Kozak, Erich
Current rating: 1446
Record: 4-8
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 403 | Guthrie, David (1500) | Won 2-0 | +201451 |
| 2modern | 277 | Laskar, David (1548) | Won 2-1 | +191470 |
| 3modern | 238 | Cook, Jacob (1598) | Won 2-1 | +211491 |
| 4modern | 111 | Hryniuk, Graham (1631) | Lost 0-2 | -161475 |
| 5modern | 253 | Nakao, Motohiko (1840) | Lost 0-2 | -111464 |
| 6modern | 486 | Armstrong, Sean (1510) | Lost 1-2 | -181446 |
| top | average opponent: 1604record: 3-3 | new rating: 1446 | ||
| Grand Prix Las Vegas 2018 (limited) (DOM limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1327 | Selk, Patrick (1743) | Lost 0-2 | -131451 |
| 2sealed | 558 | Fitzgerald, Devin (1415) | Won 2-0 | +171468 |
| 3sealed | 541 | Siejko, Skyyler (1435) | Lost 1-2 | -181450 |
| 4sealed | 610 | Savidan, Adam (1433) | Lost 0-2 | -191431 |
| top | average opponent: 1506record: 1-3 | new rating: 1431 | ||
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 760 | Jung, Andrew (1487) | Lost 1-2 | -181482 |
| 2modern | 917 | Sweat, Zachary (1488) | Lost 1-2 | -181464 |
| top | average opponent: 1488record: 0-2 | new rating: 1464 | ||