Chess Puzzle #25reh — Beginner, Black to move, middlegame

Position

White: king b1; queen h4; rooks d4/e1; knight f3; pawns a2/b2/g2/h2. Black: king g8; queen a4; rooks c2/e8; knight c3; pawns a7/b7/d5/e6/g7/h7. Black is ahead by 2 points of material. Black to move.

Solution (1 move)

1. Opponent setup: bxc3 — pawn b2→c3, captures knight. Now Black to move.
2. Best move: Qxa2# — queen a4→a2, captures pawn, delivers checkmate.

Why this works

After White's 25.cxc3, Black's queen on a4 delivers mate with 1...Qxa2#. The white king on b1 is trapped with no escape squares: a1 is controlled by the queen on a2, c1 is also controlled by the queen, and b2 is blocked by White's own pawn. Crucially, no White piece can interpose or capture the queen—the rook on d4 cannot reach a2, the queen on h4 is too far away, and the rook on e1 has no path to the second rank. The removal of the knight from c3 (via the setup capture 25.cxc3) eliminated Black's own piece but also removed the only defender that could have challenged the queen's advance down the a-file.

What to practice

Recognize when a capture actually weakens your opponent's king position by removing a defender or clearing a crucial line. Here, White's pawn capture on c3 looks natural—it removes a knight—but it opened the a-file and left the king with no defender on the second rank. Always scan for back-rank and near-rank mating patterns after forcing moves like pawn captures near the king.

Tactical themes

mate, mate in 1, middlegame, one move, queenside attack. The combination ends with Qxa2# delivering checkmate.

Position data

FEN: 4r1k1/pp4pp/4p3/3p4/q2R3Q/2n2N2/PPr3PP/1K2R3 w - - 2 25

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