Ammann, Petra
Current rating: 1502
Record: 15-14-6
| Grand Prix Bochum 2010 (SOM limited) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 303 | Kanter, Lars (1512) | Draw 1-1 | 01507 |
| 2sealed | 231 | Lazaro, Marc (1483) | Lost 1-2 | -181489 |
| 3sealed | 317 | Knipping, Kai (1480) | Draw 1-1 | 01489 |
| 4sealed | 366 | Cardiel, Marta (1214) | Won 2-1 | +131502 |
| top | average opponent: 1422record: 1-1-2 | new rating: 1502 | ||
| Grand Prix Paris 2009 (ZEN limited) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 186 | Gosciniak, Nicolas (1500) | Lost 1-2 | -181468 |
| 2sealed | 260 | Pichere, Christian (1434) | Lost 0-2 | -191449 |
| 3sealed | 391 | Le Montagner, Olivier (1535) | Lost 1-2 | -161433 |
| 4sealed | 430 | Mampaey, Herwig (1425) | Won 1-0 | +181451 |
| 5sealed | 377 | Arbouche, Kader (1466) | Won 2-1 | +181469 |
| 6sealed | 292 | Pierlet, Jocelyne (1481) | Won 2-0 | +181487 |
| 7sealed | 223 | Torea Figueiras, Carlo (1446) | Won 2-0 | +181505 |
| 8sealed | 175 | Marsal, Basile (1631) | Won 2-1 | +201525 |
| 9sealed | 106 | Barthelemy, Sebastien (1540) | Lost 1-2 | -181507 |
| top | average opponent: 1495record: 5-4 | new rating: 1507 | ||
| Grand Prix Paris 2008 (ALA limited) | starting rating: 1505 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 30 | Chatelais, Benjamin (1500) | Lost 0-2 | -181487 |
| 2sealed | 264 | Chan, Waikit (1411) | Draw 1-1 | -11486 |
| top | average opponent: 1456record: 0-1-1 | new rating: 1486 | ||
| Grand Prix Stuttgart 2007 (LRW limited) | starting rating: 1546 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 147 | Schell, David (1481) | Lost 0-2 | -191527 |
| 2sealed | 243 | Runge, Jurgen (1482) | Draw 1-1 | -11526 |
| 3sealed | 254 | Verbeeck, Matthias (1454) | Won 2-0 | +171543 |
| 4sealed | 228 | Czuprynski, Krystian (1505) | Lost 0-2 | -191524 |
| 5sealed | 244 | Pfeffer, Lukas (1467) | Lost 1-2 | -191505 |
| top | average opponent: 1478record: 1-3-1 | new rating: 1505 | ||
| Grand Prix Munich 2003 (MRD limited) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 69 | Mecci, Fabrizio (1500) | Won 2-0 | +171568 |
| 2sealed | 19 | Barth, Fabian (1509) | Lost 0-2 | -191549 |
| 3sealed | 259 | Klumpp, Berthold (1499) | Won 2-0 | +171566 |
| 4sealed | 184 | Platt, Christoph (1546) | Lost 0-2 | -181548 |
| 5sealed | 242 | Juza, Martin (1511) | Lost 1-2 | -191529 |
| 6sealed | 270 | Rickenbacher, Ivo (1486) | Won 2-1 | +171546 |
| top | average opponent: 1509record: 3-3 | new rating: 1546 | ||
| Grand Prix Lyon 2003 (MRD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 8 | Lapoujade, Lilian (1427) | Draw 1-1 | -11499 |
| 2sealed | 261 | Leang, Francois (1500) | Won 1-0 | +181517 |
| 3sealed | 151 | Briand, Christophe (1518) | Draw 1-1 | 01517 |
| 4sealed | 281 | Roux, Vincent (1408) | Lost 0-2 | -201497 |
| 5sealed | 341 | Autem, Antoine (1497) | Lost 0-2 | -181479 |
| 6sealed | 346 | Billot, Bertrand (1479) | Won 2-0 | +181497 |
| 7sealed | 260 | Marinkovic, Goran (1401) | Won 2-1 | +161513 |
| 8sealed | 184 | Ludin, Michael (1517) | Won 2-1 | +181531 |
| 9sealed | 126 | Comulada, Ricard (1641) | Won 2-1 | +201551 |
| top | average opponent: 1488record: 5-2-2 | new rating: 1551 | ||