Tatham, Matthew J
Current rating: 1485
Record: 5-6
| Grand Prix Atlanta 2014 (JOU limited) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 327 | Carrin, Talon (1535) | Won 2-1 | +191517 |
| 2sealed | 298 | Meola, Nicholas (1518) | Lost 1-2 | -181499 |
| 3sealed | 503 | Malka, Sol (1755) | Lost 1-2 | -141485 |
| 4sealed | 693 | Oladipo, Kenny (1481) | Won 2-1 | +181503 |
| 5sealed | 593 | Brost, Jon (1505) | Lost 0-2 | -181485 |
| average opponent: 1559record: 2-3 | new rating: 1485 | |||
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 208 | Lovell, Adam (1500) | Won 2-1 | +181518 |
| 2sealed | 169 | Kovach, Victor R (1518) | Won 2-1 | +181536 |
| 3sealed | 76 | Tam, Wai (1296) | Won 2-1 | +141550 |
| 4sealed | 94 | Kuehl, Christopher (1681) | Lost 1-2 | -161534 |
| 5sealed | 118 | Chasan, Ze'Eva (1522) | Lost 1-2 | -181516 |
| 6sealed | 150 | Webb, Michael (1519) | Lost 1-2 | -181498 |
| average opponent: 1506record: 3-3 | new rating: 1498 | |||