Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
558 |
2081 | (76) | 9 |
| 1902 |
582 |
2080 | (79) | 0 |
| 1903 |
585 |
2079 | (80) | 0 |
| 1904 |
607 |
2079 | (80) | 0 |
| 1905 |
621 |
2078 | (78) | 0 |
| 1906 |
628 |
2077 | (74) | 0 |
| 1907 |
638 |
2076 | (67) | 0 |
| 1908 |
664 |
2075 | (58) | 14 |
| 1909 |
644 |
2100 | (58) | 0 |
| 1910 |
577 |
2125 | (54) | 0 |
| 1911 |
560 |
2150 | (42) | 30 |
| 1912 |
610 |
2123 | (48) | 0 |
| 1913 |
675 |
2097 | (45) | 29 |
| 1914 |
705 |
2075 | (56) | 0 |
| 1915 |
707 |
2054 | (62) | 6 |
| 1916 |
714 |
2044 | (71) | 0 |
| 1917 |
735 |
2034 | (77) | 0 |
| 1918 |
765 |
2024 | (81) | 0 |
| 1919 |
789 |
2014 | (84) | 0 |
| 1920 |
899 |
2004 | (85) | 6 |
| 1921 |
953 |
2010 | (92) | 0 |
| 1922 |
977 |
2016 | (97) | 0 |
| 1923 |
1060 |
2022 | (102) | 0 |
| 1924 |
1072 |
2028 | (106) | 0 |
| 1925 |
1108 |
2034 | (109) | 0 |
| 1926 |
1147 |
2040 | (112) | 0 |
| 1927 |
1178 |
2046 | (114) | 0 |
| 1928 |
1174 |
2052 | (116) | 0 |
| 1929 |
1164 |
2058 | (117) | 0 |
| 1930 |
1182 |
2064 | (118) | 0 |
| 1931 |
1226 |
2070 | (118) | 0 |
| 1932 |
1226 |
2076 | (119) | 0 |
| 1933 |
1230 |
2082 | (118) | 0 |
| 1934 |
1238 |
2088 | (118) | 0 |
| 1935 |
1245 |
2094 | (117) | 0 |
| 1936 |
1193 |
2100 | (116) | 0 |
| 1937 |
1115 |
2106 | (114) | 0 |
| 1938 |
1086 |
2112 | (112) | 0 |
| 1939 |
995 |
2118 | (109) | 0 |
| 1940 |
864 |
2124 | (106) | 0 |
| 1941 |
796 |
2130 | (102) | 0 |
| 1942 |
711 |
2136 | (98) | 0 |
| 1943 |
654 |
2142 | (92) | 0 |
| 1944 |
625 |
2148 | (86) | 0 |
| 1945 |
635 |
2154 | (78) | 0 |
| 1946 |
605 |
2160 | (68) | 0 |
| 1947 |
475 |
2166 | (55) | 30 |
Rating table notes
|
| Biographical data |
| Name: Isakov, Konstantin Ivanovich |
| Born: |
| Died: |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1901-1920, page 307 |
| Di Felice, Chess Results, 1947-1950, page 462 |
| Gaige, Chess Personalia, page 187 |
| Skinner and Verhoeven, Alexander Alekhine's Chess Games, page 17, 19 |
| Thulin, Name index to CTC, page 118 |
| |
