Chess Puzzle #0TZes — Advanced, White to move, middlegame

Position

White: king g1; queen c3; rook b4; bishop c2; pawns a2/f2/f3/h3. Black: king g7; queen d5; rooks e8/f7; knight e7; pawns a4/d6/f5/g6/h7. Black is ahead by 6 points of material. White to move.

Solution (4 moves)

1. Opponent setup: Kh6 — king g7→h6. Now White to move.
2. Best move: Rh4+ — rook b4→h4, gives check. Opponent replies Kg5 (king h6→g5).
3. Best move: f4+ — pawn f3→f4, gives check. Opponent replies Kxh4 (king g5→h4, captures rook).
4. Best move: Qg3+ — queen c3→g3, gives check. Opponent replies Kh5 (king h4→h5).
5. Best move: Qg5# — queen g3→g5, delivers checkmate.

Tactical themes

mate, mate in 4, middlegame, sacrifice, very long. The combination ends with Qg5# delivering checkmate.

Position data

FEN: 4r3/4nrkp/3p2p1/3q1p2/pR6/2Q2P1P/P1B2P2/6K1 b - - 1 32

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