Chess Puzzle #wUM3I — Expert, Black to move, middlegame

Position

White: king h1; queen f4; rook b1; knight e8; pawns e6/g2/h4. Black: king g8; queen c3; bishop g7; pawns a2/d5/f6/g6/h5. White is ahead by 3 points of material. Black to move.

Solution (2 moves)

1. Opponent setup: Rb8 — rook b1→b8. Now Black to move.
2. Best move: a1=Q+ — pawn a2→a1, promotes to queen, gives check. Opponent replies Kh2 (king h1→h2).
3. Best move: Kh7 — king g8→h7.

Tactical themes

advanced pawn, crushing, defensive move, endgame, promotion, short. The key move is a1=Q+.

Position data

FEN: 4N1k1/6b1/4Ppp1/3p3p/5Q1P/2q5/p5P1/1R5K w - - 0 45

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