Zacek, Robert
Current rating: 1404
| Grand Prix Minneapolis 2018 (M19 limited) | starting rating: 1436 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 24 | Hubbard, Evyn (1485) | Lost 0-2 | -171419 |
| 2sealed | 330 | Schumacher, Nicholas (1482) | Lost 1-2 | -171402 |
| 3sealed | 591 | Newland, Ben (1461) | Won 2-1 | +191421 |
| 4sealed | 478 | Godfrey, Andrew (1483) | Lost 0-2 | -171404 |
| top | average opponent: 1478record: 1-3 | new rating: 1404 | ||
| Grand Prix Minneapolis 2017 (HOU standard) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 174 | Schoeppner, Mason (1550) | Lost 1-2 | -161433 |
| 2standard | 327 | Arnold, Dennis (1481) | Lost 0-2 | -171416 |
| 3standard | 470 | McGlothlin, Daniel (1464) | Lost 1-2 | -171399 |
| 4standard | 144 | Riley, Kee (1444) | Won 2-0 | +191418 |
| 5standard | 500 | Eckstrom, Zack (1469) | Won 2-0 | +191437 |
| 6standard | 339 | Kabler Sr., Jeremy (1357) | Won 2-1 | +161453 |
| 7standard | 253 | Zhao, Brian (1501) | Lost 0-2 | -171436 |
| top | average opponent: 1467record: 3-4 | new rating: 1436 | ||
| Grand Prix Milwaukee 2016 (KLD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 426 | Sweet, Nathan (1610) | Lost 1-2 | -161484 |
| 2sealed | 418 | Parnell, Andrew (1572) | Lost 1-2 | -161468 |
| 3sealed | 569 | Thorne, Jimmy (1465) | Lost 0-2 | -181450 |
| 4sealed | 600 | Small, Brandon (1445) | Won 2-1 | +171467 |
| 5sealed | 519 | Huibregtse, Curtis (1463) | Lost 1-2 | -181449 |
| top | average opponent: 1511record: 1-4 | new rating: 1449 | ||