Parra, Nelson
Current rating: 1428
Record: 4-8
| Grand Prix Chicago 2014 (JOU standard) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 302 | Preeshl, Tony (1522) | Lost 0-2 | -171445 |
| 2standard | 373 | Moore, Stefan (1463) | Won 2-0 | +181463 |
| 3standard | 322 | Ruefer, Jacob (1500) | Lost 1-2 | -171446 |
| 4standard | 433 | Cardwell, James (1434) | Lost 0-2 | -181428 |
| average opponent: 1480record: 1-3 | new rating: 1428 | |||
| Grand Prix Chicago 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 306 | Wallace, Nick (1463) | Won 2-1 | +171517 |
| 2modern | 93 | Vaca, Rob (1470) | Lost 1-2 | -191498 |
| 3modern | 252 | Karman, David (1489) | Lost 0-2 | -181480 |
| 4modern | 483 | torres, carlos e (1449) | Lost 0-2 | -181462 |
| 5modern | 454 | MODIC, JON (1464) | Lost 0-2 | -181444 |
| 6modern | 427 | Gordon, Gary (1447) | Won 2-0 | +181462 |
| 7modern | 364 | Bates, Troy W (1466) | Won 2-0 | +181480 |
| 8modern | 272 | Balauskas, Adam J (1482) | Lost 1-2 | -181462 |
| average opponent: 1466record: 3-5 | new rating: 1462 | |||