Wehrschach is the first and only implementation of the rare and mostly unknown chess variant "Wehrschach" that was developed in 1938 and promoted by the German military during the Second World War. The game uses a 11x11 squares board and five distinct unit types with different movement and conquering rules. It supports local and asynchronous online multiplayer as well as matchmaking through Google Play and matches against an AI. Source: The Developer Website.