Bertelsman, Jon
Current rating: 1520
Record: 4-3-1
| Grand Prix Dallas-Fort Worth 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 176 | Delbert, Matthew (1500) | Won 2-1 | +181518 |
| 2modern | 205 | Hicks, Theodore (1477) | Draw 1-1 | -11517 |
| 3modern | 248 | Ranallo, Anthony (1516) | Won 2-0 | +181535 |
| 4modern | 128 | Walker, David (1503) | Won 2-1 | +181553 |
| 5modern | 69 | Alford, Gerrick (1621) | Won 2-0 | +191572 |
| 6modern | 32 | Mosteller, Bennett (1634) | Lost 0-2 | -171555 |
| 7modern | 97 | Katz, Samuel (1604) | Lost 0-2 | -171538 |
| 8modern | 175 | Lawrence, Hunter (1536) | Lost 0-2 | -181520 |
| average opponent: 1549record: 4-3-1 | new rating: 1520 | |||