Coyston, Brad
Current rating: 1457
Record: 11-14
| Grand Prix Vancouver 2017 (modern) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2488 | Heinrichs, Victor (1500) | Lost 1-2 | -181474 |
| 2modern | 2466 | Zickler, Andrew (1534) | Lost 0-2 | -171457 |
| 3modern | 2679 | Murray, Kelly (1468) | Won 2-0 | +181475 |
| 4modern | 2517 | DeBruin, Garrett (1481) | Lost 1-2 | -171458 |
| 5modern | 2651 | Funston, John (1447) | Won 2-1 | +171475 |
| 6modern | 2463 | Clark, Rylan (1481) | Lost 1-2 | -181457 |
| top | average opponent: 1485record: 2-4 | new rating: 1457 | ||
| Grand Prix Vancouver 2016 (OGW limited) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 277 | Ayalde, Francis (1520) | Lost 1-2 | -181486 |
| 2sealed | 640 | Kormansek, Roman (1482) | Lost 0-2 | -181468 |
| 3sealed | 847 | Richmond, Jason (1465) | Won 0-0 | +181486 |
| 4sealed | 581 | Ing, Brett (1483) | Won 2-0 | +181504 |
| 5sealed | 423 | Cunningham, Jackson (1845) | Lost 0-2 | -121492 |
| top | average opponent: 1559record: 2-3 | new rating: 1492 | ||
| Grand Prix Las Vegas 2015 (2) (MM2 limited) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 349 | Magallanes, Alejandro (1500) | Won 2-0 | +191481 |
| 2sealed | 154 | Leach, Philip (1518) | Won 2-1 | +181499 |
| 3sealed | 124 | Rodriguez, Cesar (1519) | Won 2-1 | +191518 |
| 4sealed | 99 | Henson, Michael (1651) | Lost 1-2 | -161502 |
| 5sealed | 139 | Perez, Solomon (1536) | Lost 0-2 | -171485 |
| 6sealed | 236 | Rodriguez, Jescy (1512) | Won 2-0 | +181503 |
| 7sealed | 182 | Gonzalez, Nicholas (1536) | Won 2-0 | +191522 |
| 8sealed | 155 | Peck, Donald (1521) | Lost 0-2 | -181504 |
| top | average opponent: 1537record: 5-3 | new rating: 1504 | ||
| Grand Prix Vancouver 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 150 | Zickler, Andrew (1537) | Lost 1-2 | -171483 |
| 2modern | 451 | Vargas Garcia, Jose Ricardo (1483) | Won 2-0 | +181501 |
| 3modern | 253 | Bossenberry, Sean (1500) | Lost 1-2 | -181483 |
| 4modern | 375 | Dalrymple, Trevor (1431) | Won 2-0 | +171500 |
| 5modern | 365 | Doerksen, Stephane E (1501) | Lost 0-2 | -181482 |
| 6modern | 370 | Maine, Robert (1387) | Lost 0-2 | -201462 |
| top | average opponent: 1473record: 2-4 | new rating: 1462 | ||