Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
528 |
2075 | (76) | 9 |
| 1902 |
547 |
2074 | (79) | 0 |
| 1903 |
559 |
2074 | (80) | 0 |
| 1904 |
583 |
2073 | (80) | 0 |
| 1905 |
594 |
2072 | (78) | 0 |
| 1906 |
611 |
2071 | (74) | 0 |
| 1907 |
619 |
2070 | (67) | 0 |
| 1908 |
643 |
2069 | (58) | 14 |
| 1909 |
629 |
2095 | (58) | 0 |
| 1910 |
558 |
2120 | (54) | 0 |
| 1911 |
541 |
2146 | (42) | 30 |
| 1912 |
568 |
2128 | (50) | 0 |
| 1913 |
613 |
2109 | (48) | 20 |
| 1914 |
632 |
2082 | (58) | 0 |
| 1915 |
652 |
2055 | (64) | 6 |
| 1916 |
677 |
2040 | (73) | 0 |
| 1917 |
698 |
2025 | (80) | 0 |
| 1918 |
727 |
2010 | (85) | 0 |
| 1919 |
760 |
1995 | (89) | 0 |
| 1920 |
869 |
1980 | (92) | 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 |
| |
