Diederich, Alexander
Current rating: 1466
Record: 3-5
| Grand Prix Hanover 2009 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 475 | Wouters, Robin (1453) | Won 2-0 | +171517 |
| 2extended | 509 | Knorr, Sebastian (1703) | Lost 0-2 | -151502 |
| 3extended | 510 | Delandsheere, Pierre (1499) | Lost 0-2 | -181484 |
| 4extended | 592 | Milek, Pantelis (1484) | Won 2-1 | +181502 |
| 5extended | 541 | Vondracek, Zdenek (1558) | Lost 0-2 | -171485 |
| 6extended | 549 | Maisonneuve, Erwan (1393) | Lost 1-2 | -191466 |
| 7extended | 550 | Gentner, Michael (1467) | Lost 1-2 | -181448 |
| 8extended | 534 | Schneider, Siegfried (1444) | Won 2-0 | +181466 |
| average opponent: 1500record: 3-5 | new rating: 1466 | |||