Chess Puzzle #Ob7wm — Expert, Black to move, middlegame

Position

White: king g2; queen f5; rooks a1/e1; knight e6; pawns a4/b2/d4/e3/f2/h2. Black: king h8; queen d6; rook g8; knight e4; pawns a5/b4/c6/d5/f6/h6. White is ahead by 5 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Kf3 — king g2→f3. Now Black to move.
2. Best move: Qxh2 — queen d6→h2, captures pawn. Opponent replies Rf1 (rook e1→f1).
3. Best move: Qg2+ — queen h2→g2, gives check. Opponent replies Ke2 (king f3→e2).
4. Best move: Ng3+ — knight e4→g3, gives check. Opponent replies Kd2 (king e2→d2).
5. Best move: Nxf5 — knight g3→f5, captures queen.

Tactical themes

crushing, middlegame, pin, very long. The key move Qxh2 wins material.

Position data

FEN: 6rk/8/2pqNp1p/p2p1Q2/Pp1Pn3/4P3/1P3PKP/R3R3 w - - 1 32

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