There is a black bishop at a4, black queen at b4, a black king at e5 and a white king at c1. There is a checkmate in 3 moves. I want to know what the moves are.
[FEN "8/8/8/4k3/bq6/8/8/2K5 b - - 0 1"]
Black mates in three with
[FEN "8/8/8/4k3/bq6/8/8/2K5 b - - 0 1"] 1... Qb7 2. Kd2 Qe4 3. Kc1 (3. Kc3 Qd4#) Qc2#
The paradoxical Qb7 is the only solution, you can check this with an endgame database.