Take a look at this 'KRBNN vs kppp' mate in 4 chess puzzle or problem (whichever you wish to call it) composed by Chesthetica using the relatively new computational creativity approach called the 'DSNS'. You can learn more about the DSNS here. The largest endgame tablebase in existence today is for 7 pieces (Lomonosov) which contains over 500 trillion positions, most of which have not and never will be seen by human eyes. This problem with 9 pieces goes even beyond that and was therefore composed without any such help whatsoever.
White to Play and Mate in 4
Chesthetica v11.02 (Selangor, Malaysia)
Generated on 17 Mar 2019 at 7:20:59 AM
A seemingly earlier version of Chesthetica on a problem composed later (based on the date and time stamp) simply means that version may have been running on a different computer or operating system user account. White has a decisive material advantage in this position but the winning sequence may not be immediately clear. 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.
Main Line of the Solution (Skip to 0:35)
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