Mack, Jeffrey
Current rating: 1481
Record: 3-4
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 136 | Brady, Bryan (1500) | Lost 1-2 | -181482 |
| 2modern | 437 | Burns, Ned (1450) | Won 2-1 | +171499 |
| 3modern | 292 | Thompson, Kevin (1528) | Lost 1-2 | -171482 |
| 4modern | 512 | Wojick, Kimberlee (1507) | Lost 1-2 | -181464 |
| 5modern | 505 | Martin, Caleb (1464) | Won 2-0 | +181482 |
| 6modern | 368 | Fuhrman, Curtis (1460) | Won 2-1 | +181500 |
| 7modern | 312 | Ekendahl, Frans (1462) | Lost 0-2 | -191481 |
| average opponent: 1482record: 3-4 | new rating: 1481 | |||