Chess Puzzle #8bIsm — Advanced, Black to move, endgame

Position

White: king b6; bishop b7; knight c7; pawns a7/b4/e5. Black: king g8; rook a3; pawns e6/g4/h3. White is ahead by 1 point of material. Black to move.

Solution (3 moves)

1. Opponent setup: a8=Q+ — pawn a7→a8, promotes to queen, gives check. Now Black to move.
2. Best move: Rxa8 — rook a3→a8, captures queen. Opponent replies Bxa8 (bishop b7→a8, captures rook).
3. Best move: g3 — pawn g4→g3. Opponent replies Nxe6 (knight c7→e6, captures pawn).
4. Best move: g2 — pawn g3→g2.

Tactical themes

advanced pawn, advantage, endgame, long. The key move Rxa8 wins material.

Position data

FEN: 6k1/PBN5/1K2p3/4P3/1P4p1/r6p/8/8 w - - 0 40

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