Orton, Jonathan
Current rating: 1533
Record: 6-4
| Grand Prix Nottingham 2005 (RAV limited) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 76 | Corbin, Roland (1463) | Lost 0-2 | -191517 |
| 2sealed | 198 | Bradford, Wayne (1482) | Won 1-0 | +171534 |
| 3sealed | 161 | Kiourtsoglou, Dimitris (1508) | Lost 0-2 | -181516 |
| 4sealed | 229 | Harrop, Jonathan (1482) | Won 2-0 | +171533 |
| average opponent: 1484record: 2-2 | new rating: 1533 | |||
| Grand Prix Birmingham 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 97 | Brown, Christopher [ENG] (1500) | Won 2-0 | +181518 |
| 2sealed | 113 | Hardisty, Edward (1518) | Lost 1-2 | -181500 |
| 3sealed | 165 | Arrowsmith, Martin (1499) | Won 2-0 | +181518 |
| 4sealed | 155 | Colbourne, Alex (1517) | Won 2-1 | +181536 |
| 5sealed | 111 | Wiedenbein, Holger (1497) | Lost 0-2 | -191517 |
| 6sealed | 137 | Ardoino, Marco (1555) | Won 2-0 | +191536 |
| average opponent: 1514record: 4-2 | new rating: 1536 | |||