Udo Petersen
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Schleswig Holstein-ch | ??/??/1991 | 0 |  Germany |
| Schleswig Holstein-chA 45th | ??/??/1990 | 0 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| A85 | Dutch with c4 & Nc3 | 1 games |
| E70 | King's Indian, 4.e4 | 1 games |
| B14 | Caro-Kann, Panov-Botvinnik attack, 5...e6 | 1 games |
| A40 | Queen's pawn | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C02 | French, advance variation | 2 games |
| D46 | Queen's Gambit Declined semi-Slav, 6.Bd3 | 1 games |
| C18 | French, Winawer, advance variation | 1 games |
| D30 | Queen's gambit declined | 1 games |
