Mark, William
Current rating: 1463
Record: 5-7
| Grand Prix Toronto 2019 (modern) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 314 | Chang, Ryan (1464) | Lost 0-2 | -181481 |
| 2modern | 382 | Baran, Kyle (1486) | Won 2-1 | +181499 |
| 3modern | 488 | Simon, Tyler (1516) | Lost 1-2 | -181481 |
| 4modern | 452 | Macdonald, Geordie (1481) | Lost 1-2 | -181463 |
| average opponent: 1487record: 1-3 | new rating: 1463 | |||
| Grand Prix Toronto 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 311 | Jackman, Matthew (1357) | Lost 0-2 | -211479 |
| 2modern | 548 | Pisarski, Matt (1514) | Lost 0-2 | -171462 |
| 3modern | 697 | Rydzik, Ken (1482) | Won 2-0 | +181480 |
| 4modern | 686 | Nelson, Kade (1432) | Won 2-0 | +181498 |
| 5modern | 591 | Chin, Alex (1503) | Lost 1-2 | -181480 |
| 6modern | 561 | Samborski, Michael (1485) | Lost 1-2 | -181462 |
| 7modern | 544 | Gottlieb, Justin (1552) | Won 2-0 | +191481 |
| 8modern | 437 | Emerson, Steven (1485) | Won 2-1 | +181499 |
| average opponent: 1476record: 4-4 | new rating: 1499 | |||