
+  "solution": "G: 7 V: 5 Z: 3\n\n   2 1 3 1 0  \n 0 G / V \\ G 0\n 2 \\ \\ \\ G G 0\n 2 V V \\ / \\ 2\n 4 Z Z V \\ / 1\n 2 G G V G Z 2\n   2 3 2 2 1  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "medium",
+  "filename": "undead_5x5dm_24c30c88.txt",
+  "args": "5x5dm",
+  "problem": "G: 10 V: 4 Z: 5\n\n   0 5 0 4 6  \n 0 / . . . / 0\n 3 . . . . . 3\n 3 . . . / . 2\n 0 . . . \\ \\ 0\n 1 . \\ . . . 4\n   4 1 0 4 0  ",
+  "solution": "G: 10 V: 4 Z: 5\n\n   0 5 0 4 6  \n 0 / V G Z / 0\n 3 Z Z G G V 3\n 3 G Z G / V 2\n 0 G G G \\ \\ 0\n 1 Z \\ G V G 4\n   4 1 0 4 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "medium",
+  "filename": "undead_5x5dm_ce0a1642.txt",
+  "args": "5x5dm",
+  "problem": "G: 4 V: 8 Z: 5\n\n   0 2 5 2 3  \n 3 . . . . . 3\n 4 . . . \\ . 2\n 2 \\ \\ \\ . / 0\n 5 . . . . . 5\n 0 \\ / . . / 0\n   0 0 3 5 0  ",
+  "solution": "G: 4 V: 8 Z: 5\n\n   0 2 5 2 3  \n 3 G V V Z G 3\n 4 G Z Z \\ Z 2\n 2 \\ \\ \\ G / 0\n 5 V V V Z V 5\n 0 \\ / V V / 0\n   0 0 3 5 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "medium",
+  "filename": "undead_5x5dm_4a5ebb99.txt",
+  "args": "5x5dm",
+  "problem": "G: 8 V: 4 Z: 2\n\n   0 4 0 2 0  \n 4 \\ . / / \\ 0\n 0 . . / . / 4\n 2 . \\ / . / 2\n 2 . . . . . 2\n 0 \\ . / . . 1\n   0 2 2 3 0  ",
+  "solution": "G: 8 V: 4 Z: 2\n\n   0 4 0 2 0  \n 4 \\ V / / \\ 0\n 0 G G / V / 4\n 2 G \\ / G / 2\n 2 V G V G G 2\n 0 \\ Z / Z G 1\n   0 2 2 3 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "medium",
+  "filename": "undead_5x5dm_0770fdf4.txt",
+  "args": "5x5dm",
+  "problem": "G: 3 V: 9 Z: 6\n\n   2 0 4 3 3  \n 4 . \\ . . . 3\n 1 \\ . . . / 4\n 4 . . . \\ . 2\n 0 \\ \\ . . . 4\n 5 . . . . / 0\n   1 0 4 4 0  ",
+  "solution": "G: 3 V: 9 Z: 6\n\n   2 0 4 3 3  \n 4 Z \\ V V V 3\n 1 \\ V V Z / 4\n 4 V Z G \\ Z 2\n 0 \\ \\ V Z G 4\n 5 V G V Z / 0\n   1 0 4 4 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "hard",
+  "filename": "undead_7x7dh_c659419d.txt",
+  "args": "7x7dh",
+  "problem": "G: 8 V: 15 Z: 12\n\n   4 3 0 6 2 0 1  \n 7 . . \\ . . \\ . 1\n 7 . . . . \\ . \\ 0\n 4 . \\ \\ . . \\ . 1\n 6 . . . . / . . 1\n 3 \\ . \\ . . . . 7\n 0 \\ . . . / . . 3\n 0 / . . \\ . . . 6\n   0 5 6 0 0 8 4  ",
+  "solution": "G: 8 V: 15 Z: 12\n\n   4 3 0 6 2 0 1  \n 7 Z G \\ V V \\ V 1\n 7 V G Z G \\ V \\ 0\n 4 Z \\ \\ Z Z \\ V 1\n 6 G Z Z G / G G 1\n 3 \\ Z \\ Z V Z V 7\n 0 \\ Z V V / V V 3\n 0 / V V \\ G Z V 6\n   0 5 6 0 0 8 4  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "hard",
