 The game is played with sixteen balls (a and fifteen usually unnumbered ) on a small (6 ft × 3 ft or 7 ft × 3 ft 6 in) pool table with six .Blackball is a standardized version of the English version of eight-ball.The two main sets of playing rules are those of the World Pool-Billiard Association (WPA), known as "blackball rules", and the older code of the World Eightball Pool Federation (WEPF), often referred to as "world rules".