Chess Puzzle #eHouY — Advanced, White to move, endgame

Position

White: king b3; bishop c3; pawns a6/d4/f4. Black: king e6; rook e2; pawns c6/f6/g7/h4. Black is ahead by 3 points of material. White to move.

Solution (4 moves)

1. Opponent setup: h3 — pawn h4→h3. Now White to move.
2. Best move: a7 — pawn a6→a7. Opponent replies h2 (pawn h3→h2).
3. Best move: a8=Q — pawn a7→a8, promotes to queen. Opponent replies h1=Q (pawn h2→h1, promotes to queen).
4. Best move: Qe8+ — queen a8→e8, gives check. Opponent replies Kf5 (king e6→f5).
5. Best move: Qxe2 — queen e8→e2, captures rook.

Tactical themes

advanced pawn, endgame, equality, promotion, skewer, very long. The key move is a7.

Position data

FEN: 8/6p1/P1p1kp2/8/3P1P1p/1KB5/4r3/8 b - - 0 40

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