Pereira, Roberto
Current rating: 1447
Record: 4-7-2
| Grand Prix Sao Paulo 2012 (M13 limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 268 | Liguori Marcelino, Harlei (1500) | Draw 1-1 | 01481 |
| 2sealed | 196 | Borgert, Marina (1502) | Won 2-0 | +181499 |
| 3sealed | 103 | Neto, Joao De Mello Rezende (1518) | Lost 0-2 | -171482 |
| 4sealed | 207 | Furukawa, Marcelo (1518) | Lost 0-2 | -181464 |
| 5sealed | 261 | Marinho, Vinicius (1482) | Lost 0-2 | -171447 |
| average opponent: 1504record: 1-3-1 | new rating: 1447 | |||
| Grand Prix Sao Paulo 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 180 | Glasser, Roger (1487) | Lost 1-2 | -181482 |
| 2standard | 168 | Feliciano dos Santos, Guilherme (1481) | Draw 1-1 | 01482 |
| 3standard | 238 | Braz, Thiago (1482) | Lost 1-2 | -181464 |
| 4standard | 293 | Eduardo, Paulo R (1464) | Won 2-0 | +181482 |
| 5standard | 251 | Luis Fernando de J. Tu, (1482) | Won 2-0 | +181500 |
| 6standard | 195 | Oyarzun, Julio Cesar (1451) | Won 0-0 | +171517 |
| 7standard | 149 | Lucas Pereira, (1500) | Lost 1-2 | -181499 |
| 8standard | 140 | Borges Vilela Junior, Sergio (1499) | Lost 0-2 | -181481 |
| average opponent: 1481record: 3-4-1 | new rating: 1481 | |||