Rafael Jacobsen,
Current rating: 1481
Record: 2-3
| Grand Prix Sao Paulo 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 141 | Felipe Doretto, (1500) | Lost 0-2 | -181482 |
| 2standard | 234 | guilherme vasconcelos, (1482) | Lost 0-2 | -181464 |
| 3standard | 280 | Diego Jucosky, (1464) | Won 2-0 | +181482 |
| 4standard | 288 | De Albuquerque Silva, Rodrigo (1483) | Won 2-0 | +181500 |
| 5standard | 172 | Luiz F Kraft Gallego, (1465) | Lost 1-2 | -191481 |
| average opponent: 1479record: 2-3 | new rating: 1481 | |||