Maccallum, Duncan
Current rating: 1464
Record: 2-4
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 6 | Choi, Clive (1500) | Won 2-0 | +181518 |
| 2sealed | 136 | Tsuji, Christopher (1500) | Lost 0-2 | -181500 |
| 3sealed | 220 | Grinnell, Joshua (1524) | Lost 0-2 | -181482 |
| 4sealed | 263 | Kourtoukov, Boris (1484) | Won 2-1 | +181500 |
| 5sealed | 175 | Tengtirasakul, Saran (1500) | Lost 0-2 | -181482 |
| 6sealed | 195 | Lawrence, Chris (1484) | Lost 0-2 | -181464 |
| average opponent: 1499record: 2-4 | new rating: 1464 | |||