Chess Puzzle #uHFmZ — Expert, Black to move, endgame

Position

White: king g5; rook b5; pawn a5. Black: king e7; pawns a6/d4/e6/h6/h7. White is ahead by 1 point of material. Black to move.

Solution (4 moves)

1. Opponent setup: Kxh6 — king g5→h6, captures pawn. Now Black to move.
2. Best move: axb5 — pawn a6→b5, captures rook. Opponent replies a6 (pawn a5→a6).
3. Best move: d3 — pawn d4→d3. Opponent replies a7 (pawn a6→a7).
4. Best move: d2 — pawn d3→d2. Opponent replies a8=Q (pawn a7→a8, promotes to queen).
5. Best move: d1=Q — pawn d2→d1, promotes to queen.

Tactical themes

advanced pawn, crushing, endgame, hanging piece, promotion, very long. The key move axb5 wins material.

Position data

FEN: 8/4k2p/p3p2p/PR4K1/3p4/8/8/8 w - - 0 35

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