Costey, Gregory
Current rating: 1538
Record: 9-7
| Grand Prix Bilbao 2019 (modern) | starting rating: 1542 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 212 | Martins, Pedro (1568) | Lost 1-2 | -171525 |
| 2modern | 501 | Cruz, Tiago (1488) | Won 2-0 | +171542 |
| 3modern | 449 | Lopez, Jesus (1374) | Won 2-1 | +151557 |
| 4modern | 256 | Riedl, Andreas (1365) | Won 2-1 | +141571 |
| 5modern | 334 | Aris Girbau, Arnau (1745) | Lost 1-2 | -141557 |
| 6modern | 234 | Martin Sanchez, Daniel (1505) | Won 2-1 | +171574 |
| 7modern | 213 | Saez Varea, Francisco (1536) | Lost 1-2 | -191555 |
| 8modern | 347 | Michea, Richard (1600) | Lost 0-2 | -171538 |
| average opponent: 1522record: 4-4 | new rating: 1538 | |||
| Grand Prix Barcelona 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 341 | Rutten, Alex (1579) | Lost 1-2 | -171483 |
| 2modern | 411 | Munoz, Raul (1409) | Won 2-1 | +171500 |
| 3modern | 626 | Vain, Dominique (1500) | Won 2-1 | +181518 |
| 4modern | 498 | Busquets, Joan (1621) | Won 2-1 | +201538 |
| 5modern | 165 | Pages Vidal, Marc (1766) | Lost 0-2 | -141524 |
| 6modern | 364 | Guarneri, Harold (1508) | Won 2-1 | +181542 |
| 7modern | 325 | Landvatter, Matthias (1565) | Lost 0-2 | -181524 |
| 8modern | 279 | Perez Gomez, Pedro Jose (1518) | Won 2-1 | +181542 |
| average opponent: 1558record: 5-3 | new rating: 1542 | |||