Barker, Zach
Current rating: 1677
Record: 23-14
| Grand Prix Philadelphia 2014 (BNG limited) | starting rating: 1613 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 163 | Chen, Michael (1600) | Lost 0-2 | -181595 |
| 2sealed | 735 | Sheridan, Kevin (1505) | Won 2-0 | +161611 |
| 3sealed | 504 | Schaefer, Andrew (1482) | Won 2-0 | +161627 |
| 4sealed | 235 | Eversoll, Erick (1516) | Won 2-0 | +161643 |
| 5sealed | 108 | Jenkins, Eric (1580) | Lost 1-2 | -191624 |
| 6sealed | 444 | Hitchcock, Ian (1505) | Won 2-1 | +161640 |
| 7sealed | 261 | DeMars, Brian (1846) | Won 2-0 | +211661 |
| 8sealed | 88 | Wang, Yimin (1583) | Won 0-0 | +171678 |
| 9sealed | 65 | Ingram, Stuart (1585) | Won 2-1 | +161694 |
| 10draft | 91 | Durfor, James (1604) | Won 2-0 | +161710 |
| 11draft | 61 | Hinkle, Charles (1950) | Lost 0-2 | -131697 |
| 12draft | 103 | Kim, Malcolm (1725) | Lost 1-2 | -181679 |
| 14draft | 48 | Stechler, Ryan (1606) | Won 2-0 | +171696 |
| 15draft | 39 | Kandziolka, James (1666) | Lost 0-2 | -191677 |
| top | average opponent: 1625record: 9-5 | new rating: 1677 | ||
| Grand Prix Columbus 2010 (legacy) | starting rating: 1547 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 473 | Vandenberg, Gary J (1500) | Won 2-0 | +171564 |
| 2legacy | 530 | Marshall, Brian C (1502) | Won 2-0 | +171581 |
| 3legacy | 466 | Bhagat, Zohar (1854) | Lost 0-2 | -131568 |
| 4legacy | 553 | Ruggiero, Scott A (1427) | Won 2-0 | +151583 |
| 5legacy | 525 | Payton, Tony (1552) | Won 2-1 | +181601 |
| 6legacy | 470 | Cerino, Matthew (1551) | Won 2-0 | +171618 |
| 7legacy | 445 | Coqueiro, Rafael S (1837) | Won 2-0 | +221640 |
| 8legacy | 425 | Nelson, Brad (2081) | Lost 0-2 | -111629 |
| 9legacy | 442 | Lundberg, Jason (1730) | Lost 1-2 | -161613 |
| top | average opponent: 1670record: 6-3 | new rating: 1613 | ||
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1520 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 41 | Poirier, Marc (1518) | Won 2-0 | +181538 |
| 3extended | 119 | Lancaster, Charles (1465) | Won 2-1 | +171555 |
| 4extended | 30 | Werner, Nicholas (1554) | Won 2-1 | +181573 |
| 5extended | 4 | Hall, Zack (1908) | Lost 0-2 | -121561 |
| 6extended | 107 | McCoy, Kurtis (1651) | Lost 0-2 | -161545 |
| 7extended | 126 | Phillips, Cedric (1678) | Won 2-0 | +201565 |
| 8extended | 76 | Xenidis, Fred (1557) | Lost 0-2 | -181547 |
| top | average opponent: 1619record: 4-3 | new rating: 1547 | ||
| Grand Prix New Jersey 2006 (TSP limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 145 | Pennega, David (1500) | Won 2-1 | +181518 |
| 2sealed | 101 | Wilkie, Steve (1459) | Won 2-0 | +171535 |
| 3sealed | 107 | Okazaki, Yoshihiko (1512) | Won 2-0 | +181553 |
| 4sealed | 42 | Williamson, Michael (1535) | Lost 0-2 | -191534 |
| 5sealed | 187 | Navickas, Justin D (1533) | Lost 1-2 | -181516 |
| 6sealed | 170 | Soorani, Shaheen (1616) | Won 2-1 | +201536 |
| 7sealed | 114 | LePine, Mark (1674) | Lost 0-2 | -161520 |
| top | average opponent: 1547record: 4-3 | new rating: 1520 | ||