Computer-Generated Chess Problem 03352

Contemplate this 'KRRBB vs krp' mate in 3 chess puzzle or problem (whichever you wish to call it) composed 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. 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 8 pieces could have been taken from such a database.

4Br2/4RRB1/3k4/1p6/4K3/8/8/8 w - - 0 1
White to Play and Mate in 3
Chesthetica v12.30 (Selangor, Malaysia)
Generated on 12 Jun 2021 at 1:13:56 AMSolvability Estimate = Difficult
White has a decisive material advantage in this position but the winning sequence may not be immediately clear. Leave a comment below, if you like. 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