Polk, Jason
Current rating: 1460
Record: 5-8
| Grand Prix Brisbane 2004 (COK limited) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 27 | Gardner, Brint (1535) | Won 2-0 | +191486 |
| 4sealed | 11 | Ibamoto, Masami (1865) | Lost 0-2 | -121474 |
| 5sealed | 56 | Crewe, David (1462) | Lost 0-2 | -181456 |
| 6sealed | 73 | Stasiuk, Luke (1518) | Won 2-0 | +191475 |
| 7sealed | 57 | Royle, Ian (1485) | Won 2-0 | +181493 |
| 8rochester | 1 | Brown-Santirso, Julian (1640) | Lost 0-2 | -151478 |
| 9rochester | 7 | Grove, Kevin (1517) | Lost 1-2 | -171461 |
| 10rochester | 4 | Hamilton, Berren (1450) | Lost 0-2 | -181443 |
| 11rochester | 23 | Restel, Sven (1419) | Won 2-1 | +171460 |
| average opponent: 1543record: 4-5 | new rating: 1460 | |||
| Grand Prix Brisbane 2001 (ODY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 24 | Nadebaum, Rob (1496) | Lost 1-2 | -181482 |
| 4sealed | 41 | Khoo, Wei Ren (1557) | Lost 1-2 | -171465 |
| 5sealed | 68 | Barlow, Scott (1482) | Won 2-1 | +191484 |
| 6sealed | 51 | Otton, Kieren (1536) | Lost 1-2 | -171467 |
| average opponent: 1518record: 1-3 | new rating: 1467 | |||