Chess Puzzle #RT13J — Expert, White to move, endgame

Position

White: king e4; pawns a2/f2/g5. Black: king c4; knight f8; pawns a7/b7. Black is ahead by 2 points of material. White to move.

Solution (4 moves)

1. Opponent setup: a5 — pawn a7→a5. Now White to move.
2. Best move: f4 — pawn f2→f4. Opponent replies Kc5 (king c4→c5).
3. Best move: Ke5 — king e4→e5. Opponent replies Ng6+ (knight f8→g6, gives check).
4. Best move: Kf5 — king e5→f5. Opponent replies Ne7+ (knight g6→e7, gives check).
5. Best move: Ke6 — king f5→e6.

Tactical themes

crushing, defensive move, endgame, knight endgame, quiet move, very long. The key move is f4.

Position data

FEN: 5n2/pp6/8/6P1/2k1K3/8/P4P2/8 b - - 0 50

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