R.Costa, Cristian
Current rating: 1517
Record: 7-6-1
| Grand Prix Porto Alegre 2017 (AER standard) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 55 | Rodolfo Da Silva, Heitor (1500) | Lost 1-2 | -181501 |
| 2standard | 156 | Borges, Daniel (1481) | Lost 1-2 | -191482 |
| 3standard | 264 | Salotti, Leonardo (1463) | Won 2-0 | +181500 |
| 4standard | 253 | Paiva Luquez, Gustavo (1471) | Won 2-1 | +171517 |
| 5standard | 158 | Dos Anjos, Gabriel (1467) | Won 2-1 | +181535 |
| 6standard | 104 | Malquichagua, Manuel (1500) | Lost 0-2 | -191516 |
| 7standard | 175 | Vargas Paez, Javier (1576) | Won 2-1 | +191535 |
| 8standard | 108 | Lira, Vinicius (1518) | Lost 0-2 | -181517 |
| average opponent: 1497record: 4-4 | new rating: 1517 | |||
| Grand Prix Sao Paulo 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 78 | Amauim, Felipe (1500) | Draw 1-1 | 01500 |
| 2sealed | 185 | Jesus, Rogerio (1499) | Won 2-0 | +181518 |
| 3sealed | 112 | Liguori Marcelino, Harlei (1518) | Won 2-0 | +181536 |
| 4sealed | 80 | Leite de Farias, Clayton (1552) | Lost 0-2 | -181518 |
| 5sealed | 147 | Archangelo, Felipe (1560) | Won 2-0 | +191537 |
| 6sealed | 90 | Teixiera Dos Santos, Thiago (1537) | Lost 1-2 | -181519 |
| average opponent: 1527record: 3-2-1 | new rating: 1519 | |||