Hartness, John
Current rating: 1466
Record: 13-16
| Grand Prix Louisville 2017 (legacy) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 593 | Simon, Michael (1847) | Lost 1-2 | -121540 |
| 4legacy | 801 | Potter, Rusty (1339) | Lost 0-2 | -221518 |
| 5legacy | 895 | Griffith, Sean (1481) | Lost 1-2 | -191499 |
| 6legacy | 821 | Storms, Robert (1491) | Lost 1-2 | -181481 |
| 7legacy | 858 | Greene, Hannah (1625) | Lost 0-2 | -151466 |
| top | average opponent: 1557record: 0-5 | new rating: 1466 | ||
| Grand Prix Albuquerque 2016 (SOI limited) | starting rating: 1544 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 71 | Walsh, Tyler [USA] (1517) | Won 2-0 | +181562 |
| 3sealed | 240 | Myrick, Ethan (1785) | Won 2-0 | +221584 |
| 4sealed | 125 | Cappetta, G. J. (1595) | Won 2-1 | +181602 |
| 5sealed | 60 | Mendoza, Eddie (1541) | Lost 1-2 | -191583 |
| 6sealed | 129 | Quinn, Serena (1843) | Lost 0-2 | -131570 |
| 7sealed | 220 | Wilken, Frank (1494) | Lost 0-2 | -201550 |
| 8sealed | 257 | Snow, Daniel (1565) | Won 2-0 | +181568 |
| 9sealed | 179 | Orts, Zachary (1679) | Lost 0-2 | -161552 |
| top | average opponent: 1627record: 4-4 | new rating: 1552 | ||
| Grand Prix Atlanta 2015 (BFZ limited) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 412 | Watson, Nick (1742) | Lost 1-2 | -141547 |
| 4sealed | 600 | Feeney, Luke (1518) | Won 2-1 | +171564 |
| 5sealed | 292 | Jenkins, James (1505) | Lost 1-2 | -191545 |
| 6sealed | 536 | Stamness, Matthew (1568) | Lost 0-2 | -181527 |
| 7sealed | 453 | Jaeger, Tony (1443) | Won 2-1 | +171544 |
| 8sealed | 295 | Cranfill, Drew (1565) | Lost 1-2 | -181526 |
| 9sealed | 304 | Cammack, Franklin (1532) | Won 2-0 | +181544 |
| top | average opponent: 1553record: 3-4 | new rating: 1544 | ||
| Grand Prix Atlanta 2014 (JOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 346 | Ferrell, Joseph (1500) | Lost 0-2 | -181482 |
| 2sealed | 589 | Seibert, Andrew (1480) | Won 2-0 | +181500 |
| 3sealed | 632 | Michaels, Jordan (1500) | Won 2-0 | +181518 |
| 4sealed | 410 | Lovell, Mitch (1496) | Won 2-0 | +181536 |
| 5sealed | 419 | Thomas, Neil (1570) | Won 2-0 | +181554 |
| 6sealed | 295 | Hurley, Jacob (1556) | Won 2-1 | +181572 |
| 7sealed | 308 | Bursavich, Austin (1899) | Lost 0-2 | -121560 |
| 8sealed | 393 | Wrigley, Abraham (1557) | Won 2-0 | +181578 |
| 9sealed | 307 | Meadors, John (1651) | Lost 1-2 | -171561 |
| top | average opponent: 1579record: 6-3 | new rating: 1561 | ||