Mossberg, Sam
Current rating: 1547
Record: 5-3
| Grand Prix Portland 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 55 | Hildebrandt, Jud (1500) | Won 2-0 | +181518 |
| 2modern | 191 | Betschart, Brad (1571) | Won 2-1 | +191537 |
| 3modern | 4 | Herbers, Adam (1754) | Won 2-0 | +221559 |
| 4modern | 157 | Campbell, Cole (1558) | Lost 0-2 | -181541 |
| 5modern | 236 | Moesser, Nicholas (1640) | Lost 1-2 | -161525 |
| 6modern | 270 | O'Dell, Darrin (1483) | Won 2-1 | +171542 |
| 7modern | 261 | Solis, Steven (1847) | Lost 1-2 | -131529 |
| 8modern | 286 | Gardner-Durbin, Brook (1530) | Won 2-0 | +181547 |
| average opponent: 1610record: 5-3 | new rating: 1547 | |||