Howell, Jonathan
Current rating: 1417
Record: 8-15-2
| Grand Prix Atlanta 2017 (XLN standard) | starting rating: 1375 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 149 | Gaudet, Brandon (1606) | Draw 1-1 | +41379 |
| 2standard | 345 | Elliott, Shane (1447) | Lost 0-1 | -171362 |
| 3standard | 580 | Watson, Andrew (1580) | Lost 0-2 | -141348 |
| 4standard | 623 | Kelly, Nate (1402) | Won 2-0 | +191367 |
| 5standard | 528 | Hernandez, Eddy (1484) | Draw 1-1 | +21369 |
| 6standard | 548 | MacDonald, Dan (1759) | Won 1-0 | +251394 |
| 7standard | 461 | Gille, Brandon (1528) | Won 2-0 | +201414 |
| 8standard | 365 | Matos, Daniel (1585) | Won 2-0 | +211435 |
| 9standard | 276 | Van Zee, Will (1438) | Lost 0-2 | -181417 |
| top | average opponent: 1537record: 4-3-2 | new rating: 1417 | ||
| Grand Prix Atlanta 2016 (KLD limited) | starting rating: 1398 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 969 | Amin, Gaurang (1500) | Won 2-0 | +191417 |
| 2sealed | 691 | Bishop, Jesse (1446) | Lost 1-2 | -171400 |
| 3sealed | 1178 | Jansen, Morgan (1467) | Won 2-0 | +191419 |
| 4sealed | 766 | Olsen, Christopher (1534) | Lost 0-2 | -161403 |
| 5sealed | 935 | Hicks, James (1525) | Won 2-0 | +201423 |
| 6sealed | 976 | Villalpando, Mark (1567) | Lost 1-2 | -151408 |
| 7sealed | 968 | Toebben, Nick (1505) | Lost 0-2 | -161392 |
| 8sealed | 975 | Findley, Anna (1441) | Lost 0-2 | -171375 |
| top | average opponent: 1498record: 3-5 | new rating: 1375 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1411 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 379 | Eyre, James (1500) | Won 2-0 | +191430 |
| 2modern | 88 | Holland, Joe (1514) | Lost 1-2 | -161414 |
| 3modern | 852 | Mackay, Drew (1501) | Lost 0-2 | -161398 |
| top | average opponent: 1505record: 1-2 | new rating: 1398 | ||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 897 | Felch, Matthew P (1500) | Lost 1-2 | -181482 |
| 2modern | 939 | Cornwall, Gary (1544) | Lost 0-2 | -171465 |
| 3modern | 1093 | Pickar, Charles (1466) | Lost 0-2 | -181447 |
| 4modern | 1128 | Horan, Kevin (1427) | Lost 1-2 | -181429 |
| 5modern | 1037 | Smith, James T (1431) | Lost 0-2 | -181411 |
| top | average opponent: 1473record: 0-5 | new rating: 1411 | ||