| Ratings 
 
 
  | Year | Rank | Edo | Dev. | Games |  
  | 1896 | 808 | 1901 | (77) | 10 |  
  | 1897 | 791 | 1910 | (76) | 8 |  
  | 1898 | 787 | 1919 | (81) | 0 |  
  | 1899 | 796 | 1928 | (85) | 0 |  
  | 1900 | 806 | 1937 | (86) | 0 |  
  | 1901 | 790 | 1946 | (86) | 0 |  
  | 1902 | 778 | 1955 | (85) | 0 |  
  | 1903 | 755 | 1964 | (82) | 9 |  
 
Rating table notes
 | 
| Biographical data |  | 
   | Name: Balk, Oscar |  
   | Born: 4 May 1864 |  
   | Died: 11 Jan. 1942 |  |  |  |  
   | References |  | 
| Books |  
   | Bignold, Australian Chess Annual, page 107 |  | Periodicals |  
   | [ODT], no. 11312, 4 Jan. 1899, page 4 |  
   | [ODT], no. 12552, 5 Jan. 1903, page 3 |  | Web |  
   | Wilson, Bill.  [Oscar Balk] |  |  |