Chess Puzzle #RsHea — Expert, White to move, endgame

Position

White: king b5; pawns a4/b6/h5. Black: king g5; bishop f2; pawns a5/h6. Black is ahead by 2 points of material. White to move.

Solution (6 moves)

1. Opponent setup: Kxh5 — king g5→h5, captures pawn. Now White to move.
2. Best move: Kxa5 — king b5→a5, captures pawn. Opponent replies Kg4 (king h5→g4).
3. Best move: Kb5 — king a5→b5. Opponent replies h5 (pawn h6→h5).
4. Best move: a5 — pawn a4→a5. Opponent replies h4 (pawn h5→h4).
5. Best move: a6 — pawn a5→a6. Opponent replies h3 (pawn h4→h3).
6. Best move: a7 — pawn a6→a7. Opponent replies h2 (pawn h3→h2).
7. Best move: a8=Q — pawn a7→a8, promotes to queen.

Tactical themes

advanced pawn, bishop endgame, crushing, endgame, promotion, quiet move, very long. The key move Kxa5 wins material.

Position data

FEN: 8/8/1P5p/pK4kP/P7/8/5b2/8 b - - 2 50

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