Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1926 |
1247 |
1939 | (113) | 7 |
Rating table notes
|
| Biographical data |
| Name: Gröning, M.G. |
| Born: |
| Died: |
| |
| Notes: |
| Could this be 'Gröning, [Martin] Ragner' (1898-1973), as listed in Chess Personalia? |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1921-1930, page 140 |
| Gaige, Chess Tournament Crosstables IV, page 706 |
| |
