Shaffer, Joseph
Current rating: 1531
Record: 9-8
| Grand Prix New Jersey 2017 (std) (AER standard) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 232 | Murphy, Brian (1500) | Won 2-1 | +181520 |
| 2standard | 206 | Ho, Lan (1835) | Lost 1-2 | -121508 |
| 3standard | 544 | Shvachkin, Gabriel (1512) | Won 2-1 | +181526 |
| 4standard | 271 | Ward, Daniel (1916) | Won 2-0 | +251551 |
| 5standard | 172 | Bishop, Jesse (1514) | Lost 1-2 | -191532 |
| 6standard | 350 | Masters, Chase (1600) | Won 2-0 | +191551 |
| 7standard | 360 | Schober, Gavin (1463) | Lost 1-2 | -191532 |
| 8standard | 426 | Caruso, Michael (1444) | Won 2-0 | +161548 |
| 9standard | 226 | Schaaf, Chris (1574) | Lost 1-2 | -171531 |
| average opponent: 1595record: 5-4 | new rating: 1531 | |||
| Grand Prix Providence 2016 (KLD standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 329 | Conners, William (1500) | Won 2-0 | +181518 |
| 2standard | 125 | LaChance, Alex (1499) | Lost 0-2 | -181500 |
| 3standard | 274 | Stringer, Joshua (1529) | Lost 0-2 | -181482 |
| 4standard | 454 | Sarahs, Sean (1481) | Won 2-1 | +181500 |
| 5standard | 352 | Spencer, David (1449) | Won 2-1 | +171517 |
| 6standard | 208 | Ouimette, Justin (1496) | Lost 0-2 | -181499 |
| 7standard | 333 | Tucker, Benjamin (1540) | Won 2-0 | +191518 |
| 8standard | 212 | Wallace, Adam (1673) | Lost 1-2 | -161502 |
| average opponent: 1521record: 4-4 | new rating: 1502 | |||