Chess Puzzle #AK9sn — Advanced, Black to move, middlegame

Position

White: king b2; bishop f1; pawns a3/c3/c4/e3/f2/g3/h4. Black: king a4; bishop d1; pawns a7/b7/c5/e4/f5/g4/h5. Material is balanced. Black to move.

Solution (5 moves)

1. Opponent setup: Kc1 — king b2→c1. Now Black to move.
2. Best move: Kxa3 — king a4→a3, captures pawn. Opponent replies Kxd1 (king c1→d1, captures bishop).
3. Best move: Kb2 — king a3→b2. Opponent replies Kd2 (king d1→d2).
4. Best move: a5 — pawn a7→a5. Opponent replies Be2 (bishop f1→e2).
5. Best move: a4 — pawn a5→a4. Opponent replies Bd1 (bishop e2→d1).
6. Best move: a3 — pawn a4→a3.

Tactical themes

bishop endgame, crushing, endgame, master, quiet move, sacrifice, very long. The key move Kxa3 wins material.

Position data

FEN: 8/pp6/8/2p2p1p/k1P1p1pP/P1P1P1P1/1K3P2/3b1B2 w - - 6 40

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