Zinky, John
Current rating: 1463
Record: 1-3
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 86 | Hollen, Donald M (1500) | Lost 0-2 | -181482 |
| 2sealed | 622 | Norton, Chris (1441) | Won 2-1 | +171499 |
| 3sealed | 403 | Shubert, Andrea (1483) | Lost 0-2 | -181481 |
| 4sealed | 677 | Schneider, Daniel (1482) | Lost 1-2 | -181463 |
| average opponent: 1476record: 1-3 | new rating: 1463 | |||