This happens when a player makes a foul shot before a ball is potted, leaving a free ball.

His opponent pots a free ball of his choice with a black and follows this with a further 15 reds and 15 blacks and all the colours to give him a total of 155.

It's never happened yet.

This occurs when a player lays on a snooker and his opponent plays a shot that the referee deems unworthy of a professional in attempting an escape.

This is when a player does not make his best attempt at getting out of the snooker because he does not want to leave his opponent an easy shot.

This is an unnatural contact which causes an unnatural reaction between the cue ball and the object ball.

It can affect the cue ball by taking the pace out of it or it can alter the object ball's direction.

We don't quite know what it's caused by. Static electricity has been blamed as has air conditioning at venues.

That was completed by Steve Davis against John Spencer in the 1982 Lada Classic.

That was the epic final frame of the 1985 World Championship final between Steve Davis and Dennis Taylor which lasted 69 minutes.

Taylor won on the final black.

Joe Davis at the expense of Tom Newman.

The final was held in Camkins Billiard Hall in Birmingham in 1927. Davis received a princely sum of six pounds and 10 shillings.

It was Stephen Hendry, who won the first of his seven titles in 1990. He replaced Alex Higgins as the youngest champion.

It all depends on the year. If you qualified for the Crucible in 2002 then you are guaranteed a cheque of �14,500.

This amount will continue to rise as the prize pot increases.

Joe Johnson was 150-1 with the bookmakers at the start of the 1986 tournament.