Bill Costaras
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Detroit Motor City opA | ??/??/1994 | 78 |  United States |
| Troy MI Classic-M | ??/??/1993 | 892 | United States |
| Ohio-ch qual | ??/??/1980 | 0 | United States |
| Fischer tour simul | 03/??/1964 | 0 | United States |
Bill Costaras Repertoire with White pieces (most played)
| ECO | Opening | Games |
| C47 | Four knights, Scotch variation | 1 games |
| B76 | Sicilian, dragon, Yugoslav attack, 7...O-O | 1 games |
| B06 | Robatsch (modern) defence | 1 games |
| B07 | Pirc defence | 1 games |
Bill Costaras Repertoire with Black pieces (most played)
| ECO | Opening | Games |
| C65 | Ruy Lopez, Berlin defence | 1 games |
| B32 | Sicilian defence | 1 games |
| E74 | King's Indian, Averbakh, 6...c5 | 1 games |
| C64 | Ruy Lopez, classical (Cordel) defence | 1 games |
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