Trettel, Marco
Current rating: 1331
Record: 3-14-1
| Grand Prix Utrecht 2019 (ELD limited) | starting rating: 1376 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 287 | Boeschoten, Thomas (1444) | Lost 0-2 | -171359 |
| 2sealed | 625 | Bachmann, Andreas (1451) | Lost 0-2 | -161343 |
| 3sealed | 640 | Jerabek, Petr (1700) | Lost 0-2 | -121331 |
| top | average opponent: 1532record: 0-3 | new rating: 1331 | ||
| Grand Prix Strasbourg 2013 (legacy) | starting rating: 1419 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 125 | Marchand, Antoine (1500) | Lost 1-2 | -171402 |
| 2legacy | 378 | Gherbezza, Romain (1512) | Lost 0-2 | -161386 |
| 3legacy | 547 | Gobert, Guillaume (1500) | Won 0-0 | +201406 |
| 4legacy | 536 | Barthel, Jeff (1483) | Lost 1-2 | -161390 |
| 5legacy | 565 | Longoni, Raphael (1644) | Lost 0-2 | -141376 |
| top | average opponent: 1528record: 1-4 | new rating: 1376 | ||
| Grand Prix Amsterdam 2011 (legacy) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 874 | Burger, Sander (1500) | Lost 1-2 | -171411 |
| 2legacy | 937 | Pace, Marco (1487) | Won 2-1 | +191430 |
| 3legacy | 799 | Magri, Saverio (1612) | Lost 1-2 | -141416 |
| 4legacy | 907 | Van Der Laan, Theo (1482) | Won 2-0 | +191435 |
| 5legacy | 828 | Kreis, Benjamin (1466) | Draw 1-1 | 01435 |
| 6legacy | 874 | Piipponen, Marko (1504) | Lost 0-2 | -161419 |
| top | average opponent: 1509record: 2-3-1 | new rating: 1419 | ||
| Grand Prix Bologna 2005 (SOK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 184 | Mazzarino, Marcello (1516) | Lost 1-2 | -181482 |
| 2sealed | 181 | Bergamaschi, Paolo (1467) | Lost 0-2 | -181464 |
| 3sealed | 262 | Righini, Marco (1448) | Lost 0-2 | -181446 |
| 4sealed | 285 | Turriziani, Roberto (1445) | Lost 0-2 | -181428 |
| top | average opponent: 1469record: 0-4 | new rating: 1428 | ||