Chess Puzzle #J9JmC — Master, Black to move, endgame

Position

White: king c3; knight d1. Black: king a2; pawns a4/b3. White is ahead by 1 point of material. Black to move.

Solution (4 moves)

1. Opponent setup: Nb2 — knight d1→b2. Now Black to move.
2. Best move: a3 — pawn a4→a3. Opponent replies Nd3 (knight b2→d3).
3. Best move: Kb1 — king a2→b1. Opponent replies Kxb3 (king c3→b3, captures pawn).
4. Best move: a2 — pawn a3→a2. Opponent replies Kc4 (king b3→c4).
5. Best move: a1=Q — pawn a2→a1, promotes to queen.

Tactical themes

advanced pawn, crushing, endgame, knight endgame, promotion, very long. The key move is a3.

Position data

FEN: 8/8/8/8/p7/1pK5/k7/3N4 w - - 2 73

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