| Ratings 
 
 
  | Year | Rank | Edo | Dev. | Games |  
  | 1927 | 264 | 2294 | (53) | 13 |  
  | 1928 | 228 | 2315 | (47) | 14 |  
  | 1929 | 275 | 2293 | (53) | 0 |  
  | 1930 | 357 | 2270 | (53) | 11 |  
  | 1931 | 507 | 2232 | (62) | 5 |  
  | 1932 | 576 | 2216 | (74) | 0 |  
  | 1933 | 662 | 2200 | (85) | 1 |  
 
Rating table notes
 | 
| Biographical data |  | 
   | Name: Wertheim, Willem Fredrik |  
   | Born: 16 Nov. 1907 |  
   | Died: 3 Nov. 1998 |  |  |  |  
   | References |  | 
| Books |  
   | Di Felice, Chess Results, 1921-1930, page 341 |  
   | Di Felice, Chess Results, 1931-1935, page 409 |  
   | Gaige, Chess Personalia, page 461 |  
   | Skinner and Verhoeven, Alexander Alekhine's Chess Games, page 447, 454 |  
   | Thulin, Name index to CTC, page 296 |  | Web |  
   | [Willem Frederik Wertheim] |  |  |