Chess Puzzle #oGppL — Advanced, White to move, middlegame

Position

White: king g2; queen g4; rook e2; bishop b7; knight h6; pawns a2/b3/f4/g5/h2. Black: king g8; queen d1; rook e8; bishop f8; knight b2; pawns a7/b6/c4/c5/f7/g7/h7. Black is ahead by 2 points of material. White to move.

Solution (4 moves)

1. Opponent setup: gxh6 — pawn g7→h6, captures knight. Now White to move.
2. Best move: gxh6+ — pawn g5→h6, captures pawn, gives check. Opponent replies Kh8 (king g8→h8).
3. Best move: Qg7+ — queen g4→g7, gives check. Opponent replies Bxg7 (bishop f8→g7, captures queen).
4. Best move: Rxe8+ — rook e2→e8, captures rook, gives check. Opponent replies Bf8 (bishop g7→f8).
5. Best move: Rxf8# — rook e8→f8, captures bishop, delivers checkmate.

Tactical themes

discovered attack, kingside attack, master, mate, mate in 4, middlegame, sacrifice, very long. The combination ends with Rxf8# delivering checkmate.

Position data

FEN: 4rbk1/pB3ppp/1p5N/2p3P1/2p2PQ1/1P6/Pn2R1KP/3q4 b - - 5 23

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