Chess Puzzle #RBk3b — Advanced, Black to move, middlegame

Position

White: king g2; queen c4; rook b1; bishop e3; knight d2; pawns b3/d5/f2/g3. Black: king g8; queen a2; rooks b8/e8; pawns a3/c7/f7/g7/h7. Material is balanced. Black to move.

Solution (3 moves)

1. Opponent setup: Qxc7 — queen c4→c7, captures pawn. Now Black to move.
2. Best move: Qxb1 — queen a2→b1, captures rook. Opponent replies Nxb1 (knight d2→b1, captures queen).
3. Best move: a2 — pawn a3→a2. Opponent replies Qc2 (queen c7→c2).
4. Best move: a1=Q — pawn a2→a1, promotes to queen.

Tactical themes

advanced pawn, advantage, long, middlegame, promotion, sacrifice. The key move Qxb1 wins material.

Position data

FEN: 1r2r1k1/2p2ppp/8/3P4/2Q5/pP2B1P1/q2N1PK1/1R6 w - - 0 25

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