Question: How many squares of any size on this chessboard do not contain a rook?

Answer: 110 squares.


Question: How many squares of any size on this chessboard do not contain a rook?

Answer: 93 squares.


Question: How many squares of any size on this chessboard do not contain a rook?

Answer: 125 squares.


Question: How many squares of any size on this chessboard do not contain a rook?

Answer: 116 squares.


Question: How many squares of any size on this chessboard do not contain a rook?

Answer: 128 squares.


Question: What is the minimum number of queens required on a chessboard such that all squares are attacked?

Answer: 5.


Question:
You are given a chess position in FEN: r1r4k/7q/7Q/8/3PP3/1p6/P1p4P/2K3R1 w - - 2 41.
Find the best move for the side to play.

Answer: h6f6


Question:
You are given a chess position in FEN: 1k1r4/1p2R3/pq1r3P/4pp2/3p4/2P5/PP1Q1P2/1K1R4 b - - 3 29.
Find the best move for the side to play.

Answer: d4c3


Question:
You are given a chess position in FEN: 4r1k1/p2p1p2/1q4pp/3P2n1/8/R1Q2PP1/3NNK1P/8 w - - 3 31.
Identify every battery (2 or more aligned long-range pieces, e.g, RR/RQ/QQ on files or ranks, BQ/BB/QQ on diagonals, of the same color with no pieces between). Report each battery as the squares of the pieces in alphabetical order (a>h, 1>8), using '>' to separate squares in a battery and ',' to separate multiple batteries, e.g., .

Answer: a3>c3


Question:
You are given a chess position in FEN: 6r1/8/2k4B/p1pp1r2/4p2P/1PN3P1/P4n2/R4RK1 b - - 1 32.
Find the best move for the side to play.

Answer: g8g3


Question:
You are given a chess position in FEN: k3r3/2p5/R2p2pp/1p1B4/5P2/8/5qNP/7K b - - 1 47.
Find all legal moves in this position. List the moves in UCI format, separated by commas and spaces.

Answer: a8b8


Question:
You are given a chess position in FEN: r5k1/1p2qrpp/p3pp2/2Np4/PQ1Pn3/1P2P3/2R2PPP/5RK1 w - - 6 26.
Identify every battery (2 or more aligned long-range pieces, e.g, RR/RQ/QQ on files or ranks, BQ/BB/QQ on diagonals, of the same color with no pieces between). Report each battery as the squares of the pieces in alphabetical order (a>h, 1>8), using '>' to separate squares in a battery and ',' to separate multiple batteries, e.g., .

Answer: e7>f7


Question:
You are given a chess position in FEN: rnbqkb1r/pppppppp/5n2/8/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq - 2 2
A player makes the move: c7c6
Select the commentary that best describes this position and move.

Options:
A. The only move. Black makes possible the transfer of his monarch to h7 via g8.
B. Now Black returns the favor. The pawn at c6 helps in the center and leaves the kingside safe, but it doesn't help the black pieces get out.
C. Now Black is having great trouble and his next move even blunders the whole game. However, he has to give up the f4-pawn after which White has very good winning chances.
D. Black's main problem is the lack of any constructive ideas. At the same time, White keeps excellent winning chances even if Black could swap all the rooks.

Answer: B


Question:
You are given a chess position in FEN: 1r3k2/5pbQ/3p3P/3Pp1P1/3nBp2/p4P2/1q5R/NK1R4 w - - 0 33.
In this position, the side to move is in check. Identify the piece(s) that is delivering the check.

Answer: Black Queen at b2


Question:
You are given a chess position in FEN: r2qkb1r/p2b1pp1/2Q1Rn1p/3p4/8/2PB1N2/PP1P1PPP/RNB3K1 b kq - 0 12.
 For each pin, provide the key squares in the format: pinning_piece>pinned_piece>target_piece (e.g., ).

Answer: c6>d7>e8


Question:
You are given a chess position in FEN: r5kr/1b3ppp/n2Qp3/8/4q3/4B3/PPP2PPP/2KR3R w - - 5 18.
Find the best move for the side to play.

Answer: d6d8


Question:
You are given a chess position in FEN: r3r3/1p3pk1/p1pq2p1/3n4/3P2Q1/PB6/1P3PPP/4RRK1 w - - 0 23.
Provide the complete piece arrangement of this position. List all pieces with their colors, types, and squares.
Format: 'Color PieceType: [square1, square2, ...]', separated by commas and spaces for different piece types.
List the pieces in the order of White pieces first (King, Queen, Rook, Bishop, Knight, Pawn) followed by Black pieces (King, Queen, Rook, Bishop, Knight, Pawn).
If a piece type has no pieces on the board, skip it in the listing.
List the squares for each piece type in alphabetical order.

Answer: White King: ['g1'], White Queen: ['g4'], White Rook: ['e1', 'f1'], White Bishop: ['b3'], White Pawn: ['a3', 'b2', 'd4', 'f2', 'g2', 'h2'], Black King: ['g7'], Black Queen: ['d6'], Black Rook: ['a8', 'e8'], Black Knight: ['d5'], Black Pawn: ['a6', 'b7', 'c6', 'f7', 'g6']


Question:
You are given a chess position in FEN: 2Q5/4B1bk/7p/2pqr1p1/6P1/2P1N2P/1P1n1P2/3R2K1 b - - 10 36.
Find the best move for the side to play.

