Computer-Generated Chess Problem 02548

A new if not unique KRNNPP vs krn mate in 4 chess problem generated 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. Any chess position with this many pieces could not possibly have been obtained from known endgame databases. Chesthetica is therefore the real McCoy.

4K2R/8/6kN/8/2n1N1PP/8/8/7r w - - 0 1
White to Play and Mate in 4
Chesthetica v11.05 (Selangor, Malaysia)
Generated on 11 Mar 2019 at 2:03:06 AMSolvability Estimate = Difficult
The chess problems are published chronologically based on the composition date and time. However, later compositions may have an earlier version of Chesthetica listed because more than one computer (not all running the same version of the program) is used. White is significantly ahead in material. Why not time yourself how long it took you to solve this? Collectively, these puzzles are intended to cater to players of all levels.
Main Line of the Solution (Skip to 0:35)