Welsh, Jason
Current rating: 1517
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 247 | Creutz, Christian (1586) | Won 2-0 | +201516 |
| 2sealed | 111 | Obuks, Kirils (1547) | Draw 1-1 | 01516 |
| 3sealed | 310 | Kamil, Oded (1536) | Won 2-0 | +191535 |
| 4sealed | 147 | De Jong, Tim (1536) | Won 2-1 | +181553 |
| 5sealed | 72 | Morel, Sebastien (1591) | Lost 0-2 | -181535 |
| 6sealed | 200 | Van Veelen, Evertjan (1543) | Lost 0-2 | -181517 |
| top | average opponent: 1557record: 3-2-1 | new rating: 1517 | ||
| Grand Prix Chicago 2009 (legacy) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 4legacy | 96 | McDuffie, Korey (1658) | Lost 0-1 | -151451 |
| 5legacy | 130 | Cappel, Avery (1536) | Won 2-1 | +201471 |
| 6legacy | 97 | Coqueiro, Rafael S (1548) | Lost 0-2 | -171454 |
| 7legacy | 161 | King, James (1459) | Won 2-1 | +181472 |
| 8legacy | 163 | Lefkowitz, Aaron D (1553) | Won 2-0 | +201492 |
| 9legacy | 79 | Kammer, Michael (1717) | Draw 1-1 | +41496 |
| top | average opponent: 1579record: 3-2-1 | new rating: 1496 | ||
| Grand Prix Birmingham 2008 (Lorwyn block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 44 | Marriott, Richard (1449) | Lost 1-2 | -191481 |
| 2block | 182 | Leonard, Micheal (1559) | Won 2-0 | +201501 |
| 3block | 128 | Bell, Nathan (1487) | Lost 0-2 | -191482 |
| 4block | 223 | Ratcliffe, Miles (1446) | Won 2-0 | +181500 |
| 5block | 144 | Przygocki, David (1498) | Lost 0-2 | -181482 |
| 6block | 200 | Krejsa, Tomas (1613) | Lost 0-0 | -161466 |
| top | average opponent: 1509record: 2-4 | new rating: 1466 | ||