Jacob C Halpern
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Paris-ch op | ??/??/1988 | 777 | France |
| Manhattan CC-Brooklyn CC | ??/??/1907 | 0 | United States |
| Manhattan CC-Franklin CC | ??/??/1907 | 0 | United States |
| Manhattan CC- Franklin CC | ??/??/1906 | 0 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| C50 | King's pawn game | 2 games |
| C42 | Petrov's defence | 2 games |
| C21 | Centre game | 1 games |
| C68 | Ruy Lopez, exchange variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C10 | French, Paulsen variation | 2 games |
| C25 | Vienna game | 2 games |
| D00 | Queen's pawn game | 2 games |
| D07 | Queen's Gambit Declined, Chigorin defence | 1 games |


France
United States