Petersson, Martin D
Current rating: 1520
Record: 6-5
| Grand Prix Brighton 2009 (M10 limited) | starting rating: 1558 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 126 | De Simone, Michele (1500) | Lost 1-2 | -191539 |
| 2sealed | 257 | Alford, Simon J (1482) | Lost 0-2 | -191520 |
| average opponent: 1491record: 0-2 | new rating: 1520 | |||
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 563 | Greveling, Yehudi (1497) | Won 2-0 | +181518 |
| 2sealed | 540 | Durr-frederiksen, Kenneth (1500) | Lost 0-2 | -181500 |
| 3sealed | 596 | Bombeeck, Inge (1500) | Won 2-0 | +181518 |
| 4sealed | 519 | Hansen, Lasse Vestergaard (1585) | Lost 1-2 | -171501 |
| 5sealed | 576 | Lissens, Gil J (1500) | Won 2-1 | +181519 |
| 6sealed | 570 | Pletzer-Zelgert, Jonathan (1520) | Won 2-0 | +181537 |
| 7sealed | 514 | Stoichkov, Kiril (1504) | Won 2-0 | +171554 |
| 8sealed | 491 | Kanter, Lars (1578) | Won 2-0 | +191573 |
| 9sealed | 444 | Boeken, Noah (1738) | Lost 1-2 | -151558 |
| average opponent: 1547record: 6-3 | new rating: 1558 | |||