Harder, Robert
Current rating: 1416
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 217 | Hawthorne, Bart (1653) | Lost 1-2 | -141451 |
| 2sealed | 447 | Cole, Joshua (1464) | Lost 1-2 | -181433 |
| 3sealed | 711 | Delano, Jesse (1464) | Lost 0-2 | -171416 |
| top | average opponent: 1527record: 0-3 | new rating: 1416 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 333 | Fennell, Jc (1500) | Won 2-1 | +191464 |
| 2modern | 341 | Turner, Michael (1506) | Won 2-0 | +191483 |
| 3modern | 162 | Graham, Sam (1501) | Won 2-1 | +181501 |
| 4modern | 29 | Anderson, Bryan (1428) | Lost 1-2 | -191482 |
| 5modern | 229 | Priver, David (1556) | Lost 0-2 | -171465 |
| top | average opponent: 1498record: 3-2 | new rating: 1465 | ||
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 341 | Marx, Brian (1500) | Lost 1-2 | -181482 |
| 2legacy | 500 | Dilts, Ethan (1488) | Lost 1-2 | -181464 |
| 3legacy | 756 | Crownover, Jason (1462) | Won 2-0 | +181482 |
| 4legacy | 208 | Bennett, James [USA] (1446) | Lost 0-2 | -191463 |
| 5legacy | 695 | Shvachkin, Gabriel (1463) | Lost 1-2 | -181445 |
| top | average opponent: 1472record: 1-4 | new rating: 1445 | ||