Pereira, Jonny A
Current rating: 1464
Record: 3-5-1
| Grand Prix Sao Paulo 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 157 | Arauso, Leonardo de S (1500) | Won 2-1 | +181518 |
| 2sealed | 109 | Herschel, Denis (1518) | Lost 0-2 | -181500 |
| 3sealed | 245 | De Paula Gomes, Rodrigo (1500) | Lost 0-2 | -181482 |
| 4sealed | 225 | Huang, Veronica (1484) | Draw 1-1 | 01482 |
| 5sealed | 266 | Huang, Alex (1475) | Won 2-0 | +181500 |
| 6sealed | 200 | Pessini, Henrique Oliveira (1461) | Lost 0-2 | -191481 |
| 7sealed | 201 | Bonfim Moreira, Thiago (1482) | Lost 1-2 | -181463 |
| 8sealed | 176 | Jeronimo, Fernando Granha (1482) | Won 2-0 | +191482 |
| 9sealed | 138 | Dotta, Artur (1497) | Lost 0-2 | -181464 |
| average opponent: 1489record: 3-5-1 | new rating: 1464 | |||