Chess Puzzle #3JKeS — Advanced, Black to move, middlegame

Position

White: king g1; queen a6; rooks c1/e6; bishop g2; pawns a5/d4/e3/f2/h4. Black: king f7; queen g7; rooks b2/d7; bishop g3; pawns d5/e4/f5/h5. White is ahead by 1 point of material. Black to move.

Solution (4 moves)

1. Opponent setup: fxg3 — pawn f2→g3, captures bishop. Now Black to move.
2. Best move: Qxg3 — queen g7→g3, captures pawn. Opponent replies Rf6+ (rook e6→f6, gives check).
3. Best move: Kg7 — king f7→g7. Opponent replies Rg6+ (rook f6→g6, gives check).
4. Best move: Qxg6 — queen g3→g6, captures rook. Opponent replies Qxg6+ (queen a6→g6, captures queen, gives check).
5. Best move: Kxg6 — king g7→g6, captures queen.

Tactical themes

advantage, middlegame, very long. The key move Qxg3 wins material.

Position data

FEN: 8/3r1kq1/Q3R3/P2p1p1p/3Pp2P/4P1b1/1r3PB1/2R3K1 w - - 2 38

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