John Jacobsen
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Buenos Aires ol (Men) | 10/25/1978 | 2313 | Argentina |
Most Played Openings as White
| ECO | Opening | Games |
| C09 | French, Tarrasch, open variation, main line | 1 games |
| C10 | French, Paulsen variation | 1 games |
| A43 | Old Benoni defence | 1 games |
| C05 | French, Tarrasch, closed variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B33 | Sicilian defence | 4 games |
| B22 | Sicilian, Alapin's variation (2.c3) | 1 games |
| D13 | Queen's Gambit Declined Slav, exchange variation | 1 games |
Male
FIDE ID:

Argentina