Katzenbach, Martin
Current rating: 1465
Record: 4-6
| Grand Prix Stuttgart 2007 (LRW limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 34 | Reiter, Gernot (1500) | Won 2-0 | +191500 |
| 2sealed | 52 | Reichel-Dittes, Christopher (1500) | Lost 0-2 | -181482 |
| 3sealed | 117 | Scheerer, Tim (1500) | Won 2-0 | +181500 |
| 4sealed | 133 | Gardner, Daniel J [ENG] (1495) | Lost 0-2 | -181482 |
| 5sealed | 179 | Tarnowski, Rafal (1535) | Lost 0-2 | -171465 |
| average opponent: 1506record: 2-3 | new rating: 1465 | |||
| Grand Prix Dortmund 2006 (GPT limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 9 | Hobrecht, Hendrik (1500) | Won 2-1 | +181518 |
| 2sealed | 46 | Jaeger, Jens (1469) | Lost 0-2 | -191499 |
| 3sealed | 117 | Steinert, Roman (1503) | Lost 0-2 | -181481 |
| 4sealed | 201 | Becker, Ralf (1483) | Won 2-0 | +181499 |
| 5sealed | 125 | Born, Sebastian (1506) | Lost 0-2 | -181481 |
| average opponent: 1492record: 2-3 | new rating: 1481 | |||