Byrum, John
Current rating: 1564
Record: 11-7
| Grand Prix Charlotte 2016 (modern) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 385 | Maseman, Carl (1463) | Won 2-0 | +171573 |
| 2modern | 333 | Bowhall, Robert (1349) | Won 2-1 | +141587 |
| 3modern | 381 | Patel, Tariq (1695) | Lost 0-2 | -161571 |
| 4modern | 228 | Mastrodomenico, Matthew (1466) | Won 2-1 | +161587 |
| 5modern | 238 | Bowen, Jacob (1518) | Won 2-0 | +171604 |
| 6modern | 224 | Zito, Michael (1551) | Lost 0-2 | -191585 |
| 7modern | 246 | Leff, Daniel (1497) | Won 2-0 | +161601 |
| 8modern | 231 | McFadyen, Alexander (1594) | Lost 1-2 | -181583 |
| 9modern | 324 | Watson, Kyle (1511) | Lost 1-2 | -191564 |
| average opponent: 1516record: 5-4 | new rating: 1564 | |||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1449 | Haley, Keir (1568) | Lost 0-2 | -171483 |
| 2modern | 1629 | Robertson, David (1468) | Won 2-0 | +181501 |
| 3modern | 1605 | Corbitt, Dustin (1513) | Won 2-0 | +181519 |
| 4modern | 1432 | Kane, Will (1517) | Won 2-1 | +181537 |
| 5modern | 1147 | Alfonso, Luis (1515) | Won 2-0 | +181555 |
| 6modern | 1112 | Jones, Dave W (1553) | Won 2-1 | +181573 |
| 7modern | 1006 | Lavasque, William J (1618) | Won 2-1 | +191592 |
| 8modern | 800 | Baxter III, Lincoln (1645) | Lost 1-2 | -171575 |
| 9modern | 771 | Kucera, Christopher (1572) | Lost 0-2 | -191556 |
| average opponent: 1552record: 6-3 | new rating: 1556 | |||