Russian pyramid

Not to be confused with the historical pocket billiards game pyramid pool, a similar but unrelated game, or slosh or bar billiards, both also called "Russian billiards".
Russian pyramid game setup, with the object balls in a triangle rack at the foot of the table, and the cue ball in front of (up-table of) the head string (baulk line).

Russian pyramid, also known as Russian billiards (Russian: ру́сский билья́рд, russky bilyard), is a form of billiards played on a large billiard table with narrow pockets. It is played across Russia and several former Soviet/Eastern Bloc countries. In the West, the game is known as pyramid billiards, or simply pyramid.