Havill, Jonathan D
Current rating: 1430
Record: 3-7
| Grand Prix Toronto 2012 (modern) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 203 | Luong, Philip (1517) | Lost 1-2 | -171446 |
| 2modern | 304 | Farara, Kasey (1482) | Lost 1-2 | -171429 |
| 3modern | 386 | Jeffrey, Kevin (1463) | Lost 1-2 | -181411 |
| 4modern | 474 | Coulombe, Andrew (1445) | Won 2-1 | +191430 |
| 5modern | 435 | Hamilton, Ryan (1453) | Won 2-0 | +181448 |
| 6modern | 360 | St. Pierre, Glen E (1414) | Lost 1-2 | -181430 |
| average opponent: 1462record: 2-4 | new rating: 1430 | |||
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 52 | Chan, Charlie (1500) | Lost 0-2 | -181482 |
| 2sealed | 188 | Burachynsky, Ivan (1448) | Lost 0-2 | -191463 |
| 3sealed | 283 | Brazeau, Mathieu (1446) | Lost 0-2 | -181445 |
| 4sealed | 291 | Berardi, Kevin J (1446) | Won 2-1 | +181463 |
| average opponent: 1460record: 1-3 | new rating: 1463 | |||