Computer-Generated Chess Problem 03314

This is an original 'KQRPP vs kqbp' four-move chess problem generated autonomously by a computer using the Digital Synaptic Neural Substrate (DSNS) computational creativity approach. The DSNS does not use endgame tablebases, neural networks or any kind of machine learning found in traditional artificial intelligence (AI). It also has nothing to do with deep learning. 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 9 pieces could have been taken from such a database.

8/1QK2R2/7b/3pk3/8/4PP2/3q4/8 w - - 0 1
White to Play and Mate in 4
Chesthetica v12.30 (Selangor, Malaysia)
Generated on 8 May 2021 at 9:25:21 PMSolvability Estimate = Difficult
If you notice an earlier version of Chesthetica listed with a newer problem, that simply means an earlier version may have been running on a different computer or OS user account. What was the machine 'thinking' when it came up with this? 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.
A Similar Chess Problem by Chesthetica: 00669
Solution