Petsonk, Joshua
Current rating: 1511
Record: 15-14-1
| Grand Prix Stockholm 2018 (modern) | starting rating: 1528 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 390 | Zetterlund, Viktor (1470) | Lost 1-2 | -191509 |
| 2modern | 393 | Olsson, Dan (1563) | Draw 1-1 | +11510 |
| 3modern | 531 | Toll Stalbom, David (1432) | Won 2-0 | +171527 |
| 4modern | 422 | Bjorling, Rasmus (1492) | Won 2-0 | +171544