Jon Halfdanarson
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| ISL-chT 0405 | 11/19/2004 | 1766 | Iceland |
| ISL-chT 0001 | 11/17/2000 | 1600 | Iceland |
| Bundesliga 8384 | 10/??/1983 | 1440 | Germany |
| Bundesliga 8081 | 10/??/1980 | 1203 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| A32 | English, symmetrical variation | 2 games |
| A07 | Reti, King's Indian attack (Barcza system) | 2 games |
| D36 | Queen's Gambit Declined, exchange, positional line, 6.Qc2 | 1 games |
| D07 | Queen's Gambit Declined, Chigorin defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D35 | Queen's Gambit Declined, 3...Nf6 | 3 games |
| C77 | Ruy Lopez, Morphy defence | 2 games |
| C04 | French, Tarrasch, Guimard main line | 2 games |
| D60 | Queen's Gambit Declined, Orthodox defence | 1 games |
Iceland
Male
FIDE ID:

Germany