Chess Puzzle #AIUnQ — Advanced, Black to move, middlegame

Position

White: king b1; rook d1; knights c4/f3; pawns a2/b3/f4/g2/h2. Black: king f7; rook d8; knight d3; pawns a3/f6/g7/h6. White is ahead by 4 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: Kc2 — king b1→c2. Now Black to move.
2. Best move: Nb4+ — knight d3→b4, gives check. Opponent replies Kc1 (king c2→c1).
3. Best move: Nxa2+ — knight b4→a2, captures pawn, gives check. Opponent replies Kb1 (king c1→b1).
4. Best move: Nc3+ — knight a2→c3, gives check.

Tactical themes

advantage, endgame, long. The key move Nxa2+ captures with check, forcing a response.

Position data

FEN: 3r4/5kp1/5p1p/8/2N2P2/pP1n1N2/P5PP/1K1R4 w - - 4 32

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