Computer-Generated Chess Problem 02751

A 'KRRB vs kpp' mate in 4 chess construct composed autonomously by a computer program, Chesthetica, using the Digital Synaptic Neural Substrate (DSNS) computational creativity approach. It doesn't use endgame tablebases, deep learning or any kind of traditional AI. You can learn more about the DSNS here.

8/8/7B/4pp2/5RR1/4K2k/8/8 w - - 0 1
White to Play and Mate in 4
Chesthetica v11.32 (Selangor, Malaysia)
Generated on 16 Sep 2019 at 5:11:07 AMSolvability Estimate = Moderate
Chess puzzles are ancient. Some are over a thousand years old but only in the 21st century have computers been able to compose original ones on their own like humans can. What was the machine 'thinking' when it came up with this? Leave a comment below, if you like. Feel free to copy the position into a chess engine and discover even more variations of the solution.
A Similar Chess Problem by Chesthetica: 01258
Solution