Mentenegro, Oswaldo
Current rating: 1484
Record: 4-5
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 574 | Camporeale, Francesco (1500) | Won 2-0 | +181518 |
| 2sealed | 515 | Hordiienko, Yevhenii (1569) | Lost 1-2 | -171501 |
| 3sealed | 664 | Vojtisek, Michal (1503) | Lost 1-2 | -181483 |
| 4sealed | 798 | Vaclavik, Petr (1480) | Won 2-0 | +181501 |
| 5sealed | 685 | Bures, Marek (1551) | Lost 0-2 | -171484 |
| 6sealed | 755 | Bures, Martin (1482) | Won 2-0 | +181502 |
| 7sealed | 684 | Vogl, Milan (1472) | Won 2-1 | +171519 |
| 8sealed | 655 | Klaue, Alexander (1614) | Lost 1-2 | -161503 |
| 9sealed | 631 | Marous, Roman (1451) | Lost 0-2 | -191484 |
| average opponent: 1514record: 4-5 | new rating: 1484 | |||