Chess Puzzle #FHPQB — Intermediate, Black to move, middlegame

Position

White: king f2; queens a8/d8; rook b1; pawns d5/g2/h3. Black: king g7; queen d4; bishop f6; pawns a5/b6/c7/g6/h7. White is ahead by 9 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Kg3 — king f2→g3. Now Black to move.
2. Best move: Be5+ — bishop f6→e5, gives check. Opponent replies Kf3 (king g3→f3).
3. Best move: Qd3+ — queen d4→d3, gives check. Opponent replies Kf2 (king f3→f2).
4. Best move: Bg3+ — bishop e5→g3, gives check. Opponent replies Kg1 (king f2→g1).
5. Best move: Qxb1# — queen d3→b1, captures rook, delivers checkmate.

Tactical themes

endgame, fork, mate, mate in 4, very long. The combination ends with Qxb1# delivering checkmate.

Position data

FEN: Q2Q4/2p3kp/1p3bp1/p2P4/3q4/7P/5KP1/1R6 w - - 1 37

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