Chess Puzzle #KgmmV — Expert, White to move, middlegame

Position

White: king h1; queen d8; rook g1; knight d7; pawns a3/b2/c3/d4/f4/h2. Black: king g7; queen b7; rook h5; knight f5; pawns a5/b4/d5/e6/f7/g6. Material is balanced. White to move.

Solution (4 moves)

1. Opponent setup: Rh8 — rook h5→h8. Now White to move.
2. Best move: Qf6+ — queen d8→f6, gives check. Opponent replies Kg8 (king g7→g8).
3. Best move: Rxg6+ — rook g1→g6, captures pawn, gives check. Opponent replies fxg6 (pawn f7→g6, captures rook).
4. Best move: Qf8+ — queen f6→f8, gives check. Opponent replies Kh7 (king g8→h7).
5. Best move: Nf6# — knight d7→f6, delivers checkmate.

Tactical themes

deflection, endgame, mate, mate in 4, sacrifice, very long. The combination ends with Nf6# delivering checkmate.

Position data

FEN: 3Q4/1q1N1pk1/4p1p1/p2p1n1r/1p1P1P2/P1P5/1P5P/6RK b - - 3 36

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