Computer-Generated Chess Problem 02940

A new if not unique KRRBB vs krnp chess puzzle created by the program, Chesthetica, using the 'DSNS' computational creativity approach which does not use any kind of machine or deep learning. Chesthetica is able to generate a variety of compositions using any combination of pieces. Read more about it here. 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 9 pieces goes even beyond that and was therefore composed without any such help.

7K/4R3/8/2k1r3/4BB2/8/2p3n1/1R6 w - - 0 1
White to Play and Mate in 4
Chesthetica v11.70 (Selangor, Malaysia)
Generated on 2 Jun 2020 at 8:59:19 AMSolvability Estimate = Moderate
Even with the same version number, each copy of Chesthetica 'evolves' and performs somewhat differently over time. Okay, let me think for a minute if there's anything else to say here. Leave a comment below, if you like. 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