A free ball is a situation in the game of snooker or pool.

It occurs after a foul shot where the resultant layout of the table leaves the opponent snookered - unable to hit any legitimate ball on either side. The opponent of the player who committed the foul can choose any other ball on the table as a replacement for the ball in question, and pot this as of it were the intended ball. If this was a red, they then pot a colour before continuing the break.
This makes it possible to compile a break higher than the normal maximum of 147; in theory a break of 155 could be played (free ball +black gives 8 points, continuing with a perfect 147 series yields 155).
However, this has never been achieved in a professional tournament.

It is allowed to play a snooker using the free ball, providing the snooker is not behind the ball which has just been used as the ball ‘on’. It is allowed to cannon a ball nominated as a red into another red, so as to pot this (a plant)

References

• VBH Singles Fall 2007 Results for Week # 6 24-Oct-2007 sorted by Season Grand Total Points 'h' 1st Tie break - Season Head to 3 8 10 3 8 Adam * 4 11 14 3 9 DaveS 3 7 8 4 10 Andy 4 9 11 4 11 JasonH * 5 11
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