Computer-Generated Chess Problem 03520

Here is a 'KRRBB vs krrnpp' chess problem generated by the program, Chesthetica, using the 'Digital Synaptic Neural Substrate' computational creativity approach which does not use any kind of deep learning. There is no known limit to the quantity or type of compositions that can be generated. The largest endgame tablebase in existence today is for 7 pieces (Lomonosov) which contains over 500 trillion positions, most of which have not been seen by human eyes. This problem with 11 pieces goes even beyond that and was therefore composed without any such help.

r4B2/3R4/kpK5/4R2n/8/3p4/4B2r/8 w - - 0 1
White to Play and Mate in 4
Chesthetica v12.43 (Selangor, Malaysia)
Generated on 17 Nov 2021 at 10:01:38 AMSolvability Estimate = Difficult
Some of the earliest chess problems by humans are over 10 centuries old but original ones by computer are very recent. White has two bishops for Black's two pawns and knight. If this one is too easy or too difficult for you, try out some of the others. Take some time to study the analysis and you might appreciate the puzzle a little more.
Solution