Cook, Justin
Current rating: 1608
Record: 15-9-3
| Grand Prix Memphis 2015 (FRF standard) | starting rating: 1562 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 52 | Beke, Marina (1500) | Won 2-1 | +171579 |
| 2standard | 228 | Martens, Brooks (1573) | Won 2-1 | +181597 |
| 3standard | 44 | Pickel, Zachary (1536) | Won 2-1 | +171614 |
| 4standard | 105 | Donegan, Dylan (1698) | Won 2-1 | +191633 |
| 5standard | 26 | Rubin, Steve (2055) | Lost 0-2 | -101623 |
| 6standard | 115 | Sigrist, Mike (2038) | Lost 1-2 | -111612 |
| 7standard | 162 | Kalkbrenner, Matthew (1539) | Won 2-1 | +171629 |
| 8standard | 118 | Towery, Allen (1460) | Lost 1-2 | -211608 |
| top | average opponent: 1675record: 5-3 | new rating: 1608 | ||
| Grand Prix Kansas City 2008 (ALA limited) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 51 | Rippeto, Patrick (1500) | Lost 0-2 | -191532 |
| 2sealed | 275 | strickell, seth P (1482) | Won 2-0 | +171549 |
| 3sealed | 211 | Schmidt, Tony (1499) | Draw 1-1 | -11548 |
| 4sealed | 246 | Zezula, Thomas (1465) | Won 2-1 | +171565 |
| 5sealed | 175 | Niggemeyer, Kurt A (1518) | Won 2-0 | +171582 |
| 6sealed | 113 | Hunt, Kevin (1487) | Lost 1-2 | -201562 |
| top | average opponent: 1492record: 3-2-1 | new rating: 1562 | ||
| Grand Prix Indianapolis 2008 (SHM limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 9 | Sieber, John (1500) | Won 2-1 | +181517 |
| 2sealed | 104 | polk, mark e (1518) | Won 2-0 | +181535 |
| 3sealed | 116 | Stewart, Michael (1545) | Draw 1-1 | 01535 |
| 4sealed | 135 | Blume, Andrew (1539) | Won 2-0 | +181553 |
| 5sealed | 70 | Valkanas, Andrew (1452) | Draw 1-1 | -21551 |
| 6sealed | 146 | Halgren, Nick (1555) | Lost 0-2 | -171534 |
| 7sealed | 211 | Farnung, Ian (1537) | Won 2-0 | +181552 |
| 8sealed | 148 | Schram, Jeremy L (1555) | Won 2-1 | +181570 |
| 9sealed | 99 | Crivello, Andy (1542) | Lost 0-2 | -191551 |
| top | average opponent: 1527record: 5-2-2 | new rating: 1551 | ||
| Grand Prix Detroit 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 24 | Zgrabik, Christopher (1463) | Won 2-0 | +171517 |
| 2block | 109 | Chojnacki, Robert (1517) | Lost 1-2 | -181499 |
| 3block | 187 | Yarsevich, Ben (1499) | Won 2-1 | +181517 |
| 4block | 103 | Bonnell, Heather (1501) | Lost 1-2 | -181499 |
| top | average opponent: 1495record: 2-2 | new rating: 1499 | ||