Answer: d2f3


Question:
You are analyzing a chess position in FEN: 4k3/8/5p1p/4n1p1/4R3/7P/5PP1/6K1 w - -.
Estimate the Stockfish evaluation in centipawns (from White's perspective). Think deeper about this position: Don't just evaluate the current board state. Consider what the most likely moves are for both sides and how the centipawn evaluation would change as the position develops. Analyze a moves ahead - what does the future of this position look like? How would a strong engine assess this position after calculating many moves deep?Analyze step by step and explain your reasoning.

Answer: 400


Question:
You are given a chess position in FEN: r1b2rk1/pppq1ppp/1bn5/6B1/3PR3/2N2N1P/PP3PP1/R2Q2K1 w - - 2 14
A player makes the move: d4d5
Select the commentary that best describes this position and move.

Options:
A. A passed pawn on the kingside and Black's uncoordinated pieces give White a decisive advantage.
B. Although isolated, this centre pawn assumes the role of a blockader.
C. Black decides to exchange the b-pawns to open the b-file for the queenside rook.
D. This is also a forced move. Otherwise White would play c3 and Bb3 with an unplesant attack for White, on both sides! MVL correctly tries to diminish the material on the board.

Answer: B


Question:
You are given a chess position in FEN: r4r1k/pp2Npb1/3pbR2/4p3/4P1q1/3B2p1/PPPQ3P/4R1K1 b - - 3 20.
Identify all discovered-check moves (your move uncovers a check from a rook/bishop/queen on the enemy king). Report each as UCI move (e.g., ).

Answer: g3h2


Question:
You are given a chess position in FEN: r4rk1/p2Q1pbp/1p2p1p1/7n/2B5/4B2P/Pq3PP1/2RR2K1 b - - 1 23.
Identify all forks in this position. A fork occurs when one piece attacks two or more enemy pieces simultaneously. For each fork, provide the key squares in the format: forking_piece>attacked_piece1-attacked_piece2(-attacked_piece3 ...) (e.g., ).

Answer: d7>a7-e6-f7, b2>a2-c1-f2


Question:
You are given a chess position in FEN: 8/3kppnp/3p2p1/p1pP1PP1/P1P3KP/8/8/1B6 b - - 0 38.
Find all squares that the White Bishop on b1 controls (i.e. every empty square that the White Bishop on b1 could legally move to, excluding squares occupied by any piece).
Exclude control if the White Bishop on b1 is pinned to its king and thus cannot move.

Answer: a2, c2, d3, e4


Question:
You are given a chess position in FEN: rnbqkbnr/pppp1p1p/8/6p1/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq - 0 4
A player makes the move: f1c4
Select the commentary that best describes this position and move.

Options:
A. A very rare move intended to avoid the main lines, which can also be played on move 2 Of course the intention is to continue with g4, but 2 h3 is somewhat more solid than the immediate 2 g4, when the most principled move for Black is to take the gambit.
B. When preparing for the game, White noticed that White's opponent has a wide repertoire. White's team mates had warned White that he is well prepared in theoretical lines and White must confess that White did not feel like facing the Volga/Benko Gambit on that day. The game move does not promise an advantage, but leaves both players on their own at a very early stage, which was precisely White's intention.
C. We have transposed to a normal line of the Queen's Gambit Declined Exchange Variation. More often you see the move e3 instead of Qc2. So Black tries to take advantage of this fact by developing his knight to a6 and threatening Nb4.
D. This form of the gambit is almost out of date. Chigorin, however, ocassionaly plays it, and with success. h4 instead, bringing about the Allgaier or Kieseritzky, is now more frequently adopted.

Answer: D


Question:
You are analyzing a chess position in FEN: rn2kb1r/pp3ppp/1qp2n2/5pN1/2B5/2N5/PPPP1PPP/R1BQ2K1 b kq -.
Estimate the Stockfish evaluation in centipawns (from White's perspective). Think deeper about this position: Don't just evaluate the current board state. Consider what the most likely moves are for both sides and how the centipawn evaluation would change as the position develops. Analyze a moves ahead - what does the future of this position look like? How would a strong engine assess this position after calculating many moves deep?

Answer: 200


Question:
You are analyzing a chess position in FEN: 5rk1/pp1b1ppp/4p3/3pP3/1q3Pn1/2NB1N2/P2K2PP/R4Q2 b - -.
Estimate the Stockfish evaluation in centipawns (from White's perspective). Think deeper about this position: Don't just evaluate the current board state. Consider what the most likely moves are for both sides and how the centipawn evaluation would change as the position develops. Analyze a moves ahead - what does the future of this position look like? How would a strong engine assess this position after calculating many moves deep?Analyze step by step and explain your reasoning.

Answer: -400


Question:
You are given a chess position in FEN: 8/8/P7/4k1pp/4Pp2/2N4r/1P1K4/8 b - - 0 54.
Find all legal moves in this position. List the moves in UCI format, separated by commas and spaces.

