| 
 
Tonkin, G.N. 
  
 
 
| Ratings 
 
 
  | Year | Rank | Edo | Dev. | Games |  
  | 1922 | 1139 | 1916 | (62) | 16 |  
  | 1923 | 1264 | 1925 | (61) | 11 |  
  | 1924 | 1307 | 1907 | (67) | 1 |  
  | 1925 | 1394 | 1898 | (71) | 0 |  
  | 1926 | 1487 | 1889 | (72) | 0 |  
  | 1927 | 1508 | 1880 | (71) | 12 |  
 
Rating table notes
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| Biographical data |  | 
   | Name: Tonkin, G.N. |  
   | Born: |  
   | Died: |  |  |  |  
   | References |  | 
| Books |  
   | Di Felice, Chess Results, 1921-1930, page 339 |  | Periodicals |  
   | [SMH], no. 26830, 2 Jan. 1924, page 10 |  |  | 
 
 Tournament data 
 
 
| Player information updated: 27 Apr. 2021 |  
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