Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
562 |
2081 | (76) | 9 |
| 1902 |
587 |
2081 | (79) | 0 |
| 1903 |
601 |
2080 | (80) | 0 |
| 1904 |
616 |
2079 | (80) | 0 |
| 1905 |
633 |
2079 | (78) | 0 |
| 1906 |
635 |
2078 | (74) | 0 |
| 1907 |
647 |
2077 | (67) | 0 |
| 1908 |
674 |
2077 | (58) | 14 |
| 1909 |
645 |
2102 | (58) | 0 |
| 1910 |
575 |
2127 | (53) | 0 |
| 1911 |
563 |
2153 | (42) | 30 |
| 1912 |
609 |
2126 | (48) | 0 |
| 1913 |
680 |
2099 | (45) | 29 |
| 1914 |
711 |
2078 | (56) | 0 |
| 1915 |
709 |
2057 | (62) | 6 |
| 1916 |
725 |
2047 | (70) | 0 |
| 1917 |
734 |
2038 | (77) | 0 |
| 1918 |
762 |
2028 | (81) | 0 |
| 1919 |
785 |
2019 | (83) | 0 |
| 1920 |
894 |
2009 | (85) | 6 |
| 1921 |
942 |
2016 | (91) | 0 |
| 1922 |
973 |
2022 | (97) | 0 |
| 1923 |
1052 |
2029 | (102) | 0 |
| 1924 |
1067 |
2036 | (105) | 0 |
| 1925 |
1088 |
2043 | (109) | 0 |
| 1926 |
1126 |
2050 | (111) | 0 |
| 1927 |
1165 |
2056 | (114) | 0 |
| 1928 |
1158 |
2063 | (115) | 0 |
| 1929 |
1145 |
2070 | (117) | 0 |
| 1930 |
1137 |
2077 | (118) | 0 |
| 1931 |
1200 |
2083 | (118) | 0 |
| 1932 |
1197 |
2090 | (118) | 0 |
| 1933 |
1177 |
2097 | (118) | 0 |
| 1934 |
1184 |
2104 | (118) | 0 |
| 1935 |
1195 |
2110 | (117) | 0 |
| 1936 |
1132 |
2117 | (115) | 0 |
| 1937 |
1054 |
2124 | (114) | 0 |
| 1938 |
1033 |
2131 | (111) | 0 |
| 1939 |
941 |
2137 | (109) | 0 |
| 1940 |
817 |
2144 | (105) | 0 |
| 1941 |
757 |
2151 | (101) | 0 |
| 1942 |
674 |
2158 | (97) | 0 |
| 1943 |
625 |
2165 | (91) | 0 |
| 1944 |
595 |
2171 | (84) | 0 |
| 1945 |
599 |
2178 | (76) | 0 |
| 1946 |
575 |
2185 | (66) | 0 |
| 1947 |
509 |
2192 | (52) | 31 |
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 |
| |
