Welty, David
Current rating: 1533
| Grand Prix Anaheim 2003 (extended) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 22 | Popescu, Adrian (1500) | Won 1-0 | +181524 |
| 2extended | 40 | Sun, Allen (1748) | Draw 1-1 | +41528 |
| 3extended | 42 | Donati, Chris (1539) | Won 2-0 | +191547 |
| 4extended | 47 | Taylor, Eric (1769) | Lost 0-2 | -141533 |
| top | average opponent: 1639record: 2-1-1 | new rating: 1533 | ||
| Grand Prix Los Angeles 2002 (ONS rochester) | starting rating: 1505 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 104 | Esterline, Darrin (1500) | Won 2-0 | +181523 |
| 2sealed | 97 | Mindes, Michael (1535) | Lost 0-2 | -171506 |
| 3sealed | 112 | Johnson, David (1560) | Won 2-0 | +191525 |
| 4sealed | 131 | Medaris, Michael (1517) | Lost 0-2 | -191506 |
| top | average opponent: 1528record: 2-2 | new rating: 1506 | ||
| Grand Prix Dallas 2000 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 58 | Baird, Mark (1500) | Won 2-0 | +181518 |
| 2sealed | 32 | Zacek, Richard (1485) | Won 2-1 | +171535 |
| 3sealed | 22 | LePine, Mark (1739) | Lost 1-2 | -141521 |
| 4sealed | 77 | Hawkins, Brandon (1500) | Won 2-1 | +181539 |
| 5sealed | 43 | Honan, Chris (1545) | Lost 0-2 | -181521 |
| 6sealed | 65 | Wilson, Gabriel (1669) | Lost 0-2 | -161505 |
| top | average opponent: 1573record: 3-3 | new rating: 1505 | ||