Mandell, Joshua
Current rating: 1401
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1364 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 589 | Cohen, Brett (1545) | Won 2-1 | +211385 |
| 2sealed | 587 | Gregersen, Ryan (1615) | Won 2-1 | +221407 |
| 3sealed | 194 | Tracy, Zachery (1521) | Lost 0-2 | -161391 |
| 4sealed | 267 | Arndt, Adam (1593) | Lost 0-0 | -141377 |
| 5sealed | 320 | Jupson, John (1499) | Won 2-0 | +201397 |
| 6sealed | 189 | Jackson, Adam (1518) | Won 2-1 | +201417 |
| 7sealed | 140 | Shockley, Ronald (1531) | Lost 0-2 | -161401 |
| top | average opponent: 1546record: 4-3 | new rating: 1401 | ||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 216 | Bregoli, Mike (1637) | Lost 0-2 | -151413 |
| 2sealed | 573 | Kingsbury, Lyle (1420) | Won 2-1 | +181431 |
| 3sealed | 351 | Bushway, Lauren (1500) | Lost 1-2 | -161415 |
| 4sealed | 643 | Lennon, Trent (1481) | Lost 1-2 | -171398 |
| 5sealed | 686 | Celentano, Andrew (1464) | Lost 0-2 | -171381 |
| 6sealed | 614 | Pelrine, Josh (1428) | Lost 0-2 | -171364 |
| top | average opponent: 1488record: 1-5 | new rating: 1364 | ||
| Grand Prix Baltimore 2012 (DKA standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 190 | Barrasso, Carmen (1490) | Lost 0-2 | -181482 |
| 2standard | 538 | Siena, Edward (1482) | Lost 1-2 | -181464 |
| 3standard | 627 | Capp, Spencer E (1464) | Lost 0-2 | -181446 |
| 4standard | 730 | Dlugas, Tim (1430) | Won 1-0 | +181464 |
| 5standard | 649 | sepulveda, edgar F (1463) | Lost 1-2 | -181446 |
| 6standard | 572 | Hall, Elizabeth (1445) | Lost 0-2 | -181428 |
| top | average opponent: 1462record: 1-5 | new rating: 1428 | ||