Chess Puzzle #BS9J1 — Expert, Black to move, endgame

Position

White: king g3; knight e4; pawn f4. Black: king c4; bishop e6; pawn b5. Material is balanced. Black to move.

Solution (10 moves)

1. Opponent setup: Kf3 — king g3→f3. Now Black to move.
2. Best move: Bd5 — bishop e6→d5. Opponent replies Ke3 (king f3→e3).
3. Best move: Bxe4 — bishop d5→e4, captures knight. Opponent replies Kxe4 (king e3→e4, captures bishop).
4. Best move: b4 — pawn b5→b4. Opponent replies Ke3 (king e4→e3).
5. Best move: Kc3 — king c4→c3. Opponent replies f5 (pawn f4→f5).
6. Best move: b3 — pawn b4→b3. Opponent replies f6 (pawn f5→f6).
7. Best move: b2 — pawn b3→b2. Opponent replies f7 (pawn f6→f7).
8. Best move: b1=Q — pawn b2→b1, promotes to queen. Opponent replies f8=Q (pawn f7→f8, promotes to queen).
9. Best move: Qe1+ — queen b1→e1, gives check. Opponent replies Kf3 (king e3→f3).
10. Best move: Qf1+ — queen e1→f1, gives check. Opponent replies Ke4 (king f3→e4).
11. Best move: Qxf8 — queen f1→f8, captures queen.

Tactical themes

advanced pawn, crushing, endgame, promotion, quiet move, skewer, very long. The key move is Bd5.

Position data

FEN: 8/8/4b3/1p6/2k1NP2/6K1/8/8 w - - 3 53

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