Seymour, William
Current rating: 1480
Record: 4-5
| Grand Prix London 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 649 | Plagge, Rainer (1513) | Lost 0-2 | -181482 |
| 2sealed | 784 | Rak, Julien (1416) | Won 2-0 | +171499 |
| 3sealed | 666 | Coenen, Peter (1521) | Lost 1-2 | -181481 |
| 4sealed | 690 | Reichl, Maximilian (1436) | Lost 0-2 | -181463 |
| 5sealed | 762 | Jarko, Vaclav (1463) | Won 2-1 | +181481 |
| 6sealed | 623 | Mares, Jiri (1462) | Lost 1-2 | -191462 |
| 7sealed | 569 | Bullen, Jack (1462) | Won 2-0 | +181480 |
| 8sealed | 440 | Knizewski, Mateusz (1484) | Lost 0-2 | -181462 |
| 9sealed | 383 | Ackermann, Amadeus (1426) | Won 2-0 | +181480 |
| average opponent: 1465record: 4-5 | new rating: 1480 | |||