Zylstra, Mark
Current rating: 1466
Record: 1-3
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 568 | Kanon, Kyle (1576) | Lost 0-2 | -171483 |
| 2sealed | 515 | Anderson, Phil (1520) | Won 2-0 | +191502 |
| 3sealed | 547 | Garner, Shawn (1500) | Lost 0-2 | -181484 |
| 4sealed | 575 | Elliot, Brandon (1481) | Lost 0-2 | -181466 |
| average opponent: 1519record: 1-3 | new rating: 1466 | |||