Piers, Will
Current rating: 1532
Record: 17-15-3
| Grand Prix Portland 2018 (modern) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 240 | Wamsley, Christopher (1470) | Won 2-0 | +181516 |
| 2modern | 179 | Dellinger, Israel (1561) | Lost 1-2 | -171499 |
| 3modern | 441 | Hill, Tucker (1592) | Lost 1-2 | -171482 |
| 4modern | 710 | Barrus, Travis (1447) | Won 2-0 | +181500 |
| 5modern | 598 | Pho, Brandon (1490) | Won 2-1 | +181518 |
| 6modern | 357 | Delucchi, Brian (1460) | Lost 1-2 | -191499 |
| 7modern | 461 | Humpherys, Nathan (1377) | Won 2-1 | +151514 |
| 8modern | 348 | Palmer, Ethan (1516) | Won 2-0 | +181532 |
| top | average opponent: 1489record: 5-3 | new rating: 1532 | ||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2073 | Virdee, Mathew (1500) | Won 2-1 | +171538 |
| 2modern | 2309 | Nguyen, Hoai (1518) | Lost 0-2 | -181520 |
| 3modern | 2587 | Huang, Ian (1502) | Lost 0-2 | -181502 |
| 4modern | 2660 | Hatch, Alex (1448) | Lost 0-2 | -191483 |
| 5modern | 2603 | Hockemeyer, Adam (1464) | Won 2-1 | +171500 |
| 6modern | 2569 | Lima Paulino, Davi (1486) | Lost 1-2 | -181482 |
| 7modern | 2559 | Anundsen, Dominic (1416) | Won 2-0 | +171499 |
| 8modern | 2441 | Lake, Greg (1482) | Won 2-1 | +171516 |
| 9modern | 2311 | Hausmanis, Peter (1516) | Lost 1-2 | -181498 |
| top | average opponent: 1481record: 4-5 | new rating: 1498 | ||
| Grand Prix Vancouver 2016 (OGW limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 710 | Curtis, Jeffrey (1500) | Draw 1-1 | +11483 |
| 2sealed | 444 | Ho, Bernhard (1513) | Won 2-0 | +181501 |
| 3sealed | 353 | Blank, Nathan (1520) | Won 0-0 | +191520 |
| 4sealed | 192 | Hazard, Domenic (1442) | Draw 1-1 | -21518 |
| 5sealed | 348 | Erickson, Kyle (1656) | Won 2-1 | +211539 |
| 6sealed | 217 | Frank, Matt (1491) | Lost 0-2 | -191520 |
| 7sealed | 343 | Berdichevsky, Ellan (1500) | Draw 1-1 | 01520 |
| 8sealed | 401 | Ramirez, Alexander (1609) | Lost 0-2 | -171503 |
| 9sealed | 359 | Wacey, Liam (1471) | Won 2-0 | +181521 |
| top | average opponent: 1522record: 4-2-3 | new rating: 1521 | ||
| Grand Prix Seattle-Tacoma 2015 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 212 | Robinson, Matt (1508) | Won 2-0 | +181518 |
| 2legacy | 154 | Krauskopf, Mike (1379) | Lost 0-2 | -201498 |
| 3legacy | 594 | Mullen, Michael (1500) | Won 2-1 | +181516 |
| 4legacy | 462 | Johnson, Matt (1720) | Lost 1-2 | -151501 |
| 5legacy | 607 | ODonnell, John (1499) | Lost 1-2 | -181483 |
| 6legacy | 635 | Bale, Brandon (1410) | Lost 1-2 | -191464 |
| 7legacy | 539 | Wen, Henry (1461) | Won 2-0 | +181482 |
| 8legacy | 423 | Morgan, Kyle (1479) | Won 2-0 | +181500 |
| 9legacy | 281 | Darlington, Kenny (1534) | Lost 0-2 | -181482 |
| top | average opponent: 1499record: 4-5 | new rating: 1482 | ||