Which game is a chess variant, Ubongo or Ouk-Khmer?
Ubongo: Ubongo is a board game developed by Polish-born Swedish game designer Grzegorz Rejchtman. 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.
Ouk-Khmer