Chess Puzzle #iS2Tw — Advanced, Black to move, middlegame

Position

White: king e1; queen a4; rooks c1/h1; bishop g3; knight g1; pawns a3/c3/d4/e3/f2/g2/h2. Black: king e7; queen d5; rooks a8/h8; knights a6/e4; pawns a7/b6/c7/e6/f7/g5/h6. Material is balanced. Black to move.

Solution (4 moves)

1. Opponent setup: Qxa6 — queen a4→a6, captures knight. Now Black to move.
2. Best move: Nxg3 — knight e4→g3, captures bishop. Opponent replies hxg3 (pawn h2→g3, captures knight).
3. Best move: Qxg2 — queen d5→g2, captures pawn. Opponent replies Rh5 (rook h1→h5).
4. Best move: Qxg1+ — queen g2→g1, captures knight, gives check. Opponent replies Qf1 (queen a6→f1).
5. Best move: Qxf1+ — queen g1→f1, captures queen, gives check.

Tactical themes

discovered attack, equality, middlegame, very long. The key move Qxg1+ captures with check, forcing a response.

Position data

FEN: r6r/p1p1kp2/np2p2p/3q2p1/Q2Pn3/P1P1P1B1/5PPP/2R1K1NR w K - 2 14

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