New candidate for world's scariest abstract board game

Rhythmomachy was created 1000 years ago and translated to English in the 16th century. Before the Rennaissance, its popularity allegedly rivaled that of chess. It’s chess-like, or shogi-like maybe, but has more ways of winning, way too many numbers, and is generally a prime example of the historical heights of geekery. Also check out this contemporary take from an AI project at Carnegie-Mellon (PDF), the game’s original English text, and this .