Costa, Andrew
Current rating: 1481
Record: 5-6
| Grand Prix Sacramento 2014 (THS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1155 | Johnson, Mark (1454) | Won 2-1 | +171517 |
| 2sealed | 1083 | Simon-welch, Aaron (1518) | Lost 1-2 | -181499 |
| 3sealed | 1250 | Howell, Joseph (1501) | Won 2-0 | +181517 |
| 4sealed | 1126 | Wendorf, Eric (1517) | Lost 1-2 | -181499 |
| 5sealed | 1192 | Chu, Terence (1462) | Lost 0-2 | -181481 |
| average opponent: 1490record: 2-3 | new rating: 1481 | |||
| Grand Prix Toronto 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 167 | Cosovic, Dejan (1556) | Lost 1-2 | -171483 |
| 2modern | 299 | WHITEHEAD, JESSE (1482) | Lost 0-2 | -181465 |
| 3modern | 406 | Alfano, Mike (1481) | Won 2-0 | +181483 |
| 4modern | 422 | Giacopello, Giuseppe (1434) | Won 2-0 | +171500 |
| 5modern | 314 | Agnew, Andrew (1503) | Won 2-0 | +181518 |
| 6modern | 186 | Fumerton, Jesse (1503) | Lost 0-2 | -181500 |
| average opponent: 1493record: 3-3 | new rating: 1500 | |||