Chess Puzzle #Ldsoz — Master, Black to move, middlegame

Position

White: king g1; queen d1; rooks a1/f7; bishops c1/e2; knight g2; pawns b3/c6/d4/e3. Black: king b8; queen g3; rook h8; knight e4; pawns a7/b7/e6/g4/g5. White is ahead by 10 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Rxb7+ — rook f7→b7, captures pawn, gives check. Now Black to move.
2. Best move: Kc8 — king b8→c8. Opponent replies Rb8+ (rook b7→b8, gives check).
3. Best move: Kxb8 — king c8→b8, captures rook. Opponent replies c7+ (pawn c6→c7, gives check).
4. Best move: Qxc7 — queen g3→c7, captures pawn. Opponent replies Bxg4 (bishop e2→g4, captures pawn).
5. Best move: Qh2+ — queen c7→h2, gives check.

Tactical themes

crushing, middlegame, very long. The key move is Kc8.

Position data

FEN: 1k5r/pp3R2/2P1p3/6p1/3Pn1p1/1P2P1q1/4B1N1/R1BQ2K1 w - - 1 25

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