Johnson, Robert F
Current rating: 1462
Record: 3-5
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 80 | Alonso, Nicholas (1500) | Lost 1-2 | -181482 |
| 2extended | 268 | Senneway, Bill (1465) | Lost 0-2 | -181464 |
| 3extended | 396 | Garabedian, Dylan (1464) | Won 2-0 | +181482 |
| 4extended | 329 | Pettengill, Morgan (1481) | Lost 0-2 | -181464 |
| 5extended | 395 | LaIacona, Chris J (1463) | Won 2-1 | +181482 |
| 6extended | 311 | Aguirre, Andrew (1456) | Won 2-0 | +171499 |
| 7extended | 237 | Dykes, Matthew (1488) | Lost 1-2 | -181481 |
| 8extended | 201 | Clark, Dan (1447) | Lost 1-2 | -191462 |
| average opponent: 1470record: 3-5 | new rating: 1462 | |||