THE LONG LONG REIGNS
IN CHESS
(#1)
(Chessmetrics.com+FIDE)

1 Kasparov 266 months ( September 1982 - October 2004 ) : 22 y and 2 m
2 Lasker 162 ( June 1890 - December 1902 ) : 13 y and 6 m
3 Karpov 104 ( August 1974 - August 1982 ) : 8 y and 8 m
4 Fischer 102 ( September 1966 - July 1974 ) : 8 y and 6 m
5 Steinitz 89 ( September 1870 - July 1877 ) : 7 y and 5 m
6 Steinitz 86 ( October 1883 - May 1890 ) : 7 y and 2 m
7 Alekhine 85 ( May 1929 - December 1935 ) : 7 y and 1 m
8 Staunton 75 ( May 1843 - August 1849 ) : 6 y and 3 m
9 Botvinnik 75 ( August 1944 - May 1950 ) : 6 y and 3 m
10 Carlsen 61 (July 2011-July 2016) : 5 y and 1 m
11 Capablanca 56 ( April 1919 - December 1923 ) : 4 y and 8 m
12 Zukertort 55 ( August 1878 - November 1882 ) : 4 y and 7 m
13 Lasker 50 ( September 1908 - July 1912 ) : 4 y and 2 m