Weisz, Sam
Current rating: 1553
Record: 6-3
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 407 | Moser, Amanda (1500) | Won 2-0 | +181518 |
| 2sealed | 207 | Aitchison, Michael (1452) | Lost 0-2 | -191499 |
| 3sealed | 253 | Medley, William (1500) | Won 2-0 | +181517 |
| 4sealed | 233 | Leyba, Tyson (1500) | Won 2-1 | +181535 |
| 5sealed | 183 | Christensen, John m (1522) | Won 2-1 | +171552 |
| 6sealed | 127 | Edwards, Terry (1554) | Won 2-0 | +181570 |
| 7sealed | 63 | Sprunger, Brock (1573) | Lost 1-2 | -181552 |
| 8sealed | 132 | Switzer, Doug (1538) | Won 2-0 | +181570 |
| 9sealed | 49 | Angulo, Enrique (1628) | Lost 0-2 | -171553 |
| average opponent: 1530record: 6-3 | new rating: 1553 | |||