Chess Puzzle #0ksQ5 — Advanced, Black to move, middlegame

Position

White: king g1; bishop g3; knight f3; pawns c4/d5/g2/g4/h3. Black: king h7; bishop g7; pawns b3/c5/d6/f7/g6/h6. White is ahead by 2 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: Kf1 — king g1→f1. Now Black to move.
2. Best move: Bc3 — bishop g7→c3. Opponent replies Be1 (bishop g3→e1).
3. Best move: b2 — pawn b3→b2. Opponent replies Bxc3 (bishop e1→c3, captures bishop).
4. Best move: b1=Q+ — pawn b2→b1, promotes to queen, gives check.

Why this works

Black's passed pawns on b3 and c5 are the dominant force. After 1...Bc3, Black offers the bishop as bait to lure White's bishop away from controlling the b-file. When White recaptures with 2.Bxc3, the b-pawn advances to 2...b2, and White has no piece left to stop it—the bishop is gone, the knight on f3 is powerless, and the king on f1 is too far away. Black's 3...b1=Q+ (with check, since the new queen gives check along the first rank) forces the white king to move, and the promotion is unstoppable. The quiet move 1...Bc3 is the key: it removes Black's own piece from the board while forcing White into a losing tempo sequence where the bishop's sacrifice doesn't prevent the pawn's march to the eighth rank.

What to practice

Recognize when a passed pawn is so advanced that sacrificing your own piece to decoy the opponent's defender is justified. The pattern: offer your piece on a square the opponent must capture, then push the passed pawn knowing the defender has been traded off. Here, the bishop on c3 is expendable because b2-b1=Q is faster than any White counterplay. Always calculate whether the opponent's recapture gives you a free tempo to advance the passed pawn.

Tactical themes

advanced pawn, crushing, endgame, long, promotion, quiet move. The key move is Bc3.

Position data

FEN: 8/5pbk/3p2pp/2pP4/2P3P1/1p3NBP/6P1/6K1 w - - 0 34

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