Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1901 |
1165 |
1449 | (128) | 15 |
| 1902 |
1138 |
1446 | (131) | 0 |
| 1903 |
1083 |
1443 | (134) | 0 |
| 1904 |
1131 |
1441 | (137) | 0 |
| 1905 |
1179 |
1438 | (139) | 0 |
| 1906 |
1136 |
1435 | (141) | 0 |
| 1907 |
1184 |
1433 | (143) | 0 |
| 1908 |
1178 |
1430 | (145) | 0 |
| 1909 |
1277 |
1427 | (147) | 0 |
| 1910 |
1249 |
1425 | (148) | 0 |
| 1911 |
1271 |
1422 | (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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