Karl Heinz Osterwald
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| OWL-ch | 04/??/1950 | 0 |  Germany |
Most Played Openings as White
| ECO | Opening | Games |
| C04 | French, Tarrasch, Guimard main line | 1 games |
| B95 | Sicilian, Najdorf, 6...e6 | 1 games |
| B58 | Sicilian, classical | 1 games |
| B73 | Sicilian, dragon, classical, 8.O-O | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A33 | English, symmetrical variation | 2 games |
| D46 | Queen's Gambit Declined semi-Slav, 6.Bd3 | 1 games |
| D30 | Queen's gambit declined | 1 games |
| B24 | Sicilian, closed | 1 games |
