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

Position

White: king f3; rook c8; pawns a7/e3/f2/g3/h2. Black: king g7; rook f5; pawns b2/f7/g6. White is ahead by 2 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: Kg2 — king f3→g2. Now Black to move.
2. Best move: b1=Q — pawn b2→b1, promotes to queen. Opponent replies a8=Q (pawn a7→a8, promotes to queen).
3. Best move: Qb2 — queen b1→b2. Opponent replies Rc1 (rook c8→c1).
4. Best move: Qxc1 — queen b2→c1, captures rook.

Tactical themes

advanced pawn, advantage, endgame, long, promotion. The key move is b1=Q.

Position data

FEN: 2R5/P4pk1/6p1/5r2/8/4PKP1/1p3P1P/8 w - - 1 45

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