Preece, Jasper
Current rating: 1476
Record: 12-14
| Grand Prix Bangkok 2019 (ELD limited) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 12 | Hart, Jacob (1909) | Won 2-1 | +261491 |
| 2sealed | 19 | Lee, Swee Tian (1555) | Lost 0-2 | -171474 |
| 3sealed | 228 | Suryadhi, Ebnu (1523) | Won 2-0 | +191493 |
| 4sealed | 207 | Ho, Tsz Kin (1530) | Lost 1-2 | -171476 |
| top | average opponent: 1629record: 2-2 | new rating: 1476 | ||
| Grand Prix Mexico City 2016 (OGW limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 281 | Oropeza Venegas, Miguel (1501) | Won 2-1 | +181517 |
| 2sealed | 12 | Calva, Julio (1640) | Lost 0-2 | -161501 |
| 3sealed | 255 | Prehu, Christophe (1497) | Lost 1-2 | -181483 |
| 4sealed | 320 | Garcia Quintero, Jose (1481) | Lost 1-2 | -181465 |
| top | average opponent: 1530record: 1-3 | new rating: 1465 | ||
| Grand Prix Kuala Lumpur 2014 (THS limited) | starting rating: 1515 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 23 | Kok Ping Cheong, Shaun (1500) | Won 2-0 | +181533 |
| 2sealed | 80 | Lee, Wen Yi Julian (1658) | Lost 0-2 | -161517 |
| 3sealed | 313 | Rahman, Abddul (1500) | Won 2-0 | +181535 |
| 4sealed | 172 | Ang, Charlie (1462) | Lost 1-2 | -191516 |
| 5sealed | 275 | Tan, Ian Keng Huat (1598) | Lost 1-2 | -171499 |
| top | average opponent: 1544record: 2-3 | new rating: 1499 | ||
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 628 | Hauer, Johannes (1478) | Lost 0-1 | -181482 |
| 2sealed | 720 | Pavel, Moraves (1466) | Won 2-0 | +171499 |
| 3sealed | 654 | Rehounek, Lubos (1501) | Won 2-0 | +181517 |
| 4sealed | 658 | Bakhtiarov, Alexandre (1520) | Lost 1-2 | -181499 |
| 5sealed | 664 | Nedbal, Marek (1463) | Won 2-1 | +181517 |
| 6sealed | 620 | Irrgang, Tobias (1465) | Won 2-0 | +171534 |
| 7sealed | 610 | Amans, Nicolas (1500) | Lost 1-2 | -191515 |
| top | average opponent: 1485record: 4-3 | new rating: 1515 | ||
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 37 | Dinkin, Raymond (1500) | Won 2-1 | +181518 |
| 2sealed | 80 | Hogg, Daniel W (1518) | Lost 0-2 | -181500 |
| 3sealed | 146 | Leviton, Steven (1500) | Won 2-0 | +181518 |
| 4sealed | 194 | Sheikh, Abdullahi A (1519) | Lost 0-2 | -181500 |
| 5sealed | 156 | Elliott, Stephan M (1500) | Lost 0-2 | -181482 |
| 6sealed | 187 | Abramson, Erin (1481) | Won 2-0 | +181500 |
| top | average opponent: 1503record: 3-3 | new rating: 1500 | ||