+  "filename": "undead_7x7dh_271c8105.txt",
+  "args": "7x7dh",
+  "problem": "G: 13 V: 9 Z: 2\n\n   0 2 3 3 1 2 0  \n 0 / . . / / / . 1\n 0 . / / / . . . 2\n 0 . . \\ / / / \\ 2\n 6 . \\ \\ / / . . 1\n 3 / . . . / / . 2\n 2 . \\ . . / . / 1\n 3 / . . . \\ \\ . 2\n   3 0 4 4 3 5 0  ",
+  "solution": "G: 13 V: 9 Z: 2\n\n   0 2 3 3 1 2 0  \n 0 / V Z / / / G 1\n 0 G / / / V V G 2\n 0 G G \\ / / / \\ 2\n 6 V \\ \\ / / G G 1\n 3 / G V V / / G 2\n 2 V \\ V V / G / 1\n 3 / G G Z \\ \\ G 2\n   3 0 4 4 3 5 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "hard",
+  "filename": "undead_7x7dh_135444a8.txt",
+  "args": "7x7dh",
+  "problem": "G: 7 V: 18 Z: 5\n\n   5 4 0 0 6 5 2  \n 3 . . \\ / . . / 0\n 2 . . \\ . . . . 5\n 3 . \\ / . . . . 4\n 2 . . / \\ \\ . \\ 0\n 0 . . \\ / . \\ . 0\n 5 . . . / / . / 1\n 2 . . \\ \\ \\ . . 3\n   5 3 0 2 2 3 0  ",
+  "solution": "G: 7 V: 18 Z: 5\n\n   5 4 0 0 6 5 2  \n 3 Z V \\ / Z V / 0\n 2 G Z \\ V Z V V 5\n 3 V \\ / V V V V 4\n 2 V V / \\ \\ V \\ 0\n 0 G G \\ / G \\ G 0\n 5 V Z V / / V / 1\n 2 V V \\ \\ \\ G G 3\n   5 3 0 2 2 3 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "hard",
+  "filename": "undead_7x7dh_62703468.txt",
+  "args": "7x7dh",
+  "problem": "G: 7 V: 16 Z: 5\n\n   0 2 5 1 2 4 0  \n 4 . . . . . . . 4\n 0 \\ / . . \\ . / 2\n 4 . . . / \\ / . 1\n 0 / . . / . / . 2\n 3 . . \\ \\ \\ \\ / 0\n 0 / / . . . \\ / 0\n 5 . . . . . / \\ 0\n   1 6 1 4 2 0 0  ",
+  "solution": "G: 7 V: 16 Z: 5\n\n   0 2 5 1 2 4 0  \n 4 G V Z G V V G 4\n 0 \\ / V G \\ V / 2\n 4 V V G / \\ / V 1\n 0 / V V / V / Z 2\n 3 V V \\ \\ \\ \\ / 0\n 0 / / V Z V \\ / 0\n 5 G Z G Z V / \\ 0\n   1 6 1 4 2 0 0  "
+ },
+ {
+  "family": "undead",
+  "difficulty": "hard",
+  "filename": "undead_7x7dh_2931ee4a.txt",
+  "args": "7x7dh",
+  "problem": "G: 11 V: 10 Z: 14\n\n   5 4 5 6 3 4 0  \n 5 . . . . . / \\ 0\n 5 . . . . . . . 5\n 6 . . . . . / \\ 5\n 0 . / . . \\ / \\ 3\n 4 . . . . . / . 2\n 6 . . . . / / . 0\n 6 / . . \\ . . \\ 5\n   0 8 5 0 0 2 4  ",
+  "solution": "G: 11 V: 10 Z: 14\n\n   5 4 5 6 3 4 0  \n 5 Z V Z Z Z / \\ 0\n 5 Z V Z V Z G G 5\n 6 Z V G V Z / \\ 5\n 0 G / Z Z \\ / \\ 3\n 4 Z G Z V G / V 2\n 6 Z G G G / / G 0\n 6 / V V \\ G V \\ 5\n   0 8 5 0 0 2 4  "
+ }
+]

frontend/test/pipeline/gen_fixtures.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+"""Pull reference solutions per (family, difficulty) from the topobench dataset.
