Chess Puzzle #AkwFb — Intermediate, Black to move, endgame

Position

White: king c2; rook h4; knight f7; pawn f3. Black: king a3; pawns a4/b4/e3/f4/f5. White is ahead by 4 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: Rxf4 — rook h4→f4, captures pawn. Now Black to move.
2. Best move: b3+ — pawn b4→b3, gives check. Opponent replies Kd3 (king c2→d3).
3. Best move: b2 — pawn b3→b2. Opponent replies Kxe3 (king d3→e3, captures pawn).
4. Best move: b1=Q — pawn b2→b1, promotes to queen.

Tactical themes

advanced pawn, crushing, endgame, long, promotion. The key move is b3+.

Position data

FEN: 8/5N2/8/5p2/pp3p1R/k3pP2/2K5/8 w - - 0 50

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