Preece, Mark
Current rating: 1449
Record: 2-5
| Grand Prix Los Angeles 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 407 | Nordgren, Bryce (1485) | Lost 0-2 | -181482 |
| 2modern | 568 | Lamberson, Terry (1672) | Lost 1-2 | -151467 |
| 3modern | 708 | Frank, Benjamin (1551) | Lost 0-2 | -161451 |
| 4modern | 710 | Downing, Walter (1447) | Lost 1-2 | -181433 |
| 5modern | 669 | Barnett, Caleb (1427) | Won 2-1 | +181451 |
| 6modern | 562 | Glauster, Roberto (1444) | Lost 1-2 | -191432 |
| 7modern | 476 | Martinez, Jose (1356) | Won 2-0 | +171449 |
| average opponent: 1483record: 2-5 | new rating: 1449 | |||