Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
458 |
2079 | (77) | 9 |
| 1902 |
471 |
2078 | (79) | 0 |
| 1903 |
479 |
2077 | (81) | 0 |
| 1904 |
507 |
2077 | (80) | 0 |
| 1905 |
523 |
2076 | (78) | 0 |
| 1906 |
543 |
2076 | (74) | 0 |
| 1907 |
548 |
2075 | (68) | 0 |
| 1908 |
558 |
2075 | (58) | 14 |
| 1909 |
555 |
2099 | (59) | 0 |
| 1910 |
498 |
2124 | (54) | 0 |
| 1911 |
509 |
2149 | (43) | 30 |
| 1912 |
518 |
2131 | (50) | 0 |
| 1913 |
551 |
2112 | (48) | 20 |
| 1914 |
562 |
2084 | (59) | 0 |
| 1915 |
562 |
2055 | (64) | 6 |
| 1916 |
587 |
2040 | (73) | 0 |
| 1917 |
593 |
2024 | (80) | 0 |
| 1918 |
617 |
2009 | (85) | 0 |
| 1919 |
633 |
1993 | (89) | 0 |
| 1920 |
725 |
1978 | (91) | 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 |
| |
