Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1946 |
773 |
2085 | (74) | 7 |
| 1947 |
576 |
2092 | (73) | 9 |
Rating table notes
|
| Biographical data |
| Name: Marwitz, Jan Hendrik |
| Born: 8 Oct. 1915 |
| Died: |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1941-1946, page 350 |
| Di Felice, Chess Results, 1947-1950, page 15 |
| Gaige, Chess Personalia, page 272 |
| |
