Computer-Generated Chess Problem 03031

Take a look at this 'KQRB vs kqrrp' mate in 3 chess construct composed autonomously by Chesthetica using the relatively new computational creativity approach called the 'DSNS'. You can learn more about the DSNS here. The position below contains 9 pieces which means it simply could not have been derived even from an existing endgame tablebase which is presently limited to 7 pieces.

5K2/4Q3/2R3rk/7p/1B5q/8/8/4r3 w - - 0 1
White to Play and Mate in 3
Chesthetica v11.86 (Selangor, Malaysia)
Generated on 23 Aug 2020 at 11:19:52 AMSolvability Estimate = Difficult
Some of the earliest chess problems by humans are over 10 centuries old but original ones by computer are very recent. White actually has less material than Black. The white army is down by about 3 (Shannon) pawn units in value. 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: 00151, 02723.
Solution