Klaus Piotrowski
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Seniors Derby 5th | 04/20/2006 | 1661 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| B20 | Sicilian defence | 1 games |
| C40 | King's knight opening | 1 games |
| D00 | Queen's pawn game | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D58 | Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) system | 1 games |
| A04 | Reti opening | 1 games |
| A00 | Polish (Sokolsky) opening | 1 games |
| C42 | Petrov's defence | 1 games |


Germany