Underwood, Zach
Current rating: 1467
Record: 3-5-1
| Grand Prix Indianapolis 2015 (BFZ standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 273 | Quesada, Victor (1500) | Won 2-0 | +191501 |
| 2standard | 44 | Webb, Jacob (1466) | Won 2-0 | +171518 |
| 3standard | 53 | Rasmussen, Jeff (1715) | Lost 0-2 | -141504 |
| 4standard | 215 | Parkinson, James (1496) | Lost 0-2 | -191485 |
| 5standard | 309 | Mattie, David (1466) | Lost 0-2 | -181467 |
| average opponent: 1529record: 2-3 | new rating: 1467 | |||
| Grand Prix Miami 2015 (FRF standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 315 | Landin, Dustin (1478) | Draw 1-1 | 01500 |
| 2standard | 325 | Jones, Logan (1501) | Won 2-0 | +181518 |
| 3standard | 278 | Schroeder, Ryan (1518) | Lost 1-2 | -181500 |
| 4standard | 144 | Dieppa, Andrew U (1536) | Lost 0-2 | -181482 |
| average opponent: 1508record: 1-2-1 | new rating: 1482 | |||