Theodor Mertin
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Verbandsliga 0405 | 10/31/2004 | 1969 |  Germany |
| NRW-Liga I 9293 | 10/??/1993 | 1031 | Germany |
| Oberliga NRW 8586 | ??/??/1985 | 293 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| E19 | Queen's Indian, old main line, 9.Qxc3 | 1 games |
| D59 | Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5 | 1 games |
| B72 | Sicilian, dragon, 6.Be3 | 1 games |
| E95 | King's Indian, orthodox, 7...Nbd7, 8.Re1 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A45 | Queen's pawn game | 1 games |
| B22 | Sicilian, Alapin's variation (2.c3) | 1 games |
| B78 | Sicilian, dragon, Yugoslav attack, 10.O-O-O | 1 games |
| B53 | Sicilian, Chekhover variation | 1 games |
