One of the many variations of Russian Pool, "Scrub" is unusual as any player making a foul stroke loses his entire score.   The brown and pink balls have no scoring role in this game and must be avoided at all times. These are the "scrub" balls, and it is considered a foul if either is struck at any time by the cue-ball.

The game is best played by three or more players, and won by the first to reach either 31 or 61 points as decided before the game begins.   Points are scored by pots and cannons, but the four 'scoring' object-balls may only be potted in certain pockets - see Rule 6.

On the opening stroke the first player must play for the blue ball, and every player must make a cannon before they can legally add to their score by potting.

The game is played with the cue-ball and the six colours from the snooker set.

To begin the game the six colours are placed on their normal spots, except for the blue and the black, which are reversed.

The brown and pink are the "scrub" balls and must be avoided at all times. If the cue-ball contacts either ball, at any time in the stroke, it is a foul.

The opening stroke requires the first player in the game to play for and strike the blue ball first. If he fails it is a foul stroke, the game is not considered to have begun, and the stroke must be replayed.

No player may score by potting until he has first scored a cannon. To pot a ball before making a cannon, even by a fluke, is a foul.

The four scoring balls may only be potted in certain pockets.

Points are scored in the following manner:-

The winner is the first player to score exactly 31 or 61 points, as decided before the game begins.

If the agreed score is 31:-

scoring exactly 30, or more than 31, is a foul.

If the agreed score is 61:-

scoring exactly 60, or more than 61, is a foul.

For any foul stroke the offending player loses their entire score.

After making a foul, the player must again begin scoring with a cannon, as in Rule 5.