Costa, Marino
Current rating: 1444
Record: 1-4
| Grand Prix Toronto 2017 (HOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 333 | Harms, Nick (1474) | Lost 0-2 | -181482 |
| 2sealed | 487 | Leung, Jason (1414) | Lost 0-2 | -201462 |
| 3sealed | 620 | Whitford, Thomas (1429) | Won 2-0 | +181480 |
| 4sealed | 491 | Dahmer, TJ (1485) | Lost 0-2 | -181462 |
| 5sealed | 552 | Lee, Min Woo (1465) | Lost 0-2 | -181444 |
| average opponent: 1453record: 1-4 | new rating: 1444 | |||