Mahrwald, Valentin
Current rating: 1423
| Grand Prix London 2013 (GTC limited) | starting rating: 1458 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 68 | Pirouet, Ian (1453) | Lost 1-2 | -181440 |
| 2sealed | 579 | Eade, Jon (1481) | Won 2-0 | +181458 |
| 3sealed | 592 | Richardson, Paul M (1471) | Lost 0-2 | -171441 |
| 4sealed | 842 | Pisula, Marcin (1482) | Lost 0-2 | -181423 |
| top | average opponent: 1472record: 1-3 | new rating: 1423 | ||
| Grand Prix Brighton 2009 (M10 limited) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 38 | Filatriau, Franck (1544) | Lost 0-2 | -171493 |
| 3sealed | 263 | Holmes, Conor (1489) | Lost 1-2 | -181475 |
| 4sealed | 294 | Suther, Lars (1522) | Lost 1-2 | -171458 |
| top | average opponent: 1518record: 0-3 | new rating: 1458 | ||
| Grand Prix Paris 2008 (ALA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 583 | Hautot, Mathieu (1502) | Won 2-1 | +181518 |
| 5sealed | 543 | Lefebvre, Gaetan (2049) | Lost 0-2 | -91509 |
| 6sealed | 578 | Lesaege, Clement (1556) | Won 2-1 | +191528 |
| 7sealed | 517 | Malukov, Pavel (1562) | Lost 0-2 | -181510 |
| top | average opponent: 1667record: 2-2 | new rating: 1510 | ||