Computer-Generated Chess Problem 03506

Here is a 'KQRBN vs kqnpp' mate in 4 chess puzzle or problem (whichever you wish to call it) composed by Chesthetica 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. There is also no proven limit to the quantity or type of legal compositions that can be automatically generated. 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 10 pieces could have been taken from such a database.

1N3k1n/2K3R1/Qp6/8/8/2p1B3/8/q7 w - - 0 1
White to Play and Mate in 4
Chesthetica v12.43 (Selangor, Malaysia)
Generated on 4 Nov 2021 at 9:56:40 PMSolvability Estimate = Difficult
Humans have been composing original chess problems for over a thousand years. Now a computer can do it too. White is over a rook's worth in material but the precise win in this position still needs to be found. If this one is too easy or too difficult for you, try out some of the others. Solving chess puzzles like this can be good for your health as it keeps your brain active. It may even delay or prevent dementia.
Solution