Schaf, Joseph
Current rating: 1476
| Grand Prix New Jersey 2018 (GRN standard) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 26 | Zobel, John (1559) | Won 2-1 | +191488 |
| 2standard | 188 | Hu, Yunyi (1513) | Lost 1-2 | -171471 |
| 3standard | 392 | Loelius, Erin (1499) | Lost 0-2 | -181453 |
| 4standard | 445 | Shaffer, Joe (1588) | Won 2-0 | +211474 |
| 5standard | 370 | Johnson, Case (1744) | Won 2-0 | +231497 |
| 6standard | 341 | Batchelder, James (1378) | Lost 1-2 | -211476 |
| top | average opponent: 1547record: 3-3 | new rating: 1476 | ||
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 324 | Sabo, Sean (1549) | Lost 0-2 | -171487 |
| 2sealed | 414 | Casullo, Daniel (1481) | Won 2-1 | +181505 |
| 3sealed | 540 | Thomas, Chris (1502) | Lost 1-2 | -181487 |
| 4sealed | 645 | Artis, Greyson (1487) | Lost 1-2 | -181469 |
| top | average opponent: 1505record: 1-3 | new rating: 1469 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 781 | Waldorf, Frank (1446) | Lost 0-2 | -191481 |
| 2legacy | 1073 | Bufardeci, Mike (1465) | Won 2-1 | +181499 |
| 3legacy | 1127 | Uchen, Matan (1501) | Lost 0-2 | -181481 |
| 4legacy | 1195 | Simon, Jason (1510) | Won 2-0 | +181499 |
| 5legacy | 879 | Lin, Alex (1615) | Won 2-1 | +201519 |
| 6legacy | 899 | Konig, Marc (1668) | Lost 0-2 | -151504 |
| top | average opponent: 1534record: 3-3 | new rating: 1504 | ||