Marienfeld, Lars
Current rating: 1456
Record: 5-8-1
| Grand Prix Bochum 2012 (RTR standard) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 103 | Wessoly, Thorsten (1500) | Won 2-0 | +181490 |
| 2standard | 79 | Goertzen, Dominik (1466) | Won 2-1 | +181508 |
| 3standard | 119 | Hollmann, Carsten (1584) | Lost 0-2 | -171491 |
| 4standard | 137 | Topler, Michael (1517) | Lost 0-2 | -171474 |
| 5standard | 269 | Neerup, Dennis (1500) | Lost 0-2 | -181456 |
| 6standard | 296 | Materne, Philipp (1504) | Won 2-0 | +191475 |
| 7standard | 245 | Almemo, Fredrik (1422) | Lost 1-2 | -191456 |
| average opponent: 1499record: 3-4 | new rating: 1456 | |||
| Grand Prix Bochum 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 687 | Boruvka, Petr (1607) | Lost 0-2 | -161484 |
| 3sealed | 670 | Hack, Thilo (1500) | Lost 1-2 | -181466 |
| 4sealed | 801 | Kipfstuhl, Peter Vitus (1482) | Draw 1-1 | +11467 |
| 5sealed | 802 | Wiltsch, Martin (1538) | Won 2-0 | +191486 |
| 6sealed | 736 | Libkin, Eugen (1699) | Lost 1-2 | -141472 |
| 7sealed | 702 | Roth, Ingo (1474) | Lost 1-2 | -181454 |
| 8sealed | 653 | Lennhoff, Sebastian (1466) | Won 2-0 | +181472 |
| average opponent: 1538record: 2-4-1 | new rating: 1472 | |||