Dyson, Sam R
Current rating: 1465
Record: 4-6
| Grand Prix Atlanta 2011 (extended) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 23 | Wilkerson, Tyler (1447) | Won 2-1 | +171518 |
| 2extended | 13 | Mayer, David (1561) | Lost 0-2 | -171501 |
| 3extended | 158 | Christensen, Andrew (1499) | Lost 0-2 | -181483 |
| 4extended | 226 | Sukhram, Joel (1481) | Lost 1-2 | -181465 |
| average opponent: 1497record: 1-3 | new rating: 1465 | |||
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 587 | Mercier, Frederic (1519) | Lost 0-2 | -181482 |
| 2sealed | 681 | Rawson, Ken (1528) | Lost 1-2 | -171465 |
| 3sealed | 683 | Leihser, Neal (1464) | Won 2-1 | +181483 |
| 4sealed | 653 | Guy, Michael (1482) | Won 2-1 | +181501 |
| 5sealed | 654 | Reynolds, Nicholas (1526) | Won 2-0 | +191520 |
| 6sealed | 569 | Sammons, Brandon J (1503) | Lost 1-2 | -191501 |
| average opponent: 1504record: 3-3 | new rating: 1501 | |||