Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
1174 |
1450 | (128) | 15 |
| 1902 |
1147 |
1447 | (131) | 0 |
| 1903 |
1093 |
1445 | (134) | 0 |
| 1904 |
1139 |
1442 | (137) | 0 |
| 1905 |
1197 |
1439 | (139) | 0 |
| 1906 |
1150 |
1437 | (141) | 0 |
| 1907 |
1197 |
1434 | (143) | 0 |
| 1908 |
1195 |
1432 | (145) | 0 |
| 1909 |
1290 |
1429 | (147) | 0 |
| 1910 |
1272 |
1426 | (149) | 0 |
| 1911 |
1279 |
1424 | (150) | 12 |
Rating table notes
|
| Biographical data |
| Name: Couper, Charles Sumner |
| Born: |
| Died: |
| |
| Notes: |
| Gaige and Di Felice have 'C.S. Cooper' at Excelsior 1901, but 'C.S. Couper' at Excelsior 1911; chessgames.com has 'Charles Sumner Couper' at both. The Minneapolis Journal of 19 Aug. 1901 has 'C.S. Couper'. |
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| References |
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