Mafra, Marcelo
Current rating: 1537
Record: 5-3
| Grand Prix Sao Paulo 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 499 | Karlinke Junior, Theobaldo (1500) | Lost 1-2 | -181482 |
| 2modern | 448 | Faleiro Da Silva, Pedro Henrique (1483) | Won 2-0 | +181500 |
| 3modern | 282 | Morais, Mario (1507) | Won 2-0 | +181518 |
| 4modern | 385 | De Andrade, Leonardo Muniz (1517) | Won 2-1 | +181536 |
| 5modern | 239 | Fernandes Lelis, Joao (1801) | Won 2-1 | +231559 |
| 6modern | 60 | Neto, Araken (1459) | Lost 0-2 | -201539 |
| 7modern | 205 | Alves, Gustavo (1445) | Won 2-0 | +161555 |
| 8modern | 86 | Modolo Diz, Kim (1552) | Lost 1-2 | -181537 |
| average opponent: 1533record: 5-3 | new rating: 1537 | |||