The Nedbank Golf Challenge, previously known as the Million Dollar Challenge, is an annual men's professional golf tournament played at the Gary Player Country Club in Sun City, North West province, South Africa. It was first played in 1981 and takes place towards the end of the year, in November or December.
For many years the tournament was a small-field invitational stroke play event with typically 12 players competing. Since it became a European Tour event in 2013, the field size has increased, to 30 from 2013 to 2015 and to 72 in 2016. Originally it was not an official event for any of the major tours.
From 2010 to 2012, a separate tournament for senior golfers was held concurrently. Wikipedia