Grippa, Robert
Current rating: 1484
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 58 | Germain, Brandon (1481) | Won 2-0 | +181503 |
| 2sealed | 74 | Woods, James (1520) | Won 2-0 | +181521 |
| 3sealed | 71 | Genkins, Daniel (1500) | Lost 0-2 | -181503 |
| 4sealed | 148 | Solorio, Bob P (1518) | Won 2-1 | +181521 |
| 5sealed | 59 | Seitz, Scott (1535) | Lost 0-2 | -181503 |
| 6sealed | 109 | Yandell, Chris (1467) | Lost 1-2 | -191484 |
| top | average opponent: 1503record: 3-3 | new rating: 1484 | ||
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 216 | Chalmers, Dwayne (1500) | Won 2-1 | +191500 |
| 2extended | 38 | Fanjoy, Ben (1555) | Lost 0-2 | -171483 |
| 3extended | 197 | Cook, Matt (1500) | Won 2-0 | +181501 |
| 4extended | 210 | Jones, Trent (1600) | Lost 1-2 | -161485 |
| top | average opponent: 1539record: 2-2 | new rating: 1485 | ||
| Grand Prix Montreal 2007 (Time Spiral block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 6 | Potvin, Matt (1461) | Won 2-0 | +171517 |
| 2block | 38 | Sparks, Cayle R (1508) | Lost 0-2 | -181499 |
| 3block | 167 | Biron, Pierre-Alexandre (1503) | Lost 1-2 | -181481 |
| top | average opponent: 1491record: 1-2 | new rating: 1481 | ||