Chess Puzzle #5LVUs — Advanced, Black to move, endgame

Position

White: king f7; bishop d4; pawns a3/c3/g7. Black: king b3; rook a8; pawns a4/d5. Black is ahead by 1 point of material. Black to move.

Solution (4 moves)

1. Opponent setup: g8=Q — pawn g7→g8, promotes to queen. Now Black to move.
2. Best move: Rxg8 — rook a8→g8, captures queen. Opponent replies Kxg8 (king f7→g8, captures rook).
3. Best move: Kxa3 — king b3→a3, captures pawn. Opponent replies Kf7 (king g8→f7).
4. Best move: Kb3 — king a3→b3. Opponent replies Bc5 (bishop d4→c5).
5. Best move: Kxc3 — king b3→c3, captures pawn.

Tactical themes

crushing, endgame, very long. The key move Rxg8 wins material.

Position data

FEN: r7/5KP1/8/3p4/p2B4/PkP5/8/8 w - - 1 50

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