Shaffer, Joe
Current rating: 1523
Record: 29-29
| Grand Prix New Jersey 2020 (THB limited) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 115 | Reagan, Edward (1513) | Won 2-0 | +181537 |
| 3sealed | 263 | Behrens, Joseph (1667) | Won 2-1 | +211558 |
| 4sealed | 73 | Conklin, Thomas (1544) | Lost 1-2 | -191539 |
| 5sealed | 249 | Costello, Alexander (1557) | Lost 1-2 | -171522 |
| 6sealed | 263 | O'Neill, Eric (1485) | Won 2-0 | +171539 |
| 7sealed | 205 | Reid, Chris (1503) | Won 2-1 | +171556 |
| 8sealed | 101 | Murray, Michael (1417) | Won 2-0 | +161572 |
| 9sealed | 96 | Babcock, Grant (1655) | Lost 0-2 | -171555 |
| 10draft | 30 | King, Kevin (1680) | Won 2-0 | +211576 |
| 11draft | 101 | Gauker, Dylan (1713) | Lost 0-2 | -161560 |
| 12draft | 81 | Richey, Henry (1532) | Lost 1-2 | -181542 |
| 13draft | 30 | Bartlett, Colin (1519) | Lost 1-2 | -191523 |
| top | average opponent: 1565record: 6-6 | new rating: 1523 | ||
| Grand Prix Los Angeles 2019 (modern) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 75 | Eales, Andrew (1721) | Lost 0-2 | -141496 |
| 3modern | 472 | Walker, Jacob (1554) | Won 2-0 | +191515 |
| 4modern | 438 | Parseghian, Carlo (1517) | Won 2-0 | +181533 |
| 5modern | 126 | Chhauy, Chamrong (1632) | Lost 1-2 | -161517 |
| 6modern | 320 | Young, Bryant (1608) | Lost 1-2 | -161501 |
| 7modern | 398 | Lysenko, Jesse (1544) | Won 2-1 | +181519 |
| top | average opponent: 1596record: 3-3 | new rating: 1519 | ||
| Grand Prix New Jersey 2019 (RNA limited) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 271 | Rhinehart, Joshua (1458) | Lost 0-2 | -191508 |
| 3sealed | 537 | Neveu, Pierre Antoine (1702) | Won 2-1 | +211529 |
| 4sealed | 319 | Eustace, Timothy (1473) | Lost 1-2 | -191510 |
| 5sealed | 440 | Devault, Nancy (1510) | Won 2-1 | +181528 |
| 6sealed | 418 | Mikus, Keith (1524) | Lost 0-2 | -181510 |
| top | average opponent: 1534record: 2-3 | new rating: 1510 | ||
| Grand Prix New Jersey 2018 (GRN standard) | starting rating: 1625 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 199 | St-Julien, Christen (1652) | Lost 0-2 | -171608 |
| 3standard | 398 | Rusconi, Pablo (1495) | Lost 0-2 | -201588 |
| 4standard | 445 | Schaf, Joseph (1453) | Lost 0-2 | -211567 |
| 5standard | 526 | Derro, Gavin (1434) | Lost 1-2 | -201547 |
| 6standard | 469 | Wollensak, Cameron (1449) | Lost 1-2 | -201527 |
| top | average opponent: 1497record: 0-5 | new rating: 1527 | ||
| Grand Prix New Jersey 2017 (lim) (XLN limited) | starting rating: 1570 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 161 | Blain, Bret (1473) | Won 2-1 | +171587 |
| 2sealed | 143 | Chen, Jimmy (1662) | Lost 0-2 | -171570 |
| 3sealed | 344 | Rood, David (1818) | Lost 0-2 | -141556 |
| 4sealed | 475 | Drake, Robert (1461) | Won 2-1 | +171573 |
| 5sealed | 423 | Del Rosario-Bell, Cosme (1503) | Lost 1-2 | -201553 |
| 6sealed | 370 | Zung, Stacy (1421) | Won 2-0 | +161569 |
| 7sealed | 303 | Cuellar, Christopher (1463) | Won 2-0 | +161585 |
| 8sealed | 201 | Dion, Marc-Antoine (1737) | Won 2-0 | +211606 |
| 9sealed | 190 | Whiteside, Edward (1633) | Won 2-1 | +181624 |
| 10draft | 41 | Schenker, Austin (1596) | Won 2-1 | +181642 |
| 11draft | 40 | Kirkpatrick, Greg (1575) | Won 2-0 | +171659 |
| 12draft | 39 | Belateche, Zachary (1577) | Won 2-0 | +161675 |
| 13draft | 113 | Feldman, Joshua (1629) | Lost 1-2 | -191656 |
| 14draft | 134 | Salvador Arnal, Guillem (1750) | Lost 1-2 | -161640 |
| 15draft | 101 | Tomajko, Oliver (1825) | Lost 1-2 | -151625 |
| top | average opponent: 1608record: 9-6 | new rating: 1625 | ||
| Grand Prix Washington DC 2017 (HOU standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 77 | Hazen, Jim (1547) | Lost 1-2 | -171483 |
| 2standard | 501 | Thorpe, Colin (1485) | Won 2-1 | +181501 |
| 3standard | 548 | Parsons, Aaron (1579) | Won 2-0 | +191520 |
| 4standard | 461 | Russell, Griffin (1492) | Won 2-0 | +181538 |
| 5standard | 115 | Brown, Ian (1537) | Won 2-1 | +181556 |
| 6standard | 165 | Pagan, Alberto (1595) | Lost 1-2 | -181538 |
| 7standard | 288 | Milliken, Joshua (1603) | Won 2-1 | +201558 |
| 8standard | 218 | Bowman, Jeremy (1721) | Won 2-0 | +211579 |
| 9standard | 99 | Su, Bo (1849) | Lost 0-2 | -141565 |
| 10standard | 132 | Jones, David (1568) | Won 2-0 | +181583 |
| 11standard | 163 | Gibson, Matthew (1499) | Won 2-1 | +171600 |
| 12standard | 75 | Ford, Jay (1607) | Won 2-0 | +181618 |
| 13standard | 28 | Kiefer, Quinn (1623) | Lost 1-2 | -181600 |
| 14standard | 94 | Nikolich, Benjamin (1934) | Lost 1-2 | -121588 |
| 15standard | 114 | Wakefield, Bryan (1604) | Lost 1-2 | -181570 |
| top | average opponent: 1616record: 9-6 | new rating: 1570 | ||