Pyramid 

Russian pyramid, also known as Russian billiards (Russian: ру́сский билья́рд, russky bilyard, French: billard russe) is a form of pocket billiards played on a modified snooker table with narrower pockets. It is popular across Eastern Europe as well as countries of the former Soviet Union/Eastern Bloc. A variant with colored balls modeled on those of pool is known as Russian pool. In Western countries, the game is known as pyramid billiards, or simply pyramid within professional circles.