Answer: e5d4, e5d6, e5e6, e5f6, f4f3, g5g4, h3c3, h3d3, h3e3, h3f3, h3g3, h3h1, h3h2, h3h4, h5h4


Question:
You are analyzing a chess position in FEN: 2b5/1p6/p2r1k2/4Rp2/2B2P1p/2K5/PP4P1/8 w - -.
Estimate the Stockfish evaluation in centipawns (from White's perspective). Think deeper about this position: Don't just evaluate the current board state. Consider what the most likely moves are for both sides and how the centipawn evaluation would change as the position develops. Analyze a moves ahead - what does the future of this position look like? How would a strong engine assess this position after calculating many moves deep?Analyze step by step and explain your reasoning.

Answer: 0


Question:
You are given a chess position in FEN: 5r1k/3r2np/p6P/2N1Q3/1pB5/1Pn5/PKPq4/7b b - - 2 35.
 For each pin, provide the key squares in the format: pinning_piece>pinned_piece>target_piece (e.g., ).

Answer: d2>c2>b2, e5>g7>h8


Question:
You are given a chess position in FEN: 2kr3r/ppp2pp1/5n1p/2b1pnNq/4N1P1/3P4/PPP1B1PP/R1BQR2K b - - 0 13.
Find the best move for the side to play.

Answer: h5h2


Question:
You are given a chess position in FEN: 3r4/pp3kQ1/2pq1n2/5b1N/3P4/5P2/PPP5/2K5 b - - 2 27.
Identify all skewers in this position. A skewer occurs when a more valuable piece is attacked first and forced to move, exposing a less valuable piece behind it to be captured. For each skewer, provide the key squares in the format: skewering_piece>front_piece>back_piece (e.g., ).

Answer: g7>f7>b7


Question:
You are given a chess position in FEN: r1b2k1r/1p1pppNp/p1n2np1/8/P1B1P3/2N1B3/1qP2PPP/R2QK2R w KQ - 1 11.
Identify every battery (2 or more aligned long-range pieces, e.g, RR/RQ/QQ on files or ranks, BQ/BB/QQ on diagonals, of the same color with no pieces between). Report each battery as the squares of the pieces in alphabetical order (a>h, 1>8), using '>' to separate squares in a battery and ',' to separate multiple batteries, e.g., .

Answer: a1>d1


Question:
You are given a chess position in FEN: 3r1rk1/pp2p1b1/1q1p2pp/3R1p2/2PRN1BP/1P4Q1/P4PP1/6K1 b - - 0 22.
Find all squares that the White Knight on e4 can capture (i.e. every square that has an opponent piece such that the White Knight on e4 could legally move to that square and capture the piece).
Exclude captures if the White Knight on e4 is pinned to its king and thus cannot move.

Answer: d6


Question:
You are analyzing a chess position in FEN: r1b2r2/pp3kpQ/1q2p3/3pPp2/4n3/7R/PP3PPP/R4BK1 w - -.
Estimate the Stockfish evaluation in centipawns (from White's perspective). Think deeper about this position: Don't just evaluate the current board state. Consider what the most likely moves are for both sides and how the centipawn evaluation would change as the position develops. Analyze a moves ahead - what does the future of this position look like? How would a strong engine assess this position after calculating many moves deep?Analyze step by step and explain your reasoning.

Answer: -400


Question:
You are given a chess position in FEN: 5rk1/pp4pp/4q3/8/2P5/PP2p3/2P1Q1PP/R6K w - - 2 29.
Find all squares that contain pieces that the White Queen on e2 protects (i.e. every square that contains a piece such that the White Queen on e2 could legally recapture if an enemy piece captured it, excluding the king since it can't be captured).
Exclude protection if the White Queen on e2 is pinned to its king and thus cannot move.

Answer: c2, c4, g2


Question:
You are given a chess position in FEN: 3rr1k1/p4pq1/bp2p3/4R1NQ/3p1P2/2P5/PP5P/4R1K1 w - - 1 28
A player makes the move: g1f2
Select the commentary that best describes this position and move.

Options:
A. A very unfortunate move and the one that loses on the spot. White wanted to gain the best version of Bxf6 exf6 Nd4 position, which would enter a rook endgame, but missed a much more relevant detail.
B. In this type of position, White's king usually feels safe on the queenside, since the barrier constructed on the queenside is not easy to remove for Black.
C. The decisive mistake. Now Black is allowed to stop all White's hope of an attack and also to start going with his connected passed pawns.
D. Freeing g1 for the rook, White still has the attack

Answer: D


Question:
You are given a chess position in FEN: 3rn1k1/5pp1/pN5q/2pP1Q2/2P2P2/6P1/P3R1K1/8 w - - 1 36.
Identify all forks in this position. A fork occurs when one piece attacks two or more enemy pieces simultaneously. For each fork, provide the key squares in the format: forking_piece>attacked_piece1-attacked_piece2(-attacked_piece3 ...) (e.g., ).

