Petto Jr., Sergio
Current rating: 1517
Record: 4-3
| Grand Prix Sao Paulo 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 223 | Quinta, Matheus Chaud (1539) | Lost 0-2 | -171483 |
| 2sealed | 248 | De Oliveira, Anderson (1483) | Won 2-1 | +181501 |
| 3sealed | 128 | Tolin, Ramiro (1500) | Lost 0-2 | -181483 |
| 4sealed | 309 | Mansim, Plinio (1482) | Won 2-0 | +181501 |
| 5sealed | 236 | Renaut, Julien (1501) | Won 2-0 | +181519 |
| 6sealed | 123 | Giovanini, Valdebrando (1535) | Won 2-0 | +181537 |
| 7sealed | 117 | Souza, Joao Claudio (1441) | Lost 1-2 | -201517 |
| average opponent: 1497record: 4-3 | new rating: 1517 | |||