Chess Puzzle #Kio6D — Advanced, Black to move, middlegame

Position

White: king b1; queen b2; rooks g1/g4; bishop a5; pawns a2/b3/d4/e5/h5. Black: king g8; queen f8; rook f7; knights b6/d5; pawns b7/c6/g7/h7. White is ahead by 3 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Bxb6 — bishop a5→b6, captures knight. Now Black to move.
2. Best move: Rf1+ — rook f7→f1, gives check. Opponent replies Rxf1 (rook g1→f1, captures rook).
3. Best move: Qxf1+ — queen f8→f1, captures rook, gives check. Opponent replies Qc1 (queen b2→c1).
4. Best move: Qf5+ — queen f1→f5, gives check. Opponent replies Kb2 (king b1→b2).
5. Best move: Qxg4 — queen f5→g4, captures rook.

Tactical themes

equality, fork, middlegame, very long. The key move Qxf1+ captures with check, forcing a response.

Position data

FEN: 5qk1/1p3rpp/1np5/B2nP2P/3P2R1/1P6/PQ6/1K4R1 w - - 1 36

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