Barnum, David
Current rating: 1479
Record: 16-18
| Grand Prix Denver 2011 (MBS limited) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 509 | Buth, Andrew (1521) | Won 2-1 | +191473 |
| 2sealed | 426 | Jarvis, Steven (1595) | Won 2-1 | +201493 |
| 3sealed | 440 | Becker, Matthew M (1602) | Lost 0-2 | -161477 |
| 4sealed | 525 | Taulbee, Aj (1468) | Won 2-1 | +181495 |
| 5sealed | 476 | Schreier, Todd (1527) | Won 2-0 | +181513 |
| 6sealed | 426 | Wetzel, Aaron (1561) | Lost 1-2 | -171496 |
| 7sealed | 464 | Gaffney, James A (1520) | Lost 0-2 | -171479 |
| top | average opponent: 1542record: 4-3 | new rating: 1479 | ||
| Grand Prix Kansas City 2008 (ALA limited) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 72 | Douglas, Dylan (1500) | Lost 0-2 | -171450 |
| 2sealed | 261 | Wilson, Payne (1465) | Lost 1-2 | -181432 |
| 3sealed | 315 | Dailey, Chris (1467) | Won 2-1 | +191451 |
| 4sealed | 302 | Hinton, Rob (1482) | Lost 1-2 | -181433 |
| 5sealed | 256 | Schmidt, Tony (1482) | Won 2-0 | +191452 |
| 6sealed | 218 | Schmidt, Gary (1481) | Lost 0-2 | -171435 |
| 7sealed | 176 | Ho, Anthony (1463) | Won 2-0 | +181453 |
| 8sealed | 134 | Beppu, Daniel H (1444) | Lost 0-2 | -181435 |
| 9sealed | 109 | Boyle, Justin M (1466) | Won 2-0 | +191454 |
| top | average opponent: 1472record: 4-5 | new rating: 1454 | ||
| Grand Prix Denver 2008 (Lorwyn block) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 188 | Boysen, Bill (1481) | Won 2-1 | +181502 |
| 2block | 136 | Erickson, Lincoln (1484) | Lost 0-2 | -191483 |
| 3block | 188 | Lipsky, Michael B (1500) | Lost 0-2 | -171466 |
| 4block | 233 | Bachmann, Sam (1439) | Won 2-0 | +171483 |
| 5block | 156 | Wehrmacher, Karl P (1598) | Lost 0-2 | -161467 |
| top | average opponent: 1501record: 2-3 | new rating: 1467 | ||
| Grand Prix Salt Lake City 2005 (Kamigawa block) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 55 | Johnson, Jake (1485) | Won 2-0 | +181498 |
| 2block | 32 | Szymanski, Joseph (1518) | Won 2-0 | +191517 |
| 3block | 14 | Kemker, Rachel (1536) | Lost 1-2 | -181499 |
| 4block | 73 | Yelton, Taylor (1585) | Lost 0-2 | -171482 |
| 5block | 82 | Shelton, Shannon (1500) | Won 2-0 | +191501 |
| 6block | 63 | Eleyet, Bryan (1549) | Lost 0-2 | -171484 |
| top | average opponent: 1529record: 3-3 | new rating: 1484 | ||
| Grand Prix Denver 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 45 | Irwin, Brad (1500) | Won 2-1 | +181518 |
| 2block | 12 | Lemmer, Jason (1500) | Lost 1-2 | -181500 |
| 3block | 137 | Jones, Bart (1500) | Lost 0-2 | -181482 |
| 4block | 144 | Robinson, Matt (1483) | Won 2-0 | +181500 |
| 5block | 127 | Williams, Shane (1407) | Lost 0-2 | -201480 |
| 6block | 121 | Sambrano, Daniel (1480) | Lost 1-2 | -181462 |
| 7block | 116 | Allen, Travis (1464) | Won 2-1 | +181480 |
| top | average opponent: 1476record: 3-4 | new rating: 1480 | ||