Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
561 |
2086 | (76) | 9 |
| 1902 |
586 |
2085 | (79) | 0 |
| 1903 |
593 |
2085 | (80) | 0 |
| 1904 |
613 |
2084 | (80) | 0 |
| 1905 |
633 |
2083 | (78) | 0 |
| 1906 |
634 |
2082 | (74) | 0 |
| 1907 |
643 |
2081 | (67) | 0 |
| 1908 |
673 |
2081 | (58) | 14 |
| 1909 |
644 |
2106 | (58) | 0 |
| 1910 |
577 |
2131 | (53) | 0 |
| 1911 |
561 |
2156 | (42) | 30 |
| 1912 |
612 |
2129 | (48) | 0 |
| 1913 |
679 |
2103 | (45) | 29 |
| 1914 |
709 |
2082 | (56) | 0 |
| 1915 |
707 |
2061 | (62) | 6 |
| 1916 |
716 |
2051 | (70) | 0 |
| 1917 |
729 |
2042 | (77) | 0 |
| 1918 |
759 |
2032 | (81) | 0 |
| 1919 |
783 |
2022 | (84) | 0 |
| 1920 |
888 |
2013 | (85) | 6 |
| 1921 |
942 |
2020 | (91) | 0 |
| 1922 |
972 |
2027 | (97) | 0 |
| 1923 |
1053 |
2033 | (102) | 0 |
| 1924 |
1063 |
2040 | (105) | 0 |
| 1925 |
1084 |
2047 | (109) | 0 |
| 1926 |
1124 |
2054 | (111) | 0 |
| 1927 |
1160 |
2061 | (114) | 0 |
| 1928 |
1152 |
2067 | (115) | 0 |
| 1929 |
1141 |
2074 | (117) | 0 |
| 1930 |
1135 |
2081 | (118) | 0 |
| 1931 |
1196 |
2088 | (118) | 0 |
| 1932 |
1195 |
2095 | (118) | 0 |
| 1933 |
1177 |
2101 | (118) | 0 |
| 1934 |
1182 |
2108 | (118) | 0 |
| 1935 |
1188 |
2115 | (117) | 0 |
| 1936 |
1129 |
2122 | (115) | 0 |
| 1937 |
1051 |
2129 | (114) | 0 |
| 1938 |
1028 |
2136 | (111) | 0 |
| 1939 |
939 |
2142 | (109) | 0 |
| 1940 |
808 |
2149 | (105) | 0 |
| 1941 |
746 |
2156 | (101) | 0 |
| 1942 |
673 |
2163 | (97) | 0 |
| 1943 |
626 |
2170 | (91) | 0 |
| 1944 |
593 |
2176 | (84) | 0 |
| 1945 |
600 |
2183 | (76) | 0 |
| 1946 |
574 |
2190 | (66) | 0 |
| 1947 |
508 |
2197 | (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 |
| |
