Petersen, Colin [AUS]
Current rating: 1559
Record: 13-10-1
| Grand Prix Brisbane 2004 (COK limited) | starting rating: 1553 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 13 | Duff, Stuart (1481) | Won 2-0 | +171570 |
| 5sealed | 7 | Armstrong, Matthew (1499) | Won 2-0 | +171587 |
| 6sealed | 5 | West, Benjamin (1517) | Won 2-0 | +161603 |
| 7sealed | 1 | Hay, Tom (1715) | Lost 0-2 | -161587 |
| 8rochester | 2 | Jiang, Shun (1825) | Won 2-1 | +231610 |
| 9rochester | 24 | Zhang, James (1650) | Lost 0-2 | -181592 |
| 10rochester | 25 | Chang, Enchante Shawn (1654) | Lost 1-2 | -171575 |
| 11rochester | 17 | Gordon, Andrew D (1726) | Lost 1-2 | -151560 |
| 12rochester | 16 | Kelly, John-Paul (1510) | Lost 0-2 | -191541 |
| 13rochester | 10 | Pham, Hieu (1499) | Won 2-0 | +181559 |
| average opponent: 1608record: 5-5 | new rating: 1559 | |||
| Grand Prix Sydney 2003 (MRD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 54 | O'Bree, Gary (1500) | Lost 1-2 | -181482 |
| 2sealed | 83 | Lim, Keith (1464) | Won 2-1 | +181500 |
| 3sealed | 62 | Siu, Kwong (1485) | Won 2-0 | +171517 |
| 4sealed | 56 | Stuart, Rob (1502) | Won 2-1 | +181535 |
| 5sealed | 58 | Karp, Hugh (1468) | Won 2-0 | +171552 |
| 6sealed | 24 | Barlow, Russell (1577) | Lost 1-2 | -181534 |
| 7sealed | 48 | White, James T (1611) | Won 2-0 | +201554 |
| 8sealed | 40 | Neeman, Jeremy (1503) | Won 2-1 | +171571 |
| 9rochester | 16 | Schafer, Ross (1572) | Lost 1-2 | -181553 |
| 10rochester | 15 | Williams, Christopher [AUS] (1559) | Won 2-1 | +181571 |
| 11rochester | 18 | Zhang, James (1527) | Lost 0-2 | -191552 |
| 12rochester | 23 | West, Justin T (1570) | Lost 0-2 | -181534 |
| 13rochester | 8 | Aitchison, Christopher (1546) | Draw 1-1 | +11535 |
| 14rochester | 15 | Goodall, Matthew (1562) | Won 2-1 | +181553 |
| average opponent: 1532record: 8-5-1 | new rating: 1553 | |||