Chess Puzzle #Pn9eo — Advanced, White to move, endgame

Position

White: king g3; knight b3; pawns a6/e3/f5. Black: king e5; bishop g2; knight c6; pawns e4/h3. Black is ahead by 2 points of material. White to move.

Solution (3 moves)

1. Opponent setup: Kxf5 — king e5→f5, captures pawn. Now White to move.
2. Best move: Nd4+ — knight b3→d4, gives check. Opponent replies Nxd4 (knight c6→d4, captures knight).
3. Best move: a7 — pawn a6→a7. Opponent replies Nc6 (knight d4→c6).
4. Best move: a8=Q — pawn a7→a8, promotes to queen.

Tactical themes

advanced pawn, endgame, equality, long, promotion, sacrifice. The key move is Nd4+.

Position data

FEN: 8/8/P1n5/4kP2/4p3/1N2P1Kp/6b1/8 b - - 0 42

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