Answer: h6>b6-f4


Question:
You are given a chess position in FEN: 5rk1/pN3ppp/4p1b1/3P2b1/2q3P1/5Q2/P4P1P/3R1RK1 w - - 0 26.
Identify all forks in this position. A fork occurs when one piece attacks two or more enemy pieces simultaneously. For each fork, provide the key squares in the format: forking_piece>attacked_piece1-attacked_piece2(-attacked_piece3 ...) (e.g., ).

Answer: c4>a2-d5-f1-g4


Question:
You are analyzing a chess position in FEN: 1rnr4/2q2pbk/R5b1/2p2BPQ/2p1Np2/2PP4/1P3P2/R5K1 b - -.
Estimate the Stockfish evaluation in centipawns (from White's perspective). Think deeper about this position: Don't just evaluate the current board state. Consider what the most likely moves are for both sides and how the centipawn evaluation would change as the position develops. Analyze a moves ahead - what does the future of this position look like? How would a strong engine assess this position after calculating many moves deep?Analyze step by step and explain your reasoning.

Answer: 400


Question:
You are given a chess position in FEN: 2kr4/1pp3p1/p2p4/3PpKR1/2Nr4/7p/PPP4R/8 w - - 0 29.
Find all legal moves in this position. List the moves in UCI format, separated by commas and spaces.

Answer: a2a3, a2a4, b2b3, b2b4, c2c3, c4a3, c4a5, c4b6, c4d2, c4d6, c4e3, c4e5, f5e6, f5g6, g5g1, g5g2, g5g3, g5g4, g5g6, g5g7, g5h5, h2d2, h2e2, h2f2, h2g2, h2h1, h2h3


Question:
You are given a chess position in FEN: r1b2rk1/pppq1ppp/1bn5/6B1/3PR3/2N2N1P/PP3PP1/R2Q2K1 w - - 2 14
A player makes the move: d4d5
Select the commentary that best describes this position and move.

Options:
A. A novelty. White's idea is to support e4 by Nf2 and then rush with the h-pawn to attack the black king.
B. In my opinion,that move is the only attempt to reach an advantage
C. The usual way of development could secure White permanent advantage, but he wants more intending to attack on the kingside by Nf4, h5 and Ng6.
D. Although isolated, this centre pawn assumes the role of a blockader.

Answer: D


Question:
You are given a chess position in FEN: 3r1k2/p2P4/1p3p1p/2p3p1/n4P2/2P3P1/7P/1R2R1K1 w - - 0 26.
Find all legal moves for the piece on square h2. List the moves in UCI format, separated by commas and spaces.

Answer: h2h3, h2h4


Question:
You are given a chess position in FEN: 4r3/1pqb1rpk/p3pp1p/2Pp3N/1P4Q1/P5R1/5PPP/R5K1 b - - 5 24.
Identify all skewers in this position. A skewer occurs when a more valuable piece is attacked first and forced to move, exposing a less valuable piece behind it to be captured. For each skewer, provide the key squares in the format: skewering_piece>front_piece>back_piece (e.g., ).

Answer: c7>g3>h2


Question:
You are analyzing a chess position in FEN: 2n2rk1/3q2p1/4b3/b2pBp2/2pP2p1/p1P3N1/P1B2PPQ/1R4K1 b - -.
Estimate the Stockfish evaluation in centipawns (from White's perspective). Think deeper about this position: Don't just evaluate the current board state. Consider what the most likely moves are for both sides and how the centipawn evaluation would change as the position develops. Analyze a moves ahead - what does the future of this position look like? How would a strong engine assess this position after calculating many moves deep?

Answer: 200


Question:
You are given a chess position in FEN: 3N4/p5kp/1p2B1n1/4Pp2/5P2/4K2b/PP6/8 b - - 2 46
A player makes the move: g6e7
Select the commentary that best describes this position and move.

Options:
A. Black prevents White's breakthrough a4-a5, changes White's superb d5 knight, but it doesn't help Black too much... His pawns will be very vulnerable and he hasn't enough time to centralize his monarch.
B. This is the rub. White defends the b3-pawn indirectly by creating a mating net against Black's king.
C. White exchanges Black's most active piece. Starting with this move, a new migration of forces towards the queenside is initiated.
D. Black has achieved a solid defensive setup and Black was probably expecting a draw offer reasonable soon. White, however, plugs away and goes close to creating serious winning chances. His advantage lies in the fact that Black cannot afford to exchange all the minor pieces as then White's protected passed pawn will be a decisive factor in the pawn ending. Not a great deal to work with, I agree, but the need to avoid exchanges is certainly an inhibiting factor on Black.

Answer: D


Question:
You are analyzing a chess position in FEN: r3r1k1/1b3pp1/p7/1p1Pq2Q/1P6/P7/6PP/3R1RK1 w - -.
Estimate the Stockfish evaluation in centipawns (from White's perspective). Think deeper about this position: Don't just evaluate the current board state. Consider what the most likely moves are for both sides and how the centipawn evaluation would change as the position develops. Analyze a moves ahead - what does the future of this position look like? How would a strong engine assess this position after calculating many moves deep?Analyze step by step and explain your reasoning.

