Computer-Generated Chess Problem 03188

Here is a new 'KQBNP vs knpp' mate in 4 chess problem generated by the program, Chesthetica, using the approach known as the DSNS from the sub-field of AI, computational creativity. Depending on the type and complexity of the problem desired, a single instance of Chesthetica running on a desktop computer can probably generate anywhere between one and ten problems per hour. Any chess position over 7 pieces could not possibly have been derived from an endgame tablebase which today is limited to 7 pieces.

8/4pk2/4n3/1B3P2/4N3/7Q/1K1p4/8 w - - 0 1
White to Play and Mate in 4
Chesthetica v12.19 (Selangor, Malaysia)
Generated on 25 Jan 2021 at 4:24:50 PMSolvability Estimate = Difficult
Now, let's see what else there is to say. Give me a moment. Try to solve this as quickly as you can. If you like it, please share with your friends. Note that not all the chess problems are like this. They cover quite the spectrum of solving ability and there are thousands published already. Anyway, if standard chess isn't your thing, you might instead like SSCC.
Solution