Welch, Jacob
Current rating: 1370
Record: 11-20-1
| Grand Prix Boston 2003 (LGN limited) | starting rating: 1475 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 126 | Jackson, Allen (1529) | Lost 0-2 | -171458 |
| 3sealed | 173 | Pendl, Frank (1501) | Lost 0-2 | -171441 |
| 4sealed | 217 | Cloutier, Olivier (1496) | Lost 0-2 | -171424 |
| 5sealed | 211 | Folinus, Jeff (1463) | Lost 1-2 | -171407 |
| 6sealed | 176 | Faga, Ben (1328) | Lost 0-2 | -201387 |
| 7sealed | 141 | Boyce, James (1409) | Lost 1-2 | -171370 |
| top | average opponent: 1454record: 0-6 | new rating: 1370 | ||
| Grand Prix Las Vegas 2001 (extended) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 89 | Menery, Sheldon (1500) | Draw 1-1 | +11467 |
| 2extended | 113 | Allen, John (1500) | Lost 0-2 | -181449 |
| 3extended | 163 | Smith, Steven (1448) | Won 2-0 | +181467 |
| 4extended | 146 | Thompson, Keith (1500) | Won 2-1 | +191486 |
| 5extended | 114 | Prokopin, Adam (1787) | Lost 1-2 | -131473 |
| 6extended | 121 | Stockton, Mark (1556) | Lost 0-2 | -161457 |
| 7extended | 110 | Llewellyn, Nick (1483) | Won 2-0 | +181475 |
| top | average opponent: 1539record: 3-3-1 | new rating: 1475 | ||
| Grand Prix Minneapolis 2001 (Invasion block) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 148 | Turner, Kevin (1500) | Won 2-0 | +181501 |
| 2block | 13 | Klein, Andrew (1440) | Lost 1-2 | -191482 |
| 3block | 84 | Greuel, Matthew (1500) | Lost 1-2 | -171465 |
| 4block | 154 | Cance, Kyle (1484) | Lost 0-2 | -181447 |
| 5block | 152 | Franks, Nathan (1464) | Won 2-0 | +181465 |
| 6block | 127 | Dodson, Jennifer (1488) | Lost 1-2 | -171448 |
| 7block | 113 | Bromen, Paul (1464) | Won 2-0 | +181466 |
| top | average opponent: 1477record: 3-4 | new rating: 1466 | ||
| Grand Prix Seattle 2000 (extended) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 8 | Sutherland, Chris (1518) | Lost 0-0 | -171456 |
| 3extended | 80 | Manning, Cal (1500) | Won 0-0 | +181474 |
| 4extended | 71 | Lambert, David (1518) | Won 0-0 | +191493 |
| 5extended | 28 | Hacker, Brian (1697) | Lost 0-0 | -141479 |
| 6extended | 58 | Cook, Cy (1577) | Won 0-0 | +201499 |
| 7extended | 50 | Cunningham, Jeff (1631) | Lost 0-0 | -161483 |
| top | average opponent: 1574record: 3-3 | new rating: 1483 | ||
| Grand Prix Kansas City 1999 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 15 | Jensen, Cory (1500) | Won 0-0 | +181518 |
| 5extended | 18 | Finkel, Jon (1958) | Lost 0-0 | -101508 |
| 6extended | 49 | James, Carl (1536) | Won 0-0 | +181526 |
| 7extended | 25 | Parr, Brent (1525) | Lost 0-0 | -181508 |
| 8extended | 28 | Kremeier, Ryan (1520) | Lost 0-0 | -181490 |
| 9extended | 30 | Matter, Jeff (1523) | Lost 0-0 | -171473 |
| top | average opponent: 1594record: 2-4 | new rating: 1473 | ||