Peterson, William
Current rating: 1335
| Grand Prix Milan 2014 (modern) | starting rating: 1401 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 87 | Oggioni, Carloalberto (1500) | Lost 0-2 | -161385 |
| 2modern | 574 | Gollor, Marcus (1380) | Lost 0-2 | -181367 |
| 3modern | 742 | Taipan, Givanni Pace (1468) | Lost 0-2 | -161351 |
| 4modern | 753 | Gigliarano, Angelo (1447) | Lost 0-2 | -161335 |
| top | average opponent: 1449record: 0-4 | new rating: 1335 | ||
| Grand Prix Prague 2013 (M14 limited) | starting rating: 1432 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 231 | Danz, Jakob (1502) | Lost 0-2 | -171415 |
| 2sealed | 436 | Mede, Tobias (1512) | Lost 0-2 | -161399 |
| 3sealed | 645 | Lipinski, Maciej (1464) | Won 2-0 | +191418 |
| 4sealed | 684 | Sommer, Eugen (1498) | Lost 0-2 | -171401 |
| top | average opponent: 1494record: 1-3 | new rating: 1401 | ||
| Grand Prix Rimini 2013 (M14 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 85 | Terracciano, Daniele (1430) | Lost 1-2 | -191481 |
| 2sealed | 264 | Romano, Luca (1408) | Lost 0-2 | -201461 |
| 3sealed | 416 | Cirigliano, Matteo (1818) | Lost 0-2 | -111450 |
| 4sealed | 499 | Giacometti, Giulio (1447) | Lost 1-2 | -181432 |
| top | average opponent: 1526record: 0-4 | new rating: 1432 | ||