Cheney, Duncan M
Current rating: 1453
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 29 | Pargh, David (1504) | Won 2-0 | +191484 |
| 5sealed | 8 | Lundberg, Jason (1566) | Lost 0-2 | -171467 |
| 6sealed | 89 | Cammilleri, Mike (1536) | Won 2-1 | +201487 |
| 7sealed | 38 | Pierce, Jared (1527) | Lost 1-2 | -181469 |
| 8sealed | 63 | O'Brien, William (1557) | Lost 0-2 | -161453 |
| top | average opponent: 1538record: 2-3 | new rating: 1453 | ||
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 289 | Gardler, Harrison J (1500) | Lost 0-2 | -181482 |
| 2extended | 379 | Overbeek, Daniel (1556) | Lost 0-2 | -161466 |
| 3extended | 392 | Bode, Jonathan (1464) | Won 2-1 | +181484 |
| 4extended | 427 | Boomer, Chris (1464) | Lost 0-2 | -191465 |
| top | average opponent: 1496record: 1-3 | new rating: 1465 | ||
| Grand Prix Montreal 2007 (Time Spiral block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 110 | grenier, frederic (1500) | Lost 0-2 | -181482 |
| 2block | 218 | Zhao, Jian (1484) | Won 2-1 | +181500 |
| 3block | 126 | Alario, Anthony J (1505) | Lost 0-2 | -181482 |
| 4block | 307 | Poulin, Steeve (1482) | Won 2-1 | +181500 |
| 5block | 214 | Pelletier, Antony (1500) | Won 2-0 | +181518 |
| 6block | 133 | Chan, Nicholas (1520) | Lost 0-2 | -181500 |
| 7block | 164 | Allaire, Hugues (1504) | Won 2-1 | +181518 |
| 8block | 110 | Bleuze-Carolan, Christopher (1523) | Lost 0-0 | -181500 |
| top | average opponent: 1502record: 4-4 | new rating: 1500 | ||