Armstrong, Jirhon
Current rating: 1322
Record: 7-18-2
| Grand Prix Washington DC 2017 (HOU standard) | starting rating: 1387 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 243 | Reynolds, Ryan (1534) | Lost 1-2 | -161371 |
| 2standard | 551 | Snead, Chris (1388) | Lost 0-2 | -171354 |
| 3standard | 659 | Palamarchuk, Daniel (1464) | Lost 0-2 | -161338 |
| 4standard | 747 | Birch, Joshua (1447) | Lost 1-2 | -161322 |
| top | average opponent: 1458record: 0-4 | new rating: 1322 | ||
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1390 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 788 | Judge, Thomas (1575) | Lost 0-2 | -141376 |
| 2modern | 1024 | Andryshak, Ryan (1482) | Draw 1-1 | +21378 |
| 3modern | 1093 | Caternolo, Sarah (1477) | Lost 0-2 | -171361 |
| 4modern | 1193 | Chromulak, Jeffrey (1601) | Won 2-1 | +231384 |
| 5modern | 992 | Faraoni, Frederick (1483) | Won 2-0 | +191403 |
| 6modern | 759 | Vazquez, Josh (1468) | Lost 1-2 | -161387 |
| top | average opponent: 1514record: 2-3-1 | new rating: 1387 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 200 | Blum, Robert (1506) | Lost 0-2 | -181483 |
| 2legacy | 504 | Amerson, Mark (1473) | Lost 0-2 | -191464 |
| 3legacy | 578 | Quinlan, Adam (1451) | Lost 0-2 | -181446 |
| 4legacy | 607 | Alejandro, John (1446) | Won 2-0 | +181464 |
| 5legacy | 508 | Hayward, Tom (1353) | Lost 0-2 | -201444 |
| 6legacy | 469 | Grover, Nathan (1446) | Lost 0-2 | -181426 |
| 7legacy | 382 | Costa, Victor (1430) | Lost 1-2 | -181408 |
| 8legacy | 297 | Dyke, Bethany (1408) | Lost 0-2 | -181390 |
| top | average opponent: 1439record: 1-7 | new rating: 1390 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 230 | Strange, Jason (1550) | Lost 1-2 | -171483 |
| 2modern | 498 | Bilton, Tim (1484) | Draw 1-1 | 01483 |
| 3modern | 616 | Mathis, Jeffrey (1414) | Won 2-1 | +171500 |
| 4modern | 485 | Wirtz, Josh (1479) | Won 2-0 | +171517 |
| 5modern | 331 | Li, Brook (1618) | Lost 1-2 | -161501 |
| 6modern | 426 | Zimmerman, Brandon (1483) | Won 2-0 | +181519 |
| 7modern | 299 | Chirico, Kevin (1516) | Won 2-1 | +181537 |
| 8modern | 203 | Reiners, Mitchell (1652) | Lost 0-2 | -161521 |
| 9modern | 203 | Fuller, Jonathan (1392) | Lost 1-2 | -201501 |
| top | average opponent: 1510record: 4-4-1 | new rating: 1501 | ||