Schaffer, Brett
Current rating: 1554
Record: 7-4-2
| Grand Prix Cleveland 2019 (RNA limited) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 198 | Byers, Dylan (1500) | Draw 1-1 | 01521 |
| 2sealed | 249 | Maurer, Ian (1447) | Draw 1-1 | -11520 |
| 3sealed | 493 | Petros, Ellessar (1484) | Won 2-1 | +171537 |
| 4sealed | 416 | Blose, David (1517) | Won 2-1 | +181555 |
| 5sealed | 277 | Rastatter, Max (1538) | Won 2-0 | +171572 |
| 6sealed | 182 | Ludwigson, Matthew (1578) | Lost 1-2 | -181554 |
| average opponent: 1511record: 3-1-2 | new rating: 1554 | |||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 838 | Fralick, Nick (1500) | Won 2-0 | +181518 |
| 2standard | 703 | Labny, Ross (1525) | Won 2-1 | +181536 |
| 3standard | 664 | Sauer, Scott R (1487) | Lost 1-2 | -191517 |
| 4standard | 744 | Smith, Adam (1527) | Lost 1-2 | -181499 |
| 5standard | 913 | Xiang, Jun (1500) | Won 2-0 | +181517 |
| 6standard | 834 | Cooper, Ryan (1553) | Won 2-0 | +191536 |
| 7standard | 763 | Landale, Tim (1719) | Lost 0-2 | -151521 |
| average opponent: 1544record: 4-3 | new rating: 1521 | |||