Gucklhorn, David
Current rating: 1515
Record: 8-8
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 606 | Aschenbrenner, Timo (1530) | Won 2-0 | +191484 |
| 2sealed | 545 | Hovorka, Jiri (1518) | Won 2-1 | +191503 |
| 3sealed | 541 | Schneider, Philipp (1512) | Won 2-1 | +181521 |
| 4sealed | 515 | Bosselmann, Tobias (1678) | Lost 1-2 | -151506 |
| 5sealed | 558 | Seiter, Florian (1666) | Won 2-1 | +211527 |
| 6sealed | 539 | Franco Junior, Cassiano (1626) | Lost 0-2 | -161511 |
| 7sealed | 574 | Janik, Maciej (1660) | Won 2-0 | +201531 |
| 8sealed | 563 | Miller, Jan (1606) | Lost 0-2 | -161515 |
| average opponent: 1599record: 5-3 | new rating: 1515 | |||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 703 | Kunz, Ernst (1523) | Lost 1-2 | -181482 |
| 2sealed | 730 | Regent, Iztok (1483) | Lost 0-2 | -181464 |
| 4sealed | 823 | Rybar, Jiri (1481) | Won 2-1 | +191483 |
| 5sealed | 757 | Berger, Simon (1467) | Lost 0-2 | -191464 |
| 6sealed | 740 | Princ, Lukas (1479) | Lost 1-2 | -171447 |
| 7sealed | 740 | Hochbegger, Stefan (1463) | Lost 1-2 | -181429 |
| 8sealed | 695 | Vaclavik, Petr (1445) | Won 2-0 | +181447 |
| 9sealed | 648 | Voigt, Lars (1445) | Won 2-1 | +181465 |
| average opponent: 1473record: 3-5 | new rating: 1465 | |||