Chess Puzzle #KnXYx — Master, Black to move, middlegame

Position

White: king g1; queen d2; rooks f2/f4; bishop b2; pawns b5/c5/d4/e3/g2/h2. Black: king g8; queen g6; rook a2; bishop h3; knight e4; pawns d5/f7/g7/h7. White is ahead by 4 points of material. Black to move.

Solution (5 moves)

1. Opponent setup: Qb4 — queen d2→b4. Now Black to move.
2. Best move: Nxf2 — knight e4→f2, captures rook. Opponent replies Rxf2 (rook f4→f2, captures knight).
3. Best move: Bxg2 — bishop h3→g2, captures pawn. Opponent replies Rxg2 (rook f2→g2, captures bishop).
4. Best move: Qb1+ — queen g6→b1, gives check. Opponent replies Kf2 (king g1→f2).
5. Best move: Rxb2+ — rook a2→b2, captures bishop, gives check. Opponent replies Qxb2 (queen b4→b2, captures rook).
6. Best move: Qxb2+ — queen b1→b2, captures queen, gives check.

Tactical themes

advantage, fork, middlegame, pin, very long. The key move Rxb2+ captures with check, forcing a response.

Position data

FEN: 6k1/5ppp/6q1/1PPp4/3PnR2/4P2b/rB1Q1RPP/6K1 w - - 5 31

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