around those of orthodox chess. In 1993, he founded the Circular Chess Society, which held its first world championship in 1996.

Historical circular chess

Rules

thumbOne set of rules for medieval circular chess is from the Persian author Muhammad ibn Mahmud Amuli's 'Treasury of the Sciences' (1325).

In this version, called shatranj al-muddawara (circular chess) or shatranj ar-Rumiya (Roman or Byzantine chess), the game