Harvard University mathematician becomes first to solve one of the most difficult chess puzzles. The so-called eight hetman problem remained an unsolved chess puzzle for 152 years. A Harvard University mathematician is the first person in the world to have managed to figure it out.

https://medium.com/@darkenergyarticles/harvard-university-mathematician-becomes-first-to-solve-one-of-the-most-difficult-chess-puzzles-7e8e7d82ae70