Roberson, John
Current rating: 1403
Record: 11-18
| Grand Prix Tampa Bay 2019 (modern) | starting rating: 1419 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 266 | Curry, Albert (1500) | Lost 0-2 | -161403 |
| top | record: 0-1 | new rating: 1403 | ||
| Grand Prix Orlando 2018 (M19 standard) | starting rating: 1402 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 169 | Sprouse, Sean (1580) | Won 2-1 | +211423 |
| 2standard | 61 | Bentley, Brent (1585) | Lost 1-2 | -151408 |
| 3standard | 391 | Murray, Tom (1485) | Lost 1-2 | -171391 |
| 4standard | 403 | Falk, Tyler (1481) | Won 2-0 | +201411 |
| 5standard | 256 | Richmann, Adrian (1646) | Lost 1-2 | -141397 |
| 6standard | 359 | Freeman, Michael (1456) | Won 2-0 | +191416 |
| 7standard | 269 | Schatzman, Robert (1524) | Lost 0-2 | -161400 |
| 8standard | 223 | Roberts, Caitlyn (1480) | Won 2-0 | +191419 |
| top | average opponent: 1530record: 4-4 | new rating: 1419 | ||
| Grand Prix Phoenix 2018 (modern) | starting rating: 1430 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 332 | Whitcomb, James (1514) | Lost 0-2 | -161414 |
| 2modern | 447 | Panchyshyn, Aron (1387) | Lost 0-2 | -191395 |
| 3modern | 563 | Jurgensen, Alex (1467) | Lost 1-2 | -161379 |
| 4modern | 629 | Welch, Trenten (1448) | Lost 0-2 | -171362 |
| 5modern | 579 | Oesterblad, Daniel (1433) | Won 2-0 | +191381 |
| 6modern | 503 | Smith, Gabriel (1455) | Lost 1-2 | -161365 |
| 7modern | 417 | Harlan, Nicholas (1393) | Won 2-0 | +181383 |
| 8modern | 355 | Petersen, Sam (1409) | Won 2-0 | +191402 |
| top | average opponent: 1438record: 3-5 | new rating: 1402 | ||
| Grand Prix Toronto 2018 (modern) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 42 | Chamberlain, Matthew (1396) | Lost 0-2 | -191446 |
| 2modern | 634 | Rancourt, Jeremie (1487) | Lost 1-2 | -171429 |
| 3modern | 751 | Vanderbeek, Chris (1463) | Won 2-1 | +181447 |
| 4modern | 591 | Webb, Nicholas (1429) | Lost 0-2 | -181429 |
| 5modern | 672 | Constantinidis, Alexandra (1463) | Lost 0-2 | -171412 |
| 6modern | 645 | Angle, Travis (1389) | Won 2-0 | +171429 |
| 7modern | 539 | Barnes, Shawn (1453) | Lost 1-2 | -171412 |
| 8modern | 448 | He, Xiang Yu (1444) | Won 2-1 | +181430 |
| top | average opponent: 1440record: 3-5 | new rating: 1430 | ||
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 234 | Growney, Noah (1500) | Lost 0-2 | -181482 |
| 2sealed | 424 | Pollock, Kristin (1502) | Lost 1-2 | -181464 |
| 3sealed | 465 | Taylor, Joshua (1620) | Won 2-0 | +211485 |
| 4sealed | 398 | Nichols, Gary (1386) | Lost 0-2 | -201465 |
| top | average opponent: 1502record: 1-3 | new rating: 1465 | ||