While there are still some on the table, a red ball has to be potted before one of the other coloured balls can be potted. Players must alternate the potting of a red and another colour. Once the reds are all potted the remaining colours must be potted in the following order: Yellow, Green, Brown, Blue, Pink and Black.
One answer could be a rocket scientist, another an artillery gunner, another a snooker player, another a football player, another a physicist, another an engineer.
Mark Allen - snooker player - was born on 1986-02-22.
Sidney Smith - snooker player - was born in 1908.
Gary Owen - snooker player - was born in 1929.
Philip Williams - snooker player - was born in 1968.
Sidney Smith - snooker player - died in 1990.
John Dunning - snooker player - was born in 1927-04.
John Spencer - snooker player - was born on 1935-09-18.
Anthony McGill - snooker player - was born on 1991-02-05.
Tony Jones - snooker player - was born on 1960-04-15.
Andy Lee - snooker player - was born on 1980-11-27.
Daniel Wells - snooker player - was born on 1988-07-31.