+
+Writes fixtures.json next to this script: a list of
+  {family, difficulty, filename, args, problem, solution}
+used by the TS round-trip test and the Python verifier oracle.
+
+Run with an env that has `datasets` installed (e.g. ~/base-venv).
+"""
+from __future__ import annotations
+
+import json
+from collections import defaultdict
+from pathlib import Path
+
+from datasets import load_dataset
+
+FAMILIES = ["bridges", "flow_free", "galaxies", "loopy", "pattern", "undead"]
+DIFFICULTIES = ["easy", "medium", "hard"]
+PER_COMBO = 5  # solutions per (family, difficulty)
+
+OUT = Path(__file__).resolve().parent / "fixtures.json"
+
+
+def main() -> None:
+    ds = load_dataset("topobench/topobench", split="test")
+    buckets: dict[tuple[str, str], list[dict]] = defaultdict(list)
+    for row in ds:
+        if "include" in row and not row["include"]:
+            continue
+        fam = row.get("puzzlename")
+        diff = row.get("difficulty")
+        if fam not in FAMILIES or diff not in DIFFICULTIES:
+            continue
+        if not row.get("solution") or not row.get("problem"):
+            continue
+        key = (fam, diff)
+        if len(buckets[key]) >= PER_COMBO:
+            continue
+        buckets[key].append(
+            {
+                "family": fam,
+                "difficulty": diff,
+                "filename": row.get("filename"),
+                "args": row.get("args"),
+                "problem": row["problem"],
+                "solution": row["solution"],
+            }
+        )
+
+    fixtures: list[dict] = []
+    for fam in FAMILIES:
+        for diff in DIFFICULTIES:
+            fixtures.extend(buckets[(fam, diff)])
+
+    OUT.write_text(json.dumps(fixtures, indent=1))
+    counts = {f"{fam}:{diff}": len(buckets[(fam, diff)]) for fam in FAMILIES for diff in DIFFICULTIES}
+    print(f"wrote {len(fixtures)} fixtures -> {OUT}")
+    for k, v in counts.items():
+        if v == 0:
+            print(f"  WARNING: no puzzles for {k}")
+    print(json.dumps(counts, indent=1))
+
+
+if __name__ == "__main__":
+    main()

frontend/test/pipeline/roundtrip.test.ts

@@ -0,0 +1,99 @@
+import { readFileSync, writeFileSync } from "node:fs";
+import { describe, it, expect } from "vitest";
+
+import { __testables as T } from "../../src/components/PuzzleEditor";
+
+type Fixture = {
+  family: string;
+  difficulty: string;
+  filename: string;
+  args: string;
+  problem: string;
+  solution: string;
+};
+
+const fixtures: Fixture[] = JSON.parse(
+  readFileSync(new URL("./fixtures.json", import.meta.url), "utf8"),
+);
+
+// Mirror exactly what each <Family>Editor.onChange emits: decode the board into
+// editor state, then re-encode it. A correct editor round-trips a valid solution
+// back to an equivalent valid board.
