Computer-Generated Chess Problem 03201

This is an original 'KQRBN vs kqrn' four-move chess puzzle or problem (whichever you wish to call it) composed by a computer using the DSNS computational creativity approach which doesn't use any kind of traditional AI. Chesthetica has the creative ability to compose positions that may otherwise take centuries to arise in an actual game, if ever. 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. The largest (Lomonosov) tablebase today is for 7 pieces which contains over 500 trillion positions. With each additional piece, the number of possible positions increases exponentially. It is therefore impossible that this problem with 9 pieces could have been taken from such a database.

8/1Q6/q7/2n5/8/3N4/3B2R1/r2k2K1 w - - 0 1
White to Play and Mate in 4
Chesthetica v12.19 (Selangor, Malaysia)
Generated on 7 Feb 2021 at 5:52:03 PMSolvability Estimate = Difficult
White is significantly ahead in material. Do share and try out some of the others too. Solving chess puzzles like this is probably good for your health as it keeps your brain active. Nobody wants something like early-onset Alzheimer's.
Solution