Khalifman gained the Grandmaster title in 1990 with one particularly good early result being his first place in the 1990 New York City Open ahead of a host of strong players. His most notable achievement was winning the FIDE World Championship in 1999, a title he held until the following year. He was rated 44th in the world at the time, while "Classical" World Champion Garry Kasparov was rated No. 1. Khalifman said after the tournament, "Rating systems work perfectly for players who play only in round robin closed events. I think most of them are overrated. Organizers invite same people over and over because they have the same rating and their rating stays high." Khalifman played in the Linares chess tournament next year, and performed credibly (though placing below joint winner Kasparov).