Chess Puzzle #ZkFRL — Master, Black to move, endgame

Position

White: king f2; bishop h4; pawns a3/d4/f4. Black: king h5; pawns a5/b5/d5/e6/f5/g4. Material is balanced. Black to move.

Solution (7 moves)

1. Opponent setup: Kg3 — king f2→g3. Now Black to move.
2. Best move: b4 — pawn b5→b4. Opponent replies axb4 (pawn a3→b4, captures pawn).
3. Best move: a4 — pawn a5→a4. Opponent replies Kg2 (king g3→g2).
4. Best move: Kxh4 — king h5→h4, captures bishop. Opponent replies b5 (pawn b4→b5).
5. Best move: a3 — pawn a4→a3. Opponent replies b6 (pawn b5→b6).
6. Best move: a2 — pawn a3→a2. Opponent replies b7 (pawn b6→b7).
7. Best move: a1=Q — pawn a2→a1, promotes to queen. Opponent replies b8=Q (pawn b7→b8, promotes to queen).
8. Best move: Qa2+ — queen a1→a2, gives check.

Tactical themes

advanced pawn, bishop endgame, crushing, endgame, promotion, quiet move, very long. The key move is b4.

Position data

FEN: 8/8/4p3/pp1p1p1k/3P1PpB/P7/5K2/8 w - - 2 55

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