Helmersson, Petter
Current rating: 1530
Record: 13-12
| Grand Prix Gothenburg 2013 (DGM limited) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 308 | Beduzzi, David (1673) | Won 2-1 | +211513 |
| 2sealed | 11 | Linusson, Henrik (1518) | Lost 0-2 | -181495 |
| 3sealed | 325 | Hermansson, Jonathan (1435) | Won 2-0 | +171512 |
| 4sealed | 206 | Saul, Philip (1433) | Won 2-1 | +171529 |
| 5sealed | 213 | Bagge Johansson, Henrik (1537) | Lost 0-2 | -181511 |
| 6sealed | 230 | Shen, Hai Wei (1510) | Won 2-1 | +181529 |
| 7sealed | 182 | Crook, Claude (1505) | Won 2-1 | +171546 |
| 8sealed | 78 | Messow, Philip (1625) | Lost 0-2 | -161530 |
| top | average opponent: 1529record: 5-3 | new rating: 1530 | ||
| Grand Prix London 2011 (MBS limited) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 231 | Withers, Mark (1500) | Won 2-1 | +181525 |
| 2sealed | 262 | Alfayate, Jose Antonio (1625) | Lost 1-2 | -161509 |
| 3sealed | 269 | Hows, Tim (1548) | Lost 0-2 | -171492 |
| 4sealed | 354 | Green, Oliver (1483) | Won 2-1 | +171509 |
| 5sealed | 293 | Kogan, Alexander (1539) | Lost 1-2 | -171492 |
| top | average opponent: 1539record: 2-3 | new rating: 1492 | ||
| Grand Prix Gothenburg 2010 (M11 limited) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 597 | Vache, Alexandre (1446) | Won 2-0 | +171518 |
| 2sealed | 539 | Carlsson, Per (1518) | Lost 0-2 | -181500 |
| 3sealed | 629 | Bylund, Mikael L (1500) | Won 2-0 | +181518 |
| 4sealed | 618 | Christensson, Thommy (1414) | Lost 1-2 | -201498 |
| 5sealed | 674 | Van Goethem, Stijn (1771) | Won 2-0 | +231521 |
| 6sealed | 612 | Kunzler, Matthias (1758) | Lost 1-2 | -141507 |
| top | average opponent: 1568record: 3-3 | new rating: 1507 | ||
| Grand Prix Copenhagen 2008 (EVE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 112 | Sjodahl, Gottfrid (1500) | Lost 1-2 | -181482 |
| 2standard | 160 | Febaek, Phillip (1482) | Won 2-0 | +181500 |
| 3standard | 113 | Gudmundsson, Finnbogi (1500) | Lost 0-2 | -181482 |
| 4standard | 245 | Svendsen, Soren (1531) | Won 2-1 | +191501 |
| 5standard | 163 | Tremyr, Morten (1501) | Won 2-1 | +181519 |
| 6standard | 153 | Christensen, Philip (1522) | Lost 1-2 | -181501 |
| top | average opponent: 1506record: 3-3 | new rating: 1501 | ||