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

Position

White: king b1; queen d5; rook e5; pawns a2/b3/c2/d3/g3/h2. Black: king a8; queen b4; rook f1; pawns a4/b7/d4/g7/h7. White is ahead by 1 point of material. Black to move.

Solution (1 move)

1. Opponent setup: Kb2 — king b1→b2. Now Black to move.
2. Best move: a3# — pawn a4→a3, delivers checkmate.

Tactical themes

endgame, mate, mate in 1, one move. The combination ends with a3# delivering checkmate.

Position data

FEN: k7/1p4pp/8/3QR3/pq1p4/1P1P2P1/P1P4P/1K3r2 w - - 2 34

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