Posz, Zack
Current rating: 1498
Record: 3-3
| Grand Prix Detroit 2019 (M20 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 34 | Ellery, Robert (1500) | Lost 1-2 | -181482 |
| 2sealed | 249 | Cunningham, Brittany (1424) | Lost 1-2 | -191463 |
| 3sealed | 307 | Dean, Jarrett (1462) | Won 2-1 | +181481 |
| 4sealed | 275 | Barnard, Drew (1481) | Won 2-0 | +181499 |
| 5sealed | 215 | Beernink, Riley (1521) | Won 2-1 | +181517 |
| 6sealed | 197 | Burr, Loren (1457) | Lost 0-2 | -191498 |
| average opponent: 1474record: 3-3 | new rating: 1498 | |||