Which game is a chess variant, Ubongo or Ouk-Khmer?
Ouk-Khmer (Hill's version) Ouk-Khmer (also known as Cambodian Chess) is a chess variant which D. B. Pritchard claimed was played in Cambodia although its actual origins appear to be unknown. Pritchard gives the source as P. A. Hill. It combines elements of makruk and xiangqi. Similar to xiangqi, it is played on the intersections of an 8×8 monotone board (Instead of 8x9). Contrary to Pritchard's claim, the actual variety of chess played in Cambodia today, known as "Ok" or "Ouk Chatrang" is nearly identical to Makruk. The authenticity of the game described by Pritchard remains doubtful.
Shelem Shelem(Persian: شلم‎ ‎ "Shělěm"), also called Rok or similar, is an Iranian trick-taking card game with four players in two partnerships, bidding and competing against each other. It is similar to Spades and Hokm, but bidding and trump are declared in every hand by the bidding winner. Both the name and the point structure of this game are similar to the American game Rook, there being a possible connection between the two games, although it is not clear as from which game it derives.