Computer-Generated Chess Problem 03442

Here is a new 'KQR vs krpp' mate in 4 chess problem generated by the program, Chesthetica, using the approach known as the DSNS from the sub-field of AI, computational creativity. 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.

8/8/8/8/7p/6R1/prQ5/k4K2 w - - 0 1
White to Play and Mate in 4
Chesthetica v12.38 (Selangor, Malaysia)
Generated on 31 Aug 2021 at 2:22:06 PMSolvability Estimate = Moderate
Humans have been composing original chess problems for over a thousand years. Now a computer can do it too. Okay, let me think for a minute if there's anything else to say here. Try to solve this as quickly as you can. If you like it, please share with your friends. Note that not all the chess problems are like this. They cover quite the spectrum of solving ability and there are thousands published already. If you're wondering how complex some chess problems can get, read this.
Solution