Winkworth, Jeff R
Current rating: 1431
Record: 1-5-1
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 342 | Maxwell, Brandon (1500) | Won 2-0 | +191483 |
| 2sealed | 352 | Van Veen, William (1518) | Lost 1-2 | -181465 |
| 3sealed | 536 | Koslik, Ben (1502) | Lost 0-2 | -171448 |
| 4sealed | 595 | Nicholson, Zack J (1508) | Lost 1-2 | -171431 |
| average opponent: 1507record: 1-3 | new rating: 1431 | |||
| Grand Prix Toronto 2006 (DIS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 74 | Morgenstern, Adam C (1500) | Draw 1-1 | 01500 |
| 2sealed | 125 | Baines, David J (1500) | Lost 1-2 | -181482 |
| 3sealed | 182 | Bailie, Scott H (1482) | Lost 1-2 | -181464 |
| average opponent: 1494record: 0-2-1 | new rating: 1464 | |||