Answer: 400


Question:
You are given a chess position in FEN: 8/5p1k/6p1/1q5p/1P5P/6P1/1Q5K/8 b - - 16 62.
Find all moves that put the opponent in check. List the moves in UCI format, separated by commas and spaces.

Answer: b5e2


Question:
You are given a chess position in FEN: r2q1rk1/1p4pp/pb1p1pn1/nb1P4/2p1PP2/8/PB1QN1PP/1BR1NR1K b - - 1 19
A player makes the move: c4c3
Select the commentary that best describes this position and move.

Options:
A. Only looks like a sacrifice, but White is winning pawn back and all idea is that d6 pawn will be weak.
B. Definitely not a mistake as it wins convincingly, but a pity not to have found a perfect win with the sacrifice of the rook on g7.
C. Black is getting ready to sacrifice one of the N on e6. This setup is a very standard way of meeting the d5 break and is easy to underestimate. Black can exchange both white Bs, but each exchange simply increases White's development lead. Black is already under very serious pressure and there is no way to alleviate it.
D. A very deep sacrifice of a pawn. It not only vacates a square in order to let in an important unit (the knight on a5), but it also entangles the enemy forces, with the additional hope of turning the open c-file to account.

Answer: D


Question:
You are given a chess position in FEN: 8/8/1p6/p4B2/PrP5/1PK5/8/2k5 w - - 9 68.
Find the best move for the side to play.

Answer: f5c2


Question:
You are given a chess position in FEN: 1r1qnk2/2p5/1pPp4/3Pp2p/2P1P2p/2N2PK1/8/R1Q5 w - - 0 43
A player makes the move: g3h3
Select the commentary that best describes this position and move.

Options:
A. The Pawn is only surrendered temporarily, as evidently White quickly recovers it with the Queen. Whites winning chance now consists in the fact, that in most lines of play he can invite exchange of Queens with a won end-game. Black has a very difficult game to play and his method of conducting it merits only praise.
B. Not only winning a tempo, but also clearing the c2-square for the knight.
C. The endgame is also easily winning: White has two extra pawns and better pieces.
D. [Black misses his last chance to finish off the game with a deserved victory. By 33 Rxf4! he would still have kept a winning advantage]

Answer: A


Question:
You are given a chess position in FEN: 6k1/6p1/p2bp1Np/1p1b1q1P/5P2/P3p1P1/1P5K/2Q5 w - - 2 43.
Find the best move for the side to play.

Answer: c1c8


Question:
You are given a chess position in FEN: 4r1k1/pB3ppp/1p1b1n2/8/r3p2R/1K2P3/P4PP1/1R2B3 b - - 1 31.
Find all squares that the Black Rook on a4 can capture (i.e. every square that has an opponent piece such that the Black Rook on a4 could legally move to that square and capture the piece).
Exclude captures if the Black Rook on a4 is pinned to its king and thus cannot move.

Answer: a2


Question:
You are given a chess position in FEN: 1r4k1/p1p2q1p/3pp1P1/3Q2B1/4P3/8/P3r1P1/K2R3R b - - 0 22.
Find the best move for the side to play.

Answer: f7g6


Question:
You are given a chess position in FEN: 4rk2/3bq2p/8/4n1pP/1pRNQ3/5P2/rP3NP1/4R1K1 b - - 1 31.
Find the best move for the side to play.

Answer: e5c4


Question:
You are given a chess position in FEN: r1bqk2r/pppp1ppp/2n2n2/8/1bBPP3/5N2/PP3PPP/RNBQK2R w KQkq - 1 7
A player makes the move: b1c3
Select the commentary that best describes this position and move.

Options:
A. This move is natural and wins a tempo, but closes the game. Now both sides will have clear areas of activity. For White this is the king's flank, where he can easily attack the base of the pawn chain and for Black is the opposite side of the board.
B. A move already advocated by Greco the Calabrese in 1619, by which White offers to give up a pawn for the attack.
C. White decides to infiltrate black's queenside with his queen. Black's king looks lonely while all the white pieces approach quickly.
D. White has large advantage in this ending because of weakness of black pawns and domination of white N over black B!

Answer: B


Question:
You are given a chess position in FEN: r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq - 5 4
A player makes the move: d7d6
Select the commentary that best describes this position and move.

Options:
A. Black leads back into the Steinitz Defence. The order of the moves is an improvement, as it avoids the dangerous Showalter Attack which occurs after 3 d6.
B. Black wanted to drive the c3-knight away from the centre so that the idea of opening the centre with f2-f3 and e2-e4 would lose strength.
C. Black is trying to play Bf7 and e5, there is no rush in exchanging on f4 as that bishop is not going anywhere. The game highly resembles and a6 Slav, except that Black has not committed to that weakness yet.
D. White just ignores the c4-pawn in order to start as quickly as possible active operations on the kingside, which ensures a complicated and double-edged battle.

Answer: A


Question:
You are given a chess position in FEN: 2kr4/pp4p1/2p3B1/5p2/1P2n3/P6P/3p1PP1/3R2K1 w - - 1 28.
Find the best move for the side to play.

Answer: g6f5


Question:
You are given a chess position in FEN: 3R4/2q2p1k/p3b1p1/1p2Pn2/1P3P1p/2PB2rP/4Q1PK/8 b - - 1 38.
Find all legal moves in this position. List the moves in UCI format, separated by commas and spaces.

