Chess Puzzle #F4dwU — Expert, Black to move, endgame

Position

White: king d2; rook f8; pawn e7. Black: king f4; rook b1; bishop f5; pawn a2. Black is ahead by 3 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: e8=Q — pawn e7→e8, promotes to queen. Now Black to move.
2. Best move: Rb2+ — rook b1→b2, gives check. Opponent replies Kc3 (king d2→c3).
3. Best move: a1=Q — pawn a2→a1, promotes to queen. Opponent replies Rxf5+ (rook f8→f5, captures bishop, gives check).
4. Best move: Kxf5 — king f4→f5, captures rook.

Tactical themes

advanced pawn, crushing, endgame, long, promotion. The key move is Rb2+.

Position data

FEN: 5R2/4P3/8/5b2/5k2/8/p2K4/1r6 w - - 0 68

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