Chess Puzzle #o2OlF — Expert, White to move, endgame

Position

White: king c3; rook a5; pawns a4/b6/h3. Black: king g6; rook a2; bishop d7; pawns f4/f7/g5. Black is ahead by 3 points of material. White to move.

Solution (4 moves)

1. Opponent setup: f3 — pawn f4→f3. Now White to move.
2. Best move: b7 — pawn b6→b7. Opponent replies Ra3+ (rook a2→a3, gives check).
3. Best move: Kb2 — king c3→b2. Opponent replies Rxa4 (rook a3→a4, captures pawn).
4. Best move: Rxa4 — rook a5→a4, captures rook. Opponent replies Bxa4 (bishop d7→a4, captures rook).
5. Best move: b8=Q — pawn b7→b8, promotes to queen.

Tactical themes

advanced pawn, crushing, defensive move, endgame, promotion, very long. The key move is b7.

Position data

FEN: 8/3b1p2/1P4k1/R5p1/P4p2/2K4P/r7/8 b - - 0 39

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