Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1925 |
1467 |
1879 | (79) | 9 |
| 1926 |
1532 |
1893 | (80) | 0 |
| 1927 |
1529 |
1907 | (79) | 9 |
Rating table notes
|
| Biographical data |
| Name: Costigan, G. |
| Born: |
| Died: |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1921-1930, page 321 |
| Thulin, Name index to CTC, page 51 |
| |
