Polgár returned to chess at the prestigious Corus chess tournament on 15 January 2005. The tournament, which was now considered by some as the most important in Europe, was won by fellow Hungarian Péter Lékó while Polgár scored 7/13 to tie for fourth with Alexander Grischuk, Michael Adams and Kramnik. She was therefore relisted in the April 2005 FIDE rating list, gaining a few rating points for her better-than-par performance at Corus. In May she also had a better-than-par performance at a strong tournament in Sofia, Bulgaria, finishing third. This brought her to her highest ever rating, 2735, in the July 2005 FIDE list and enabled her to retain her spot as the eighth ranked player in the world.