Contemplate this 'KQRBNN vs knn' four-move chess problem generated by Chesthetica using the relatively new computational creativity approach called the 'DSNS'. Chesthetica is capable of composing positions that may otherwise take centuries or longer to arise in an actual game; so you can enjoy them right now instead. You can learn more about the DSNS here. Any chess position over 7 pieces could not possibly have been derived from an endgame tablebase which today is limited to 7 pieces.
White to Play and Mate in 4
Chesthetica v11.62 (Selangor, Malaysia)
Generated on 28 Feb 2020 at 10:47:47 PM
Okay, let me think for a minute if there's anything else to say here. Do you think you could have composed something better with these pieces? Share in the comments and let us know how long it took you. Feel free to copy the position into a chess engine and discover even more variations of the solution.