Chang, Richard
Current rating: 1472
Record: 12-14
| Grand Prix Toronto 2017 (HOU limited) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 449 | Pasin, Stefano (1534) | Won 2-1 | +191529 |
| 2sealed | 301 | Grewal, Kabir (1498) | Lost 1-2 | -191510 |
| 3sealed | 407 | Hain, Tim (1465) | Won 2-1 | +171527 |
| 4sealed | 369 | Flett, Evan (1492) | Lost 0-2 | -181509 |
| 5sealed | 475 | Scott, Mackenzie (1510) | Lost 0-2 | -181491 |
| 6sealed | 457 | Jackson, Thomas (1441) | Lost 0-2 | -191472 |
| top | average opponent: 1490record: 2-4 | new rating: 1472 | ||
| Grand Prix Montreal 2015 (DTK limited) | starting rating: 1532 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 58 | Senneville, Raphael (1500) | Lost 1-2 | -191513 |
| 2sealed | 406 | Cantin, Lawrence (1463) | Won 2-0 | +171530 |
| 3sealed | 432 | Akow, Sacha (1429) | Lost 1-2 | -201510 |
| top | average opponent: 1464record: 1-2 | new rating: 1510 | ||
| Grand Prix Toronto 2013 (THS limited) | starting rating: 1530 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 477 | Kerby, Sebastien (1500) | Won 2-0 | +171547 |
| 2sealed | 326 | Berlingieri, Anthony (1851) | Lost 1-2 | -131534 |
| 3sealed | 345 | Bremmer, Johnny (1500) | Won 2-0 | +181552 |
| 4sealed | 462 | Adam-Boucher, Maxime (1504) | Won 2-1 | +171569 |
| 5sealed | 338 | Gibbons, Mark (1545) | Lost 1-2 | -181551 |
| 6sealed | 433 | Day, Mark (1498) | Lost 0-2 | -191532 |
| top | average opponent: 1566record: 3-3 | new rating: 1532 | ||
| Grand Prix Montreal 2011 (M12 limited) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 165 | Donst, Aaron (1500) | Won 2-0 | +181502 |
| 2sealed | 61 | Jiang, Jay (1650) | Lost 0-2 | -151487 |
| 3sealed | 163 | Beverley, Robert (1663) | Lost 1-2 | -151472 |
| 4sealed | 187 | Rafih, Joddat (1508) | Won 2-1 | +191491 |
| 5sealed | 159 | Morissette, Hugo (1500) | Won 2-0 | +181509 |
| 6sealed | 94 | Hartman, Dan (1489) | Won 2-0 | +171526 |
| 7sealed | 106 | Perrin, Nicholas (1539) | Won 2-0 | +191545 |
| 8sealed | 29 | Spinner, Seth (1709) | Lost 0-2 | -151530 |
| top | average opponent: 1570record: 5-3 | new rating: 1530 | ||
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 99 | Damore, Mike (1500) | Lost 1-2 | -181482 |
| 2sealed | 191 | Cheng, Nicholas (1482) | Won 2-1 | +181500 |
| 3sealed | 231 | Nguyen, Paul (1600) | Lost 0-2 | -161484 |
| top | average opponent: 1527record: 1-2 | new rating: 1484 | ||