Armstrong, Billy
Current rating: 1432
| Grand Prix Houston 2016 (OGW standard) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 279 | McMillen, John (1486) | Lost 1-2 | -181466 |
| 2standard | 521 | Garcia, Hector (1482) | Won 2-0 | +181484 |
| 3standard | 702 | Nguyen, Alan (1499) | Lost 0-2 | -171467 |
| 4standard | 729 | Quimby, Joshua (1447) | Won 2-1 | +171484 |
| 5standard | 575 | Harrington, Evan (1500) | Lost 0-2 | -181466 |
| 6standard | 569 | Del Pino, Brent (1527) | Lost 1-2 | -161450 |
| 7standard | 641 | Faulk, John (1462) | Lost 0-2 | -181432 |
| top | average opponent: 1486record: 2-5 | new rating: 1432 | ||
| Grand Prix Lincoln 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 22 | Richardson, Kenn R (1502) | Lost 0-2 | -181482 |
| 2modern | 268 | Smith, Barry (1462) | Won 2-1 | +181500 |
| 3modern | 157 | Buss, John (1500) | Won 2-0 | +181518 |
| 4modern | 154 | Zoz, Ben (1658) | Draw 1-1 | +21520 |
| 5modern | 178 | McCall, Brian (1520) | Lost 1-2 | -181502 |
| 6modern | 230 | Plocher, Justin (1483) | Lost 0-2 | -181484 |
| top | average opponent: 1521record: 2-3-1 | new rating: 1484 | ||
| Grand Prix Houston 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 127 | Boyd, Jacob (1500) | Won 2-0 | +181518 |
| 2extended | 48 | Bisconde, Jherjames R (1500) | Lost 0-1 | -181500 |
| 3extended | 209 | Walters, Eric (1500) | Lost 1-2 | -181482 |
| 4extended | 279 | Flynn, Randy (1538) | Won 2-0 | +191501 |
| 5extended | 210 | CERNA, ROBERTO (1499) | Won 2-0 | +181519 |
| 6extended | 150 | Peck, Donnie (1486) | Lost 0-2 | -191500 |
| top | average opponent: 1504record: 3-3 | new rating: 1500 | ||