+function reemit(family: string, problem: string, board: string): string {
+  switch (family) {
+    case "bridges":
+      return T.bridgesBoardFromStates(problem, T.bridgesStatesFromBoard(problem, board));
+    case "loopy":
+      return T.loopyBoardFromStates(problem, T.loopyEdgeStates(problem, board));
+    case "galaxies":
+      return T.galaxiesBoardFromStates(problem, T.galaxiesBoundaryStates(problem, board));
+    case "pattern":
+      return T.patternToAscii(T.parsePattern(board));
+    case "undead":
+      return T.undeadToAscii(T.parseUndead(board));
+    case "flow_free":
+      return T.joinGrid(T.cloneGrid(T.splitLines(board)));
+    default:
+      throw new Error(`unknown family ${family}`);
+  }
+}
+
+const rtrim = (s: string) =>
+  s
+    .replace(/\r/g, "")
+    .split("\n")
+    .map((l) => l.replace(/\s+$/, ""))
+    .join("\n")
+    .replace(/\n+$/, "");
+
+// Compute round-trips once and persist them for the Python verifier-oracle step.
+const results = fixtures.map((f) => ({
+  ...f,
+  roundtrip: reemit(f.family, f.problem, f.solution),
+}));
+writeFileSync(
+  new URL("./roundtrip_out.json", import.meta.url),
+  JSON.stringify(results, null, 1),
+);
+
+// Emit a click-plan for bridges so the Playwright e2e spec can replay the solution
+// in the real UI without importing this React module into the e2e runner. Each entry
+// is the ordered list of grid-button indices to click (repeated for double bridges).
+const bridgesClickPlan: Record<string, number[]> = {};
+for (const f of fixtures.filter((x) => x.family === "bridges")) {
+  const parsed = T.parseBridges(f.problem);
+  const target = T.bridgesStatesFromBoard(f.problem, f.solution);
+  const lineLens: number[] = parsed.lines.map((l: string) => l.length);
+  const indexOf = (r: number, c: number) =>
+    lineLens.slice(0, r).reduce((a: number, b: number) => a + b, 0) + c;
+  const clicks: number[] = [];
+  for (const opp of parsed.opportunities) {
+    const level = target[opp.id] ?? 0;
+    if (level === 0) continue;
+    const owned =
+      opp.cells.find(
+        ([r, c]: [number, number]) => parsed.cellToOpportunity.get(`${r}:${c}`)?.id === opp.id,
+      ) ?? opp.cells[0];
+    const idx = indexOf(owned[0], owned[1]);
+    for (let i = 0; i < level; i += 1) clicks.push(idx);
+  }
+  bridgesClickPlan[f.filename] = clicks;
+}
+writeFileSync(
+  new URL("./bridges_clickplan.json", import.meta.url),
+  JSON.stringify(bridgesClickPlan, null, 1),
+);
+
+const families = [...new Set(fixtures.map((f) => f.family))];
+
+describe("editor round-trip preserves a valid solution (idempotency)", () => {
+  for (const family of families) {
+    it(`${family}: re-emitting the reference solution reproduces it`, () => {
+      const mismatches = results
+        .filter((r) => r.family === family)
+        .filter((r) => rtrim(r.roundtrip) !== rtrim(r.solution))
+        .map((r) => r.filename);
+      expect(mismatches, `mismatched puzzles: ${mismatches.join(", ")}`).toEqual([]);
+    });
+  }
+});

frontend/test/pipeline/run.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+# Full-pipeline puzzle test: dataset solutions -> editor encode/decode round-trip
+# -> production verifier. Catches editor encode bugs (e.g. the bridges crossing-cell
+# clobber) by proving every family's reference solution survives a round-trip through
+# the real editor functions and still verifies SOLVED.
+set -euo pipefail
+
+HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+FRONTEND="$(cd "$HERE/../.." && pwd)"
+PY="${PYTHON:-python3}"
+
+echo "==> 1/3 generating dataset fixtures"
+"$PY" "$HERE/gen_fixtures.py"
+
+echo "==> 2/3 editor round-trip (vitest) + emit roundtrip_out.json"
+( cd "$FRONTEND" && npx vitest run test/pipeline/roundtrip.test.ts )
+
+echo "==> 3/3 verifier oracle (production verifier on every round-tripped board)"
+SDL_AUDIODRIVER=dummy SDL_VIDEODRIVER=dummy PYTHONWARNINGS=ignore "$PY" "$HERE/verify_oracle.py"

frontend/test/pipeline/verify_oracle.py

@@ -0,0 +1,91 @@
+#!/usr/bin/env python3
+"""Verifier-oracle step of the full-pipeline test.
