4.5 years, though he is considered to have already become the number one player in the world before the official list started, as he topped the unofficial list in 1970. Karpov topped the list 12 times, successively 11 times over a period of 8 years, and once for 6 months. Kasparov has been world number one on the official list 54 times over a period of 22 years, and 31 times successively over nearly a decade from July 1996 to January 2006; he was number one 3 times successively over 1.5 years, then 20 times successively over 10 years, then finally 31 times over 9 years and 9 months. Kramnik was world number one 2 times (for 6 and 3 months), for a total of 9 months. Topalov has been world number one successively 4 and 6 times (a total of 10 times), for 12 months and 15 months respectively (for a total of 27 months). Anand has been world number one successively 2 and 3 times (a total of 5 times), for 6 months and 9 months respectively (for a total of 15 months). Carlsen has been world number one a record 119 times, including a record 107 consecutive times from July 2011 until May 2020. Women List of world female number ones The following is a list of the players ranked number one female on the FIDE rating system from the first official list in July 1971 to the present day, along with their ratings during the periods in question. Timeline Women statistics List of junior world number ones FIDE publishes lists of highest-rated junior chess players; a "junior" is defined as being a player who is aged under 20 at the start of the year. The following is a list of the players ranked number one junior in the FIDE rating system from July 1999 to the present day, along with their ratings during the periods in question. List of girl world number ones FIDE publishes lists of highest-rated girl chess players; a "girl" is defined as being a player who is aged under 20 at the start of the year, and female. The following is a list of the players ranked number one girl in the FIDE rating system from January 2000 to the present day, along with their ratings during the periods in question. Rapid and blitz ratings Since January 2012, FIDE has also calculated