Piereson, Andrew
Current rating: 1432
Record: 3-7
| Grand Prix Detroit 2016 (modern) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 160 | Jones, Matthew (1407) | Lost 1-2 | -191448 |
| 2modern | 976 | Johnson, Steve E (1481) | Won 2-0 | +181466 |
| 3modern | 755 | Jacobs, Christopher (1504) | Lost 1-2 | -171449 |
| 4modern | 1059 | Smith, Colton (1510) | Lost 0-2 | -171432 |
| average opponent: 1476record: 1-3 | new rating: 1432 | |||
| Grand Prix Phoenix 2014 (BNG standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 75 | Dewees, Aaron (1500) | Lost 0-2 | -181482 |
| 2standard | 456 | Webb, Joe (1482) | Won 2-1 | +181500 |
| 3standard | 514 | Malins, Krisjanis (1500) | Lost 0-2 | -181482 |
| 4standard | 504 | Ernst, Nicholas (1483) | Lost 0-2 | -181464 |
| 5standard | 357 | Cook, Michael (1519) | Won 2-0 | +191483 |
| 6standard | 352 | Lowe, Amory (1572) | Lost 0-2 | -161467 |
| average opponent: 1509record: 2-4 | new rating: 1467 | |||