| Ratings 
 
 
  | Year | Rank | Edo | Dev. | Games |  
  | 1895 | 1052 | 1641 | (149) | 14 |  
 
Rating table notes
 | 
| Biographical data |  | 
   | Name: Koppel, Karl |  | Also known as: C. Koppel |  
   | Born: |  
   | Died: 16 Oct. 1930 |  |  |  
   | Notes: |  
   | Di Felice has 'Koppel, Karl'; Tidsskrift for Skak (27 Jun. 1896, p.207) has 'C. Koppel'. |  |  |  |  
   | References |  | 
| Books |  
   | Gaige, Chess Personalia, page 222 |  
   | Krause, Rosendahl and Englund, De Nordiska Schackkongresserna, page B.1 |  
   | Urcan, Chess Fathering a Nation, page 11 |  | Periodicals |  
   | [TFS], vol. 2, no. 26, 27 June 1896, page 207 |  |  |