Chess Puzzle #NZ6Up — Expert, Black to move, middlegame

Position

White: king g1; queen f5; rook b1; knight f3; pawns d4/f2/g2/h3. Black: king g8; queen a1; rook e8; pawns b2/b5/c3/d5/f7/h7. White is ahead by 1 point of material. Black to move.

Solution (5 moves)

1. Opponent setup: Ng5 — knight f3→g5. Now Black to move.
2. Best move: Qxb1+ — queen a1→b1, captures rook, gives check. Opponent replies Qxb1 (queen f5→b1, captures queen).
3. Best move: c2 — pawn c3→c2. Opponent replies Qxc2 (queen b1→c2, captures pawn).
4. Best move: Re1+ — rook e8→e1, gives check. Opponent replies Kh2 (king g1→h2).
5. Best move: b1=Q — pawn b2→b1, promotes to queen. Opponent replies Qc8+ (queen c2→c8, gives check).
6. Best move: Kg7 — king g8→g7.

Tactical themes

advanced pawn, advantage, endgame, promotion, sacrifice, very long. The key move Qxb1+ captures with check, forcing a response.

Position data

FEN: 4r1k1/5p1p/8/1p1p1Q2/3P4/2p2N1P/1p3PP1/qR4K1 w - - 2 31

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