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

Position

White: king a7; bishop c7; pawns a6/b6. Black: king d7; bishop g2; pawns c2/h3. Material is balanced. Black to move.

Solution (4 moves)

1. Opponent setup: b7 — pawn b6→b7. Now Black to move.
2. Best move: Bxb7 — bishop g2→b7, captures pawn. Opponent replies axb7 (pawn a6→b7, captures bishop).
3. Best move: c1=Q — pawn c2→c1, promotes to queen. Opponent replies b8=Q (pawn b7→b8, promotes to queen).
4. Best move: Qxc7+ — queen c1→c7, captures bishop, gives check. Opponent replies Qxc7+ (queen b8→c7, captures queen, gives check).
5. Best move: Kxc7 — king d7→c7, captures queen.

Tactical themes

advanced pawn, bishop endgame, crushing, endgame, promotion, very long. The key move Qxc7+ captures with check, forcing a response.

Position data

FEN: 8/K1Bk4/PP6/8/8/7p/2p3b1/8 w - - 0 65

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