Antczak, Justin C
Current rating: 1566
Record: 11-8
| Grand Prix Columbus 2010 (legacy) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 533 | Seliskar, Stephen (1500) | Won 2-1 | +171540 |
| 2legacy | 481 | Friedman, Ben (1492) | Won 2-1 | +171557 |
| 3legacy | 435 | Heilicher, Ethan (1536) | Won 2-0 | +181575 |
| 4legacy | 427 | Kirkpatrick, Sean (1553) | Won 2-0 | +171592 |
| 5legacy | 407 | Woltereck, Chris (1863) | Lost 1-2 | -131579 |
| 6legacy | 458 | Penick, John (1592) | Won 2-1 | +191598 |
| 7legacy | 427 | Cox, Patrick (1856) | Lost 0-2 | -141584 |
| 8legacy | 483 | Glackin, Ryan (1630) | Won 2-0 | +191603 |
| 9legacy | 447 | Chilbert, Colin (1677) | Won 2-1 | +191622 |
| 10legacy | 68 | Groh, Tony D (1577) | Lost 0-2 | -191603 |
| 11legacy | 53 | Larson, Mark (1589) | Lost 1-2 | -181585 |
| 12legacy | 68 | Jagasia, Gandhi (1536) | Lost 0-2 | -191566 |
| average opponent: 1617record: 7-5 | new rating: 1566 | |||
| Grand Prix Chicago 2009 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 135 | Ahmad, Anwar (1564) | Won 2-0 | +191519 |
| 2legacy | 294 | Williams, Alex (1518) | Lost 0-2 | -181501 |
| 3legacy | 228 | Chapple, Josh (1497) | Won 2-0 | +181519 |
| 4legacy | 293 | Coulombe, Kristofer (1519) | Won 2-0 | +181537 |
| 5legacy | 135 | Siftar, Nate (1604) | Won 2-1 | +191556 |
| 6legacy | 113 | Hatfield, Alix (1684) | Lost 0-2 | -151541 |
| 7legacy | 236 | Konzen, Adam J (1536) | Lost 1-2 | -181523 |
| average opponent: 1560record: 4-3 | new rating: 1523 | |||