Chess Puzzle #5XS5l — Advanced, Black to move, middlegame

Position

White: king e3; queen f3; rook a1; bishop c4; knights c3/h8; pawns a2/b2/c2/d3/e4. Black: king c8; queen h2; bishop g7; knight g2; pawns a7/b7/c5/e5/e7/g6/h7. White is ahead by 6 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Kd2 — king e3→d2. Now Black to move.
2. Best move: Nh4+ — knight g2→h4, gives check. Opponent replies Qe2 (queen f3→e2).
3. Best move: Nf3+ — knight h4→f3, gives check. Opponent replies Ke3 (king d2→e3).
4. Best move: Qf4+ — queen h2→f4, gives check. Opponent replies Kf2 (king e3→f2).
5. Best move: Nd4+ — knight f3→d4, gives check.

Tactical themes

advantage, discovered attack, middlegame, pin, very long. The key move is Nh4+.

Position data

FEN: 2k4N/pp2p1bp/6p1/2p1p3/2B1P3/2NPKQ2/PPP3nq/R7 w - - 4 21

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