Chess Puzzle #iFAsF — Advanced, Black to move, endgame

Position

White: king e3; rook a8; pawns c3/d6/f4/h6. Black: king g4; bishop d5; pawns a2/b5/d7/e6. White is ahead by 2 points of material. Black to move.

Solution (5 moves)

1. Opponent setup: h7 — pawn h6→h7. Now Black to move.
2. Best move: Bxa8 — bishop d5→a8, captures rook. Opponent replies h8=Q (pawn h7→h8, promotes to queen).
3. Best move: a1=Q — pawn a2→a1, promotes to queen. Opponent replies Qg7+ (queen h8→g7, gives check).
4. Best move: Kh3 — king g4→h3. Opponent replies Qh6+ (queen g7→h6, gives check).
5. Best move: Kg2 — king h3→g2. Opponent replies Qg5+ (queen h6→g5, gives check).
6. Best move: Kf1 — king g2→f1.

Tactical themes

advanced pawn, advantage, defensive move, endgame, hanging piece, promotion, very long. The key move Bxa8 wins material.

Position data

FEN: R7/3p4/3Pp2P/1p1b4/5Pk1/2P1K3/p7/8 w - - 1 50

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