Chess Puzzle #AUDqn — Intermediate, White to move, middlegame

Position

White: king g1; queen c2; rook d1; bishops b2/h7; knights c4/f3; pawns a2/f2/g2/h2. Black: king e8; queen c7; rooks a8/h8; bishops c8/e7; knight d7; pawns a4/b7/c6/e5/f6/g7. Black is ahead by 4 points of material. White to move.

Solution (4 moves)

1. Opponent setup: Nf8 — knight d7→f8. Now White to move.
2. Best move: Bg6+ — bishop h7→g6, gives check. Opponent replies Nxg6 (knight f8→g6, captures bishop).
3. Best move: Qxg6+ — queen c2→g6, captures knight, gives check. Opponent replies Kf8 (king e8→f8).
4. Best move: Ng5 — knight f3→g5. Opponent replies fxg5 (pawn f6→g5, captures knight).
5. Best move: Bxe5 — bishop b2→e5, captures pawn.

Tactical themes

crushing, deflection, exposed king, middlegame, quiet move, sacrifice, very long. The key move Qxg6+ captures with check, forcing a response.

Position data

FEN: r1b1k2r/1pqnb1pB/2p2p2/4p3/p1N5/5N2/PBQ2PPP/3R2K1 b kq - 0 20

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