Weidman, Joshua
Current rating: 1445
| Grand Prix Oakland 2019 (modern) | starting rating: 1461 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 110 | Cohu, Cliff (1517) | Won 2-1 | +191480 |
| 2modern | 226 | Holloway, Harrison (1423) | Won 2-0 | +171497 |
| 3modern | 73 | Johnson, Mark0892 (1391) | Lost 1-2 | -201477 |
| 4modern | 277 | Fairbanks, Robert (1665) | Lost 0-2 | -141463 |
| 5modern | 327 | Sanchez, Jack (1498) | Lost 0-2 | -181445 |
| top | average opponent: 1499record: 2-3 | new rating: 1445 | ||
| Grand Prix Sacramento 2018 (M19 limited) | starting rating: 1411 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 110 | Cartmill, Mike (1445) | Won 2-1 | +191430 |
| 2sealed | 262 | Krishnamurthi, Naveen (1518) | Lost 1-2 | -171413 |
| 3sealed | 311 | Lewis, Morgan (1502) | Won 2-0 | +201433 |
| 4sealed | 171 | Perez, Luis (1474) | Lost 1-2 | -171416 |
| 5sealed | 360 | Baker, Thomas D (1732) | Lost 0-2 | -131403 |
| 6sealed | 374 | Somers, Mike (1487) | Won 2-1 | +201423 |
| 7sealed | 325 | Eden, Aaron (1369) | Won 2-0 | +171440 |
| 8sealed | 236 | Zhang, Tony (1627) | Won 2-1 | +211461 |
| top | average opponent: 1519record: 5-3 | new rating: 1461 | ||
| Grand Prix Oakland 2016 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 11 | Peng, Tianjian (1500) | Lost 0-2 | -181482 |
| 2standard | 726 | Bailey, Amie (1482) | Lost 0-2 | -181464 |
| 3standard | 833 | Kavanaugh, Brianna (1465) | Won 2-0 | +181482 |
| 4standard | 720 | DeBord, Seth (1456) | Won 2-1 | +181500 |
| 5standard | 677 | Chan, Ryan (1501) | Lost 0-2 | -181482 |
| 6standard | 584 | Peterson, John (1419) | Lost 0-2 | -201462 |
| 7standard | 630 | Nguyen, Andrew (1511) | Lost 1-2 | -171445 |
| 8standard | 557 | Ogami, Kenneth (1542) | Lost 1-2 | -161429 |
| 9standard | 360 | Puchkov, Michael (1427) | Lost 0-2 | -181411 |
| top | average opponent: 1478record: 2-7 | new rating: 1411 | ||