Brunssen, Jonathan
Current rating: 1431
Record: 5-10
| Grand Prix Atlanta 2019 (legacy) | starting rating: 1414 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 244 | Fleisher, Zachary (1535) | Won 2-1 | +201434 |
| 2legacy | 181 | Alvarez, Michael (1518) | Lost 0-2 | -171417 |
| 3legacy | 317 | Gibson, James (1499) | Lost 0-1 | -161401 |
| 4legacy | 361 | Kasler, Collin (1483) | Won 2-1 | +191420 |
| 5legacy | 382 | Lam, David (1610) | Won 2-1 | +221442 |
| 6legacy | 230 | Martinez, Mario E (1886) | Lost 1-2 | -111431 |
| average opponent: 1589record: 3-3 | new rating: 1431 | |||
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 147 | Fudge, Taylor (1500) | Won 2-0 | +181518 |
| 2modern | 105 | Weihe, Sean (1678) | Lost 1-2 | -151503 |
| 3modern | 738 | Ruliffson, Brian (1500) | Lost 0-2 | -181485 |
| 4modern | 677 | Anderson, Kyle (1488) | Lost 1-2 | -181467 |
| 5modern | 785 | Cornell, Jason (1631) | Lost 0-2 | -151452 |
| 6modern | 832 | Lettieri, Matt (1444) | Won 2-0 | +181470 |
| 7modern | 729 | Quimby, Joshua (1416) | Lost 0-2 | -191451 |
| 8modern | 638 | O'Rourke, Nathaniel (1446) | Lost 1-2 | -181433 |
| 9modern | 561 | Accristo, Nicholas (1370) | Lost 1-2 | -191414 |
| average opponent: 1497record: 2-7 | new rating: 1414 | |||