When was the Northern Irish professional snooker player on which "The Rack Pack" focused on his rivalry born? 
The Rack Pack: The Rack Pack is a 2016 British comedy-drama television film about professional snooker during the 1970s through the 1980s, focusing on the intense rivalry between Alex Higgins and Steve Davis. Alex Higgins: Alexander Gordon "Alex" Higgins (18 March 1949 – 24 July 2010) was a Northern Irish professional snooker player, who is remembered as one of the most iconic figures in the game.
18 March 1949