Queen mate on b2
Objective: White to move. Find checkmate in one move.
Position and task condition
The black king on a2 is boxed in by its own pieces and the edge of the board. Check every square from which the white queen can give check.
FEN
RQbrbBQB/2pr3B/7R/7R/1b2K2N/rq3R1B/kp5Q/rn1bBNBb w - - 0 1Theme: Mate in one