Chess Puzzle #0sR2p — Intermediate, White to move, endgame

Position

White: king b6; pawns a4/b3. Black: king g4; pawns g5/h6. Material is balanced. White to move.

Solution (5 moves)

1. Opponent setup: h5 — pawn h6→h5. Now White to move.
2. Best move: a5 — pawn a4→a5. Opponent replies Kh3 (king g4→h3).
3. Best move: a6 — pawn a5→a6. Opponent replies g4 (pawn g5→g4).
4. Best move: a7 — pawn a6→a7. Opponent replies g3 (pawn g4→g3).
5. Best move: a8=Q — pawn a7→a8, promotes to queen. Opponent replies h4 (pawn h5→h4).
6. Best move: Qh1+ — queen a8→h1, gives check.

Tactical themes

advanced pawn, crushing, endgame, pawn endgame, promotion, quiet move, very long. The key move is a5.

Position data

FEN: 8/8/1K5p/6p1/P5k1/1P6/8/8 b - - 0 46

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