Chess Puzzle #E1eC2 — Advanced, White to move, endgame

Position

White: king a1; pawns g5/h5. Black: king f3; pawns a3/b3/h6. Black is ahead by 1 point of material. White to move.

Solution (4 moves)

1. Opponent setup: b2+ — pawn b3→b2, gives check. Now White to move.
2. Best move: Kb1 — king a1→b1. Opponent replies hxg5 (pawn h6→g5, captures pawn).
3. Best move: h6 — pawn h5→h6. Opponent replies g4 (pawn g5→g4).
4. Best move: h7 — pawn h6→h7. Opponent replies g3 (pawn g4→g3).
5. Best move: h8=Q — pawn h7→h8, promotes to queen.

Tactical themes

advanced pawn, crushing, endgame, pawn endgame, promotion, very long. The key move is Kb1.

Position data

FEN: 8/8/7p/6PP/8/pp3k2/8/K7 b - - 0 68

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