+
+Reads roundtrip_out.json (emitted by roundtrip.test.ts) and, using the REAL
+production verification path (normalize_board_for_submission -> VerificationService.verify,
+the exact pair the /submit handler calls), asserts for every fixture:
+
+  1. the dataset reference SOLUTION verifies SOLVED   (oracle sanity: verifier works per family)
+  2. the editor ROUND-TRIPPED board verifies SOLVED   (the real gate: editor didn't corrupt it)
+  3. the empty PROBLEM board verifies NOT SOLVED      (verifier isn't rubber-stamping)
+
+Exit code 0 only if every assertion holds. Run with the same Python that can
+import the rlp verifier (the Space image / a built rlp env).
+"""
+from __future__ import annotations
+
+import json
+import sys
+from collections import defaultdict
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[3]
+sys.path.insert(0, str(REPO_ROOT))
+
+from space_app.board_utils import normalize_board_for_submission  # noqa: E402
+from space_app.verification import VerificationService  # noqa: E402
+
+OUT = Path(__file__).resolve().parent / "roundtrip_out.json"
+
+
+def verify(svc: VerificationService, family: str, problem: str, board: str, args: str) -> bool:
+    normalized = normalize_board_for_submission(
+        puzzle_type=family, problem_ascii=problem, board_ascii=board
+    )
+    result = svc.verify(
+        puzzle_type=family, problem_ascii=problem, board_ascii=normalized, args=args
+    )
+    return bool(result.get("correct"))
+
+
+def main() -> int:
+    rows = json.loads(OUT.read_text())
+    svc = VerificationService()
+    fails: list[str] = []
+    neg_seen: set[str] = set()
+    neg_fail: list[str] = []
+    by_family: dict[str, dict[str, int]] = defaultdict(lambda: {"sol": 0, "rt": 0, "n": 0})
+
+    for r in rows:
+        fam, prob, args = r["family"], r["problem"], r["args"]
+        fn = r["filename"]
+        by_family[fam]["n"] += 1
+
+        if verify(svc, fam, prob, r["solution"], args):
+            by_family[fam]["sol"] += 1
+        else:
+            fails.append(f"[{fam}] reference SOLUTION did NOT verify: {fn}")
+
+        if verify(svc, fam, prob, r["roundtrip"], args):
+            by_family[fam]["rt"] += 1
+        else:
+            fails.append(f"[{fam}] ROUND-TRIP board did NOT verify: {fn}")
+
+        # one negative control per family: the empty problem must NOT verify solved
+        if fam not in neg_seen:
+            neg_seen.add(fam)
+            if verify(svc, fam, prob, prob, args):
+                neg_fail.append(f"[{fam}] empty PROBLEM wrongly verified SOLVED: {fn}")
+
+    print("family        n   sol_ok  rt_ok")
+    for fam in sorted(by_family):
+        s = by_family[fam]
+        print(f"{fam:12s}  {s['n']:2d}   {s['sol']:3d}    {s['rt']:3d}")
+
+    ok = True
+    if fails:
+        ok = False
+        print("\nFAILURES (solution/round-trip):")
+        for f in fails:
+            print("  " + f)
+    if neg_fail:
+        ok = False
+        print("\nFAILURES (negative control — verifier accepted an unsolved board):")
+        for f in neg_fail:
+            print("  " + f)
+    print("\n" + ("ALL VERIFIER-ORACLE CHECKS PASSED" if ok else "VERIFIER-ORACLE CHECKS FAILED"))
+    return 0 if ok else 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())