Gemmill, Benjamin
Current rating: 1504
Record: 8-7
| Grand Prix Philadelphia 2014 (BNG limited) | starting rating: 1570 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 526 | Doshi, Vishvas (1472) | Lost 1-2 | -201550 |
| 2sealed | 596 | Hitchcock, Ian (1467) | Lost 0-2 | -191531 |
| 3sealed | 845 | Orye, Kenny (1465) | Won 2-1 | +161547 |
| 4sealed | 627 | English, Will (1479) | Won 2-0 | +171564 |
| 5sealed | 625 | Cortez, Yvonne (1470) | Lost 0-2 | -191545 |
| 6sealed | 516 | Cudia, Ben (1364) | Lost 0-2 | -221523 |
| 7sealed | 474 | Donaldson, Mark (1434) | Lost 0-2 | -191504 |
| average opponent: 1450record: 2-5 | new rating: 1504 | |||
| Grand Prix Philadelphia 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 107 | Rubens, Adam (1500) | Won 0-0 | +181518 |
| 2extended | 73 | Knepper, Bryan (1518) | Won 0-0 | +181536 |
| 3extended | 45 | Guy, Marcus (1536) | Won 0-0 | +181554 |
| 4extended | 33 | Sproul, Curtis (1541) | Lost 0-0 | -181536 |
| 5extended | 52 | Clark, Zac (1536) | Won 0-0 | +181554 |
| 6extended | 47 | Van Zander, Michael (1524) | Lost 0-0 | -191535 |
| 7extended | 56 | Board, Kenneth (1534) | Won 0-0 | +181553 |
| 8extended | 49 | Hanson, Doug (1485) | Won 0-0 | +171570 |
| average opponent: 1522record: 6-2 | new rating: 1570 | |||