Chess Puzzle #obOHq — Master, White to move, middlegame

Position

White: king g1; queen g4; rook f1; bishops b3/f4; knight g3; pawns a3/b2/c2/f2/g2/h2. Black: king h8; queen d8; rooks a8/e8; bishops b7/c5; pawns a6/d5/f6/g7/h7. Black is ahead by 1 point of material. White to move.

Solution (4 moves)

1. Opponent setup: Bd6 — bishop c5→d6. Now White to move.
2. Best move: Bxd6 — bishop f4→d6, captures bishop. Opponent replies Qxd6 (queen d8→d6, captures bishop).
3. Best move: Qxg7+ — queen g4→g7, captures pawn, gives check. Opponent replies Kxg7 (king h8→g7, captures queen).
4. Best move: Nf5+ — knight g3→f5, gives check. Opponent replies Kg6 (king g7→g6).
5. Best move: Nxd6 — knight f5→d6, captures queen.

Tactical themes

advantage, attraction, fork, middlegame, sacrifice, very long. The key move Qxg7+ captures with check, forcing a response.

Position data

FEN: r2qr2k/1b4pp/p4p2/2bp4/5BQ1/PB4N1/1PP2PPP/5RK1 b - - 2 21

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