[1][2][3] The game involves a somewhat more significant amount of luck than either nine-ball or eight-ball, because of the disproportionate value of pocketing balls on the break shot and increased difficulty of doing so.[3] As in other games, the player at turn may demand a re-rack if not satisfied with the correct formation or position of the racked balls.The cue ball is placed anywhere behind the head string ("in the kitchen")[3] and a hard break is typically performed.[1][2][3] A shot in which the player pocketed one or more object balls but also fouled still incurs a penalty.Kisses, caroms, kicks, banks, combinations and non-scoop-under jump shots are legal.This form of practice is often used as a drill to hone position play with the final balls of a rack in eight-ball and nine-ball.
A three-ball straight rack, using the side of the nine-ball diamond rack to align the balls with the head and foot spots.
Using the 8, 9 and 6 balls for practice, in a special three-ball rack. (Side view.)