Colton, Robert
Current rating: 1548
| Grand Prix Bologna 2019 (legacy) | starting rating: 1571 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 385 | Nevot, Jordi (1467) | Won 2-1 | +161587 |
| 2legacy | 30 | Chandler, Vincent (1516) | Lost 0-2 | -191568 |
| 3legacy | 566 | Degl'innocenti, Tiziano (1563) | Won 2-1 | +181586 |
| 4legacy | 364 | Irons, Sonny (1434) | Lost 1-2 | -211565 |
| 5legacy | 570 | Jablonski, Tomasz (1585) | Lost 1-2 | -171548 |
| top | average opponent: 1513record: 2-3 | new rating: 1548 | ||
| Grand Prix Manchester 2012 (DKA limited) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 456 | Cox, Tobias L (1505) | Won 2-1 | +181535 |
| 2sealed | 492 | Antill, Brett (1498) | Won 2-1 | +171552 |
| 3sealed | 487 | Blake, Kevin (1616) | Lost 1-2 | -171535 |
| 4sealed | 526 | Chaney, Matt (1652) | Lost 0-2 | -161519 |
| 5sealed | 552 | Plagge, Rainer (1481) | Won 2-1 | +181537 |
| 6sealed | 542 | van den Oever, Roy (1630) | Won 2-1 | +191556 |
| 7sealed | 486 | Harvey, Simon (1508) | Won 2-0 | +171573 |
| 8sealed | 483 | Kaarls, Leonard (1520) | Won 2-1 | +171590 |
| 9sealed | 551 | Lihoreau, Ibai (1524) | Lost 0-2 | -191571 |
| top | average opponent: 1548record: 6-3 | new rating: 1571 | ||
| Grand Prix Birmingham 2008 (Lorwyn block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 187 | Pires, Wayne (1500) | Won 2-0 | +181518 |
| 2block | 2 | Moate, Matthew (1500) | Won 2-0 | +181536 |
| 3block | 2 | Vicente Ferrer, Ricardo (1586) | Lost 1-2 | -171519 |
| 4block | 135 | Spurgeon, Paul A (1518) | Won 2-1 | +181537 |
| 5block | 91 | Brooks, Sean (1538) | Lost 0-2 | -181519 |
| 6block | 149 | Light, Matthew (1413) | Lost 0-0 | -201499 |
| 7block | 148 | Kraftling, Petter (1511) | Won 2-1 | +181517 |
| top | average opponent: 1509record: 4-3 | new rating: 1517 | ||