Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
420 |
2063 | (77) | 9 |
| 1902 |
425 |
2063 | (80) | 0 |
| 1903 |
430 |
2062 | (81) | 0 |
| 1904 |
449 |
2062 | (81) | 0 |
| 1905 |
466 |
2062 | (78) | 0 |
| 1906 |
486 |
2062 | (75) | 0 |
| 1907 |
491 |
2062 | (68) | 0 |
| 1908 |
490 |
2062 | (59) | 14 |
| 1909 |
474 |
2087 | (60) | 0 |
| 1910 |
426 |
2113 | (55) | 0 |
| 1911 |
407 |
2138 | (45) | 30 |
| 1912 |
399 |
2122 | (52) | 0 |
| 1913 |
383 |
2106 | (52) | 20 |
| 1914 |
354 |
2089 | (65) | 0 |
| 1915 |
331 |
2071 | (74) | 0 |
| 1916 |
343 |
2053 | (81) | 0 |
| 1917 |
336 |
2035 | (86) | 0 |
| 1918 |
335 |
2018 | (90) | 0 |
| 1919 |
328 |
2000 | (92) | 0 |
| 1920 |
385 |
1982 | (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 |
| Thulin, Name index to CTC, page 118 |
| |
