Head, David
Current rating: 1444
Record: 6-11
| Grand Prix Vancouver 2008 (extended) | starting rating: 1459 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 11 | Raney, Tom (1500) | Won 2-0 | +191478 |
| 2extended | 15 | Steier, Terry (1521) | Lost 0-2 | -181460 |
| 3extended | 129 | Taylor, Kelly (1495) | Lost 0-2 | -171443 |
| 4extended | 167 | Finnsson, Erik (1485) | Won 2-0 | +191462 |
| 5extended | 143 | Loucks, Jonathon (1467) | Lost 1-2 | -181444 |
| top | average opponent: 1494record: 2-3 | new rating: 1444 | ||
| Grand Prix Montreal 2007 (Time Spiral block) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 159 | Blondin, Francois (1518) | Won 2-1 | +191468 |
| 3block | 67 | Arthurs, Marshall (1739) | Lost 1-2 | -131455 |
| 4block | 193 | Muir, Ryan (1518) | Won 2-1 | +191474 |
| 5block | 139 | Calhoun, Bruce (1625) | Lost 0-2 | -151459 |
| top | average opponent: 1600record: 2-2 | new rating: 1459 | ||
| Grand Prix Seattle 2005 (extended) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 25 | Chu, Gim (1523) | Won 2-0 | +191469 |
| 5extended | 17 | De Rosa, Antonino (1805) | Won 2-1 | +241493 |
| 6extended | 5 | McCall, Max (1592) | Lost 1-2 | -161477 |
| 7extended | 18 | Gary, Justin (1859) | Lost 1-2 | -121465 |
| 8extended | 46 | Arant, Gary (1550) | Lost 0-2 | -161449 |
| top | average opponent: 1666record: 2-3 | new rating: 1449 | ||
| Grand Prix Seattle 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 28 | Gartman, Christopher (1500) | Lost 0-0 | -181482 |
| 5extended | 59 | Dougherty, Robert (1624) | Lost 0-0 | -151467 |
| 6extended | 51 | Randle, Jonathan (1519) | Lost 0-0 | -171450 |
| top | average opponent: 1548record: 0-3 | new rating: 1450 | ||