Chess Puzzle #jIsNk — Expert, Black to move, middlegame

Position

White: king b1; queen g7; rooks g1/h7; bishop f5; knight g4; pawns b2/c2/d5/e4/f3. Black: king b8; queen d8; rook f8; bishops a6/f4; knight c5; pawns b3/c7/d6/e5. White is ahead by 3 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: cxb3 — pawn c2→b3, captures pawn. Now Black to move.
2. Best move: Bd3+ — bishop a6→d3, gives check. Opponent replies Ka2 (king b1→a2).
3. Best move: Kb7 — king b8→b7. Opponent replies Qxc7+ (queen g7→c7, captures pawn, gives check).
4. Best move: Qxc7 — queen d8→c7, captures queen.

Tactical themes

crushing, long, middlegame. The key move is Bd3+.

Position data

FEN: 1k1q1r2/2p3QR/b2p4/2nPpB2/4PbN1/1p3P2/1PP5/1K4R1 w - - 0 37

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