Chess Puzzle #XWaP8 — Expert, Black to move, middlegame

Position

White: king g1; queen b4; rooks b1/f2; knight h4; pawns e4/g2/h2. Black: king h7; queen e3; rooks b8/f8; pawns a4/f7/g6/h6. White is ahead by 2 points of material. Black to move.

Solution (2 moves)

1. Opponent setup: Qe1 — queen b4→e1. Now Black to move.
2. Best move: Rxb1 — rook b8→b1, captures rook. Opponent replies Qxb1 (queen e1→b1, captures rook).
3. Best move: Rc8 — rook f8→c8.

Why this works

Black's rooks control the b-file, and White's queen on e1 (after setup) is pinned to the back rank — it cannot leave the first rank without allowing Qxg1#. After 1...Rxb1, White must recapture with 2.Qxb1 (the king cannot interpose). Black then delivers 2...Rc8, attacking the pinned queen on b1 with a rook that cannot be defended. The queen has no escape: moving away loses the queen to the rook; staying on the first rank exposes g1 to Qxg1#. White's position collapses because the queen is trapped between the pin and the back-rank mate threat. Black nets the exchange (rook for rook, then wins the queen for nothing) with a forced sequence.

What to practice

Recognize when your opponent's queen or rook is pinned to the back rank by your queen and a rook on an open file. The pinned piece cannot leave without allowing mate, which removes its defensive value and makes it vulnerable to a second attacker. This pattern reaches its sharpest form in positions where the defending king has no escape squares (g1 here is the only square, blocked by White's own pawns). Train yourself to spot the pin first, then hunt for a forcing sequence that capitalizes on the immobilized defender.

Tactical themes

crushing, defensive move, middlegame, pin, short. The key move Rxb1 wins material.

Position data

FEN: 1r3r2/5p1k/6pp/8/pQ2P2N/4q3/5RPP/1R4K1 w - - 4 30

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