Consider this 'KQBN vs kn' mate in 4 chess problem generated autonomously by the program, Chesthetica, using the relatively new computational creativity approach called the 'DSNS'.
Chesthetica v10.56 : Selangor, Malaysia
White to Play and Mate in 4 : 2017.10.22 1:08:43 PM
Okay, let's see.... The default solving time of 30 seconds may be too short for you if the problem is difficult so feel free to hit the pause button and solve at your own pace. Do share and try out some of the others too. As a whole, these problems are intended to cater to players of all skill levels.
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