Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
417 |
2067 | (77) | 9 |
| 1902 |
425 |
2067 | (80) | 0 |
| 1903 |
424 |
2067 | (81) | 0 |
| 1904 |
450 |
2067 | (80) | 0 |
| 1905 |
470 |
2067 | (78) | 0 |
| 1906 |
488 |
2067 | (74) | 0 |
| 1907 |
493 |
2067 | (68) | 0 |
| 1908 |
501 |
2067 | (59) | 14 |
| 1909 |
482 |
2093 | (59) | 0 |
| 1910 |
439 |
2119 | (55) | 0 |
| 1911 |
424 |
2145 | (44) | 30 |
| 1912 |
424 |
2129 | (52) | 0 |
| 1913 |
418 |
2114 | (51) | 20 |
| 1914 |
413 |
2096 | (64) | 0 |
| 1915 |
406 |
2079 | (73) | 0 |
| 1916 |
428 |
2062 | (80) | 0 |
| 1917 |
428 |
2044 | (86) | 0 |
| 1918 |
438 |
2027 | (89) | 0 |
| 1919 |
455 |
2010 | (92) | 0 |
| 1920 |
532 |
1992 | (94) | 6 |
Rating table notes
|
| Biographical data |
| Name: Isakov, Konstantin Ivanovich |
| Born: |
| Died: |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1901-1920, page 307 |
| Gaige, Chess Personalia, page 187 |
| Skinner and Verhoeven, Alexander Alekhine's Chess Games, page 17, 19 |
| Thulin, Name index to CTC, page 118 |
| |
