Kowalski, Rafael
Current rating: 1465
Record: 2-4
| Grand Prix Sao Paulo 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 582 | Piria, Franco0181 (1466) | Lost 1-2 | -191481 |
| 2modern | 476 | Gonzalez, Matheus (1482) | Won 2-0 | +181499 |
| 3modern | 451 | Feres, Roberto (1438) | Won 2-0 | +171516 |
| 4modern | 189 | Lira Moreira, Andre (1562) | Lost 1-2 | -171499 |
| 5modern | 393 | Gonzalez Iturriaga, Francisco (1597) | Lost 1-2 | -161483 |
| 6modern | 420 | Barbosa, Erick (1481) | Lost 0-2 | -181465 |
| average opponent: 1504record: 2-4 | new rating: 1465 | |||