Cox, Zach
Current rating: 1403
| Grand Prix Charlotte 2015 (modern) | starting rating: 1415 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1375 | Hargett, Will (1500) | Lost 1-2 | -161399 |
| 2modern | 1567 | Scheuer, Kate (1482) | Won 2-1 | +191418 |
| 3modern | 1484 | Mcmillan, Brian (1506) | Won 2-1 | +201438 |
| 4modern | 1515 | Green, Austin (1518) | Lost 1-2 | -171421 |
| 5modern | 1382 | Giammillaro, Antonio (1455) | Lost 1-2 | -171404 |
| 6modern | 1356 | Thiebaut, Donald (1482) | Won 2-0 | +191423 |
| 7modern | 1162 | Hill, James (1272) | Lost 0-2 | -201403 |
| top | average opponent: 1459record: 3-4 | new rating: 1403 | ||
| Grand Prix Cincinnati 2014 (BNG standard) | starting rating: 1427 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 274 | Taylor, Montgomery (1484) | Won 2-1 | +191446 |
| 2standard | 264 | Thomas, Zachary (1482) | Lost 0-2 | -171429 |
| 3standard | 354 | Langston, Benjamin (1480) | Won 2-0 | +191448 |
| 4standard | 500 | McGovern, Clint (1577) | Lost 1-2 | -161432 |
| 5standard | 564 | Hyun, Ryan (1487) | Lost 0-2 | -171415 |
| top | average opponent: 1502record: 2-3 | new rating: 1415 | ||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 808 | Brucher, Dustin (1500) | Lost 0-2 | -181482 |
| 2sealed | 1161 | Crawford, Stuart T (1466) | Lost 0-2 | -181464 |
| 3sealed | 1142 | Bowhall, Robert (1464) | Lost 0-2 | -181446 |
| 4sealed | 1180 | Duval, Anthony (1422) | Lost 0-2 | -191427 |
| top | average opponent: 1463record: 0-4 | new rating: 1427 | ||