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. It originally appeared as "Pyramidens Portar" by the Swedish publisher Kärnan and won the Swedish "Årets spel" prize in 2003. The game was later released in Germany in 2005 as "Ubongo" by the publisher Kosmos and got 4th place at the German board game competition and was among the finalists in the International Gamers Award.
Irregular chess opening In chess, irregular opening is a traditional term for any opening considered unusual or unorthodox. In the early 19th century it was used for any opening not beginning with 1.e4 e5 (the Open Game) or 1.d4 d5 (the Closed Game). As opening theory has developed and openings formerly considered "irregular" have become standard, the term has been used less frequently.