Answer: a6a5, c7a5, c7a7, c7b6, c7b7, c7b8, c7c3, c7c4, c7c5, c7c6, c7c8, c7d6, c7d7, c7d8, c7e5, c7e7, e6a2, e6b3, e6c4, e6c8, e6d5, e6d7, f5d4, f5d6, f5e3, f5e7, f5g7, f5h6, f7f6, g3d3, g3e3, g3f3, g3g2, g3g4, g3g5, g3h3, g6g5, h7g7, h7h6


Question:
You are given a chess position in FEN: r1bQ1rk1/pp3pBp/2p3p1/8/2P5/2n5/PP2BPPP/R4RK1 b - - 0 13.
Find the best move for the side to play.

Answer: c3e2


Question:
You are given a chess position in FEN: 4r3/4P2p/1p3p2/3B1kp1/PP3b2/3R3P/5rP1/4R2K b - - 8 41.
Find all squares that the Black Rook on f2 can capture (i.e. every square that has an opponent piece such that the Black Rook on f2 could legally move to that square and capture the piece).
Exclude captures if the Black Rook on f2 is pinned to its king and thus cannot move.

Answer: g2


Question:
You are given a chess position in FEN: r2qr1k1/ppp4p/3p1p1B/2nP2p1/2P3bN/8/P1BN2PP/Q4RK1 w - - 0 17.
Identify every battery (2 or more aligned long-range pieces, e.g, RR/RQ/QQ on files or ranks, BQ/BB/QQ on diagonals, of the same color with no pieces between). Report each battery as the squares of the pieces in alphabetical order (a>h, 1>8), using '>' to separate squares in a battery and ',' to separate multiple batteries, e.g., .

Answer: a1>f1, a8>d8>e8


Question:
You are given a chess position in FEN: 5r2/6p1/2pkP2p/1p1pRBqP/8/6Q1/6K1/8 w - - 3 39.
Identify all moves that deliver a double check (two pieces give check after the move). Report each as UCI move (e.g., ).

Answer: e5d5


Question:
You are given a chess position in FEN: r4rk1/2pqb1p1/7p/p4b2/3NpP2/1PPnB2P/P2N2Q1/KR5R b - - 1 27
A player makes the move: c7c5
Select the commentary that best describes this position and move.

Options:
A. This was an interesting pawn sacrifice. White didn't think too highly of this move at first but later realised that it was tricky. He commended his opponent for his play after the game.
B. A surprising and strong idea. White is even prepared to give up the g4-pawn in order to get a mobile centre and some files. I'm happy I was not the one who had to face this, unprepared, over the board.
C. Dislodging White's only well-posted piece. Black: A nice move that freshens up the attack. The occupation of the long diagonal by Black's black bishop will be decisive.
D. White is trying to win a tempo comparing to the exchange on f5 and saves his dark-squared bishop.

Answer: C


Question:
You are given a chess position in FEN: 6r1/ppk5/8/6N1/1Pp2P2/P1R3P1/3r4/6K1 b - - 1 35.
Find all squares that contain pieces that the White Rook on c3 protects (i.e. every square that contains a piece such that the White Rook on c3 could legally recapture if an enemy piece captured it, excluding the king since it can't be captured).
Exclude protection if the White Rook on c3 is pinned to its king and thus cannot move.

Answer: a3, g3


Question:
You are given a chess position in FEN: 5rk1/8/1pp1p3/2bp1p1q/6nN/2Q1PBP1/rB6/3N1RK1 b - - 7 32.
Provide the complete piece arrangement of this position. List all pieces with their colors, types, and squares.
Format: 'Color PieceType: [square1, square2, ...]', separated by commas and spaces for different piece types.
List the pieces in the order of White pieces first (King, Queen, Rook, Bishop, Knight, Pawn) followed by Black pieces (King, Queen, Rook, Bishop, Knight, Pawn).
If a piece type has no pieces on the board, skip it in the listing.
List the squares for each piece type in alphabetical order.

Answer: White King: ['g1'], White Queen: ['c3'], White Rook: ['f1'], White Bishop: ['b2', 'f3'], White Knight: ['d1', 'h4'], White Pawn: ['e3', 'g3'], Black King: ['g8'], Black Queen: ['h5'], Black Rook: ['a2', 'f8'], Black Bishop: ['c5'], Black Knight: ['g4'], Black Pawn: ['b6', 'c6', 'd5', 'e6', 'f5']


Question:
You are given a chess position in FEN: 6rk/pn5p/1p1p4/3Pp3/qPP1QpP1/3B1P2/2R4r/3K1R2 b - - 2 40.
Provide the complete piece arrangement of this position. List all pieces with their colors, types, and squares.
Format: 'Color PieceType: [square1, square2, ...]', separated by commas and spaces for different piece types.
List the pieces in the order of White pieces first (King, Queen, Rook, Bishop, Knight, Pawn) followed by Black pieces (King, Queen, Rook, Bishop, Knight, Pawn).
If a piece type has no pieces on the board, skip it in the listing.
List the squares for each piece type in alphabetical order.

