Bill Hallahan
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| New Hampshire op 50th U2100 | ??/??/2000 | 1921 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| C56 | Two knights defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D05 | Queen's pawn game | 1 games |


United States