Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
420 |
2065 | (77) | 9 |
| 1902 |
427 |
2065 | (80) | 0 |
| 1903 |
431 |
2065 | (81) | 0 |
| 1904 |
452 |
2065 | (80) | 0 |
| 1905 |
476 |
2065 | (78) | 0 |
| 1906 |
492 |
2064 | (74) | 0 |
| 1907 |
504 |
2064 | (68) | 0 |
| 1908 |
508 |
2064 | (59) | 14 |
| 1909 |
491 |
2090 | (59) | 0 |
| 1910 |
440 |
2115 | (55) | 0 |
| 1911 |
431 |
2141 | (44) | 30 |
| 1912 |
426 |
2125 | (52) | 0 |
| 1913 |
422 |
2109 | (51) | 20 |
| 1914 |
413 |
2091 | (64) | 0 |
| 1915 |
404 |
2073 | (74) | 0 |
| 1916 |
422 |
2056 | (81) | 0 |
| 1917 |
423 |
2038 | (86) | 0 |
| 1918 |
434 |
2020 | (90) | 0 |
| 1919 |
447 |
2002 | (92) | 0 |
| 1920 |
527 |
1985 | (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 |
| |
