Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
436 |
2065 | (77) | 9 |
| 1902 |
444 |
2065 | (80) | 0 |
| 1903 |
453 |
2065 | (81) | 0 |
| 1904 |
478 |
2065 | (80) | 0 |
| 1905 |
484 |
2065 | (78) | 0 |
| 1906 |
498 |
2065 | (74) | 0 |
| 1907 |
509 |
2065 | (68) | 0 |
| 1908 |
513 |
2065 | (59) | 14 |
| 1909 |
499 |
2091 | (59) | 0 |
| 1910 |
451 |
2116 | (55) | 0 |
| 1911 |
438 |
2142 | (44) | 30 |
| 1912 |
439 |
2126 | (51) | 0 |
| 1913 |
438 |
2111 | (51) | 20 |
| 1914 |
431 |
2093 | (64) | 0 |
| 1915 |
433 |
2076 | (73) | 0 |
| 1916 |
456 |
2058 | (80) | 0 |
| 1917 |
456 |
2041 | (85) | 0 |
| 1918 |
475 |
2023 | (89) | 0 |
| 1919 |
490 |
2005 | (92) | 0 |
| 1920 |
567 |
1988 | (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 |
| |
