Computer-Generated Chess Problem 03754

Now, here we have a 'KQRN vs kqrbn' mate in four chess construct composed autonomously by a computer 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. The largest complete endgame tablebase in existence today is for seven pieces (Lomonosov) which contains over 500 trillion positions, most of which have not and never will be seen by human eyes. This problem with nine pieces goes even beyond that.

8/5RQ1/8/q2b4/1n6/4N1K1/8/2r3k1 w - - 0 1
White to Play and Mate in 4
Chesthetica v12.56 (Selangor, Malaysia)
Generated on 6 Jul 2022 at 10:31:53 AMSolvability Estimate = Difficult
Humans have been composing original chess problems for over a thousand years. Now a computer can do it too. Black is ahead by a bishop. Why not time yourself how long it took you to solve this? Collectively, these puzzles are intended to cater to players of all levels. If you're wondering how complex some chess problems can get, read this.
Solution