Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1933 |
1723 |
1888 | (113) | 5 |
| 1934 |
1815 |
1888 | (113) | 0 |
| 1935 |
1822 |
1888 | (113) | 0 |
| 1936 |
1764 |
1887 | (113) | 0 |
| 1937 |
1659 |
1887 | (112) | 0 |
| 1938 |
1648 |
1886 | (111) | 0 |
| 1939 |
1510 |
1886 | (109) | 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 |
| |
