What we have here is a 'KRB vs krn' mate in 3 chess puzzle by a computer program, Chesthetica, using the Digital Synaptic Neural Substrate (DSNS) computational creativity approach. It doesn't use endgame tablebases, deep learning or any kind of traditional AI. You can learn about how these constructs are selected here.
White to Play and Mate in 3
Chesthetica v12.45 (Selangor, Malaysia)
Generated on 12 Dec 2021 at 7:46:30 PM
Even with the same version number, each copy of Chesthetica 'evolves' and may perform somewhat differently over time. White has a bishop for Black's knight. Try to solve this puzzle. Do try some of the others in the series as well before you go. Collectively, these puzzles are intended to cater to players of all levels.
Similar Chess Problems by Chesthetica: 00044, 00935