Computer-Generated Chess Problem 03903

Contemplate this 'KRRPPP vs krnpppp' mate in four chess puzzle by a computer using the DSNS computational creativity method. It does not use endgame tablebases, artificial neural networks, machine learning or any kind of typical AI. The chess board is a virtually limitless canvas for the expression of creative ideas (even by computer). Depending on the type and complexity of the problem desired, a single instance of Chesthetica running on a desktop computer can probably generate anywhere between one and ten problems per hour.

k4n2/6R1/1KP1p3/p7/5p1P/2P5/6pr/4R3 w - - 0 1
White to Play and Mate in 4
Chesthetica v12.63 (Selangor, Malaysia)
Generated on 25 Oct 2022 at 3:35:59 PMSolvability Estimate = Difficult
Humans have been composing original chess problems for over a thousand years. Now a computer can do it too. White has a slight material advantage over Black. Try to solve this as quickly as you can. If you like it, please share with others. As a whole, these problems are intended to cater to players of all skill levels.
Solution