| Ratings 
 
 
  | Year | Rank | Edo | Dev. | Games |  
  | 1929 | 1707 | 1570 | (126) | 7 |  
  | 1930 | 1728 | 1570 | (126) | 7 |  
 
Rating table notes
 | 
| Biographical data |  | 
   | Name: Kettner, Karl Werner |  
   | Born: 26 Jan. 1908 |  
   | Died: 3 May 1942 |  |  |  |  
   | References |  | 
| Books |  
   | Di Felice, Chess Results, 1921-1930, page 327 |  
   | Gaige, Chess Personalia, page 211 |  
   | Thulin, Name index to CTC, page 131 |  |  |