A Superdraw is the term given to a Saturday Lotto draw with a much larger guaranteed jackpot pool than usual. Members of the Australian Lotto Bloc use part of their revenue from normal weekly draws to fund these special draws, which occur seven times a year. In the days of the "Second Draw", Superdraw pools - like regular first division pools - were split evenly between the two draws (usually $8 million each at the time), however now all the funds are pooled into the one draw, resulting in a higher headline figure.
In recent years Superdraws have seen guaranteed First Division prize pools of around $20 million. Since 1999, the last Superdraw of each year is often known as a "Megadraw" - its guaranteed First Division pool is larger still, with the 2005 draw's First Division pool amassing $32 million. The end-of-year Megadraw - which began as a "Millennium Megadraw" on 31 December 1999 - is conducted on or around New Year's Eve; First Division pools in these draws are generally $30 million or more.
Since the expansion of New South Wales' Monday and Wednesday Lotto interstate, Superdraws have also appeared on Monday Lotto, where a First Division pool of $5 million is offered. As a single-state game NSW Lotteries ran more occasional promotions, such as "Anniversary Weeks" based around the anniversary of NSW Lotto's beginnings in November 1979.
Read more about this topic: Lotteries In Australia