Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
1147 |
1445 | (128) | 15 |
| 1902 |
1105 |
1443 | (131) | 0 |
| 1903 |
1054 |
1440 | (134) | 0 |
| 1904 |
1106 |
1438 | (137) | 0 |
| 1905 |
1153 |
1435 | (139) | 0 |
| 1906 |
1108 |
1432 | (141) | 0 |
| 1907 |
1150 |
1430 | (143) | 0 |
| 1908 |
1149 |
1427 | (145) | 0 |
| 1909 |
1243 |
1424 | (147) | 0 |
| 1910 |
1219 |
1422 | (148) | 0 |
| 1911 |
1243 |
1419 | (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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