Roberto Mendes da Cost,
Current rating: 1482
Record: 3-4-2
| Grand Prix Sao Paulo 2015 (DTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 6 | Costa, Leonardo (1500) | Won 2-1 | +181518 |
| 2standard | 49 | Moraga Galdames, Jorge Pablo (1579) | Lost 0-2 | -171501 |
| 3standard | 478 | Marques Gaio da Silva, Evandro (1500) | Draw 1-1 | 01501 |
| 4standard | 394 | Utiyama da Silva, Bruno (1500) | Lost 0-2 | -181483 |
| 5standard | 488 | Mury Franca de Medeiros, Carlos Eduardo (1482) | Won 1-0 | +181501 |
| 6standard | 361 | Bonow Bosel, Eduardo (1502) | Won 2-0 | +181519 |
| 7standard | 267 | Vinicius De Oliveira Silva, Carlos (1518) | Draw 1-1 | 01519 |
| 8standard | 269 | Scussel Oliveira Azor, (1519) | Lost 0-2 | -181501 |
| 9standard | 244 | Poleva, Anna (1468) | Lost 1-2 | -191482 |
| average opponent: 1508record: 3-4-2 | new rating: 1482 | |||