O'Bree, Gary
Current rating: 1503
| Grand Prix Brisbane 2019 (ELD standard) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 1 | Kulikov, Mikhail (1402) | Lost 1-2 | -191446 |
| 2standard | 132 | Jelleff, James (1358) | Won 2-0 | +161462 |
| 3standard | 171 | Taubman, Samuel (1509) | Won 2-0 | +191481 |
| 4standard | 77 | Ackling, Thomas (1517) | Won 2-1 | +191500 |
| 5standard | 35 | Brunton, David (1624) | Lost 0-2 | -161484 |
| 6standard | 87 | Hampstead, Sean (1498) | Won 2-0 | +181502 |
| 7standard | 77 | Frewin, Dylan (1534) | Won 2-1 | +191521 |
| 8standard | 21 | Barker, Thomas (1535) | Lost 0-2 | -181503 |
| top | average opponent: 1497record: 5-3 | new rating: 1503 | ||
| Grand Prix Sydney 2006 (TSP limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 20 | Anderson, Charles [AUS] (1500) | Won 2-0 | +181499 |
| 2sealed | 14 | Montgomery, Stephen (1517) | Won 2-1 | +181517 |
| 3sealed | 18 | Pirie, Andrew (1582) | Lost 0-2 | -161501 |
| 4sealed | 20 | Glanville, Hugh (1492) | Lost 1-2 | -191482 |
| 5sealed | 66 | Guan, Boney (1501) | Lost 0-2 | -171465 |
| top | average opponent: 1518record: 2-3 | new rating: 1465 | ||
| Grand Prix Sydney 2003 (MRD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 54 | Petersen, Colin [AUS] (1500) | Won 2-1 | +181518 |
| 2sealed | 35 | Pirie, James (1551) | Draw 1-1 | +11519 |
| 3sealed | 46 | Piechnick, Daniel (1519) | Draw 1-1 | 01519 |
| 4sealed | 90 | Light, Jens (1447) | Lost 0-2 | -201499 |
| 5sealed | 107 | Norton, Mark (1466) | Lost 1-2 | -181481 |
| top | average opponent: 1497record: 1-2-2 | new rating: 1481 | ||