Answer: White King: ['d1'], White Queen: ['e4'], White Rook: ['c2', 'f1'], White Bishop: ['d3'], White Pawn: ['b4', 'c4', 'd5', 'f3', 'g4'], Black King: ['h8'], Black Queen: ['a4'], Black Rook: ['g8', 'h2'], Black Knight: ['b7'], Black Pawn: ['a7', 'b6', 'd6', 'e5', 'f4', 'h7']


Question:
You are given a chess position in FEN: r1b1kb1r/p2p1ppp/1pp1q3/4P3/5P2/4Q3/PPP1B1PP/RN3RK1 w kq - 0 13.
Find all legal moves for the piece on square e3. List the moves in UCI format, separated by commas and spaces.

Answer: e3a3, e3b3, e3b6, e3c1, e3c3, e3c5, e3d2, e3d3, e3d4, e3e4, e3f2, e3f3, e3g3, e3h3


Question:
You are given a chess position in FEN: 8/8/8/5p1p/5N2/5P2/4k1PK/4q3 b - - 7 81.
Identify all forks in this position. A fork occurs when one piece attacks two or more enemy pieces simultaneously. For each fork, provide the key squares in the format: forking_piece>attacked_piece1-attacked_piece2(-attacked_piece3 ...) (e.g., ).

Answer: f4>e2-h5


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 一2


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 一2


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 二19


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 二1


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 六13


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 三6


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 一6


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 十二2


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 八2


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 三1


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 十1


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 一2


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 一18


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 二16


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 十五2


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 六4


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 四4


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 二4


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 八16


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 九4


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 四5


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 四6


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 五4


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 十一7


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 一4


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 七8


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 十七19


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 五13


Question: Go life & death. Black to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 一5


Question: Go life & death. White to play. What's the single best move? Please answer with the coordinate (column–row, e.g., '一2').

Answer: 五3


Question: Go life & death. Black to play. Four candidate points are marked 1–4—choose the best one by its number.

Answer: 4


Question: Go life & death. Black to play. Four candidate points are marked 1–4—choose the best one by its number.

Answer: 2


Question: Go life & death. Black to play. Four candidate points are marked 1–4—choose the best one by its number.

Answer: 2


Question: Go life & death. Black to play. Four candidate points are marked 1–4—choose the best one by its number.

Answer: 4


Question: Go life & death. Black to play. Four candidate points are marked 1–4—choose the best one by its number.

Answer: 2


Question: Bobby and Garry are playing chess. If Garry is playing with the black figures and agrees to mirror every move Bobby makes, what is the minimum number of moves in which Bobby can mate his opponent?

Answer: 4


Question: If White is to play, he can always mate Black in 2 moves, regardless of Black's reply. Answer in standard chess algebraic notation (e.g., Qa1, Qh8#). What move should White play first?

Answer: Qa1


Question: In the position below, Black played a move, but right before he pressed the clock, he ran out of time. However, the judge declared a draw instead of awarding a victory to the opponent. Why? Please explain

Answer: The rules of FIDE state that if a player runs out of time, their opponent wins the game IF they have a path to victory. If there is no sufficient material, e.g. a King and a Knight against a King, then the game is declared a draw. In this position, Black played Rxg6 which forces the moves: This leaves White with a King and a Knight against Black’s King. Thus, White did not have a path to victory and the game was declared a draw.


Question: Given the position in the image, White to move and mate in 2. Answer in algebraic notation with the key first move.

Answer: The first move is 1. Qa8. If Black plays Qd4, then White responds with Re3#. Otherwise, White plays either Nc5# or Nd6#, so that Black cannot capture the Knight neither with the Rook or the Queen.


Question: Given the chess position in the image, White must enter all of their moves in advance (premove) so that checkmate is forced in exactly 5 White moves, no matter how Black replies. Write the full winning sequence for White in algebraic notation.

Answer: The sequence of moves is: 1. Kd6 … 2. Kd7 … 3. Qb5 … 4. Kc7 … 5. Qb7#


Question: White to play. Is this game a win for White, Black, or a draw?

Answer: White


Question: What does this table represent?

Answer: The digits represent the minimum number of knight-moves needed to reach the respective cells, starting from the center.


Question: Your goal is to switch the positions of the three white knights with the positions of the three black knights. What is the least number of moves required to do this?

Answer: 16


Question: The following game is played under very specific rules – no pinned piece checks the opposite king. How can White mate Black in 2 moves?

Answer: First, White plays f3 and threatens mate with Qxe2. Indeed, blocking with the black rook on d4 will not help, because it will become pinned, which means that the rook on d6 will become unpinned, which will make the bishop on b6 pinned, and that will unpin the knight on c7, resulting in a mate. Below are listed all variations of the game. 1. … Rd5 2. Qxe2# 2. … Bxa5 2. Kc8# 3. … Bxc7 2. Nxc7# 4. … Bxe8 2. Kxe8# 5. … Qxe7+ 2. Kxe7# 6. … Rd2 2. Bxd2# 7. … Rxd6+ 2. Qxd6#


Question: White to move. Give a forcing sequence that drives the black king to the square d3, even if Black tries to avoid it.

