Chess Puzzle #DI2oZ — Advanced, Black to move, middlegame

Position

White: king a3; queen c4; rooks a1/h1; knight d4; pawns a2/b4/c2/d5/f2/g3/h2. Black: king b8; queen h8; rook e8; bishop g4; knight e4; pawns a7/b7/d6/f5/h5. White is ahead by 4 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: f3 — pawn f2→f3. Now Black to move.
2. Best move: Nd2 — knight e4→d2. Opponent replies Qd3 (queen c4→d3).
3. Best move: Re3 — rook e8→e3. Opponent replies Qxe3 (queen d3→e3, captures rook).
4. Best move: Nc4+ — knight d2→c4, gives check. Opponent replies Kb3 (king a3→b3).
5. Best move: Nxe3 — knight c4→e3, captures queen.

Tactical themes

advantage, attraction, clearance, fork, middlegame, pin, sacrifice, very long. The key move is Nd2.

Position data

FEN: 1k2r2q/pp6/3p4/3P1p1p/1PQNn1b1/K5P1/P1P2P1P/R6R w - - 1 27

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