Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1933 |
1493 |
1878 | (113) | 5 |
| 1934 |
1600 |
1877 | (114) | 0 |
| 1935 |
1586 |
1876 | (114) | 0 |
| 1936 |
1488 |
1876 | (113) | 0 |
| 1937 |
1385 |
1875 | (113) | 0 |
| 1938 |
1353 |
1874 | (111) | 0 |
| 1939 |
1164 |
1874 | (110) | 7 |
Rating table notes
|
| Biographical data |
| Name: Boersma, G. |
| Born: |
| Died: |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1931-1935, page 376 |
| Di Felice, Chess Results, 1936-1940, page 348 |
| Skinner and Verhoeven, Alexander Alekhine's Chess Games, page 479 |
| |