Answer: 1. Qc3+ Ka2 2. Qc1 Kb3 3. Qa1 Kc2 4. Qa2+ Kc3 5. Qb1 Kd2 6. Qb2+ Kd1 7. Qa2 Kc1 8. Qb3 Kd2 9. Qb1 Kc3 10. Qa2 Kd3 If 4. … Kc1, then 5. Qb3 and we get to the position in move 8. If 4. … Kd1, then 5. Qb1 Kd2 6. Qb2+ and we get to the position in move 6.


Question: What is unusual about this chess puzzle?

Answer: What is so unusual about this puzzle is that there is only one possible income of the game.


Question: The first four moves played by White are 1. f3, 2. Kf2, 3. Kg3, 4. Kh4. If White gets mated in the fourth move, what could be the moves played by Black?

Answer: The game proceeds as follows: 1. f3 e5 (or e6) 2. Kf2 Qf6 3. Kg3 Qxf3+ 4. Kh4 Be7#


Question: What is the smallest number of moves needed to result in this unusual position?

Answer: 4


Question: Which is the best move for White in this position?

Answer: The best move is 1. Rc8+. Then either 1. … Kxb7 2. Rxd8, or 1. … Rxc8 2. Qxa7 Kxa7 3. bxc8 = N+, and Black loses both the Rook and the Queen.


Question: White starts and forces Black to mate him in 8 moves.

Answer: 1. Nb1+ Kb3 2. Qd1+ Rc23 3. Bc1 axb6 4. Ra1 b5 5. Rh1 bxc4 6. Ke1 c3 7. Ng1 f3 8. Bf1 f2#


Question: In this position, what is the hidden irregularity on the board?

Answer: There is one extra black pawn: Black has 9 pawns on the board.


Question: Find a move for White, which does not result in a mate.

Answer: Rc6+.


Question: White to move and mate in 1. Remark: There is only one correct answer.

Answer: Qa3#


Question: The white king has made himself invisible. Where is he?

Answer: The white king is on c3.


Question: Design a game that takes less than 35 moves to get to the position below.

Answer: One possible solution is: 1.d3 h6 2.Bxh6 f5 3.Qd2 f4 4.Qxf4 a5 5.Qxc7 Kf7 6.g3 Kg6 7.Bg2 Kh5 8.Bxb7 Kg4 9.Nf3 Kh3 10.Bxc8 e5 11.Bxg7 e4 12.Kd2 e3+ 13.Kxe3 Kg2 14.Ng1 Kf1 15.Kf3 Ke1 16.Qxa5+ Bb4 17.Nc3+ Kd2 18.Rf1 Rh3 19.Bxd7 Nh6 20.Nd1 Kc1 21.Bxh6+ Kb1 22.Bc1 Na6 23.Kg2 Rc8 24.Bxh3 Rc3 25.Nxc3+ Ka1 26.Nb1 Nc5 27.Rd1 Be1 28.Qxe1 Ne4 29.Kf1 Nd2+ 30.Rxd2 Qd5 31.Qd1 Qg2+ 32.Ke1 Qf1+ 33.Bxf1


Question: In the position shown, it is White to move. Is there a move that guarantees checkmate on White's second move no matter what Black plays? If yes, what is White's first move?

Answer: Yes. White should play Rh6. If Black moves the bishop, then White plays Rxh7# and it is checkmate. If Black captures the rook with the g-pawn (gxh6), then White plays g7# and it is checkmate.


Question: What was the last move made in this game?

Answer: The last move was white king takes black knight on c1.


Question: If Black just made a move in this game, what is the minimum amount of moves that have been played?

Answer: 8


Question: It is White’s move next. Is this game a win for Black or a draw?

Answer: draw


Question: If you know that the following game has been monochromatic, i.e. no piece has moved from black to white square or vice-versa, which one is the correct position of the bishop – e3 or e4?

Answer: e3


Question: White plays and mates in half a move. How is it possible?

Answer: White completes his castle by putting the rook on f1 and mating Black.


Question: Is it possible the following chess position to occur in a game?

Answer: No


Question: On which spot was the white queen captured?

Answer: h6


Question: Imagine the following game occurs on a cylindrical board, on which the a-file and h-file are attached to each other. White plays first and mates Black in 2 moves.

Answer: White: 1.Ra5! and next move 2.Ra1#


Question: The following position occurs in a real game, right after one of the pieces gets knocked off the board. What was the piece?

Answer: It was a black knight.


Question: Place only 2 rooks and 1 knight on the board, so that the Black player is mated.

Answer: You can place the rooks on c5 and e5, and the knight on f5.


Question: In the diagram (note: the back rank shown is actually the 8th rank, since Black's king and queen have swapped files after pawn promotions), it is White to move. How can White force a checkmate in 4 moves?

Answer: White plays 1.Kd7! (from b8 to d7). Black has only knight moves. If 1...Na3 or 1...Nc3 or 1...Nh3, then 2.Kc5 and 3.Kd3# (mate). If 1...Nf3, then 2.Kc5 Ne5 3.Qxe5 and 4.Kd3#.