Colhour, Zachary
Current rating: 1448
Record: 3-6
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 395 | Snyder, Asa (1562) | Lost 0-2 | -171483 |
| 2modern | 458 | Glady, Eric (1429) | Won 2-0 | +171500 |
| 3modern | 419 | Holmes, Ronnie (1484) | Lost 0-0 | -181482 |
| 4modern | 527 | Barnes, David [USA] (1484) | Lost 0-2 | -181464 |
| 5modern | 516 | Crandall, Dale (1431) | Won 2-1 | +171481 |
| 6modern | 407 | Bryant, Brock (1478) | Lost 0-2 | -181463 |
| 7modern | 345 | Dobberstein, Alex (1528) | Lost 0-1 | -171446 |
| 8modern | 294 | Perigo, Jonathan (1509) | Lost 0-1 | -161430 |
| 9modern | 245 | Sposato, Jared (1426) | Won 1-0 | +181448 |
| average opponent: 1481record: 3-6 | new rating: 1448 | |||