Computer-Generated Chess Problem 02696

Now, here we have a 'KQRRPP vs kqqr' mate in 4 chess puzzle or problem (whichever you wish to call it) composed by Chesthetica using the relatively new computational creativity approach called the 'DSNS'. Chesthetica is able to generate various types of mates and study-like constructs and also compose problems using specific combinations of pieces fed into it (such as using only a queen vs. rook and knight). Learn more about it on ChessBase.

2R5/1krq4/1P2Q3/8/1R6/2qP2K1/8/8 w - - 0 1
White to Play and Mate in 4
Chesthetica v11.20 (Selangor, Malaysia)
Generated on 2 Jul 2019 at 10:04:28 AMSolvability Estimate = Difficult
White actually has less material than Black. The white army is down by about 2 (Shannon) pawn units in value. Leave a comment below, if you like. Collectively, these puzzles are intended to cater to players of all levels.
Main Line of the Solution (Skip to 0:35)