Porter, John
Current rating: 1397
Record: 3-9
| Grand Prix Atlanta 2019 (legacy) | starting rating: 1426 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 220 | Bowman, Joseph (1558) | Lost 0-2 | -151411 |
| 2legacy | 301 | Costabile, Adam (1484) | Lost 0-2 | -171394 |
| 3legacy | 492 | Brennan, Adam (1445) | Lost 1-2 | -171377 |
| 4legacy | 472 | Morton, Victor (1262) | Won 2-0 | +161393 |
| 5legacy | 425 | Reed, Quinn (1396) | Won 2-1 | +181411 |
| 6legacy | 329 | Matthews, Sophie (1427) | Won 2-0 | +181429 |
| 7legacy | 252 | Dohring, Wilbur (1494) | Lost 1-2 | -171412 |
| 8legacy | 222 | Le, Sonny (1534) | Lost 1-2 | -151397 |
| average opponent: 1450record: 3-5 | new rating: 1397 | |||
| Grand Prix Louisville 2017 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 536 | Bentley, Justin (1482) | Lost 0-2 | -181482 |
| 2legacy | 786 | Kaufman, Stephannie (1417) | Lost 1-2 | -201462 |
| 3legacy | 988 | Lin, Wenxun (1459) | Lost 1-2 | -181444 |
| 4legacy | 1056 | Gunn, Trevor (1443) | Lost 0-2 | -181426 |
| average opponent: 1450record: 0-4 | new rating: 1426 | |||