Heathershaw, Mark
Current rating: 1508
Record: 3-3
| Grand Prix Portland 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 248 | Rhodes, Ryan (1500) | Won 2-1 | +181518 |
| 2modern | 308 | Roos, Tobias (1535) | Won 2-0 | +181536 |
| 3modern | 148 | Seaman, Patric (1492) | Won 2-0 | +181554 |
| 4modern | 52 | Wong, Charles (1950) | Lost 1-2 | -121542 |
| 5modern | 125 | Herod, Jim (1521) | Lost 1-2 | -181524 |
| 6modern | 417 | Fairbanks, Robert (1647) | Lost 1-2 | -161508 |
| average opponent: 1607record: 3-3 | new rating: 1508 | |||