Chess Puzzle #9gFUw — Master, White to move, endgame

Position

White: king e2; bishop b8; knight f3; pawns a7/d4. Black: king h3; rook f1; pawns e6/f5/g2. Material is balanced. White to move.

Solution (3 moves)

1. Opponent setup: Rxf3 — rook f1→f3, captures knight. Now White to move.
2. Best move: a8=Q — pawn a7→a8, promotes to queen. Opponent replies Rb3 (rook f3→b3).
3. Best move: Qa1 — queen a8→a1. Opponent replies Rxb8 (rook b3→b8, captures bishop).
4. Best move: Kf2 — king e2→f2.

Tactical themes

advanced pawn, advantage, endgame, long, promotion, quiet move. The key move is a8=Q.

Position data

FEN: 1B6/P7/4p3/5p2/3P4/5N1k/4K1p1/5r2 b - - 5 56

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