Koehn, Brian
Current rating: 1518
Record: 5-4
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 389 | Reynolds, Ed (1500) | Lost 1-2 | -181482 |
| 2modern | 547 | Maurer, Jack (1482) | Won 2-0 | +181500 |
| 3modern | 520 | Mitchell, Melissa (1444) | Won 2-0 | +171517 |
| 4modern | 289 | Wyatt, CJ (1383) | Lost 0-2 | -201497 |
| 5modern | 306 | Powell, Shelton (1443) | Won 2-0 | +171514 |
| 6modern | 243 | Dietrich, Jake (1622) | Won 2-1 | +201534 |
| 7modern | 226 | Nicholas, Gabriel (1611) | Won 2-0 | +191553 |
| 8modern | 75 | Mellish, James (1628) | Lost 0-2 | -171536 |
| 9modern | 219 | Workman, Allan (1532) | Lost 1-2 | -181518 |
| average opponent: 1516record: 5-4 | new rating: 1518 | |||