Donald Byrne
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| USA-ch | 09/??/1973 | 2396 | United States |
| San Antonio | ??/??/1972 | 2525 | United States |
| Novi Sad | ??/??/1972 | 0 | |
| USA-ch | ??/??/1969 | 0 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| A36 | English, symmetrical variation | 22 games |
| A25 | English, Sicilian reversed | 8 games |
| A12 | English, Caro-Kann defensive system | 8 games |
| A26 | English, closed system | 7 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B77 | Sicilian, dragon, Yugoslav attack, 9.Bc4 | 20 games |
| D76 | Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6 | 4 games |
| E65 | King's Indian, fianchetto, Yugoslav, 7.O-O | 4 games |
| A16 | English opening | 4 games |


United States