Chess Puzzle #KMpvv — Intermediate, White to move, middlegame

Position

White: king h1; queen e8; rook e1; pawns a7/f3/g2/h3. Black: king h8; queen b2; rook g8; pawns c3/d5/f5/f6/h7. Black is ahead by 1 point of material. White to move.

Solution (4 moves)

1. Opponent setup: Qa2 — queen b2→a2. Now White to move.
2. Best move: Qxg8+ — queen e8→g8, captures rook, gives check. Opponent replies Kxg8 (king h8→g8, captures queen).
3. Best move: Re8+ — rook e1→e8, gives check. Opponent replies Kf7 (king g8→f7).
4. Best move: a8=Q — pawn a7→a8, promotes to queen. Opponent replies Qb1+ (queen a2→b1, gives check).
5. Best move: Kh2 — king h1→h2.

Tactical themes

advanced pawn, attraction, crushing, endgame, promotion, sacrifice, very long. The key move Qxg8+ captures with check, forcing a response.

Position data

FEN: 4Q1rk/P6p/5p2/3p1p2/8/2p2P1P/1q4P1/4R2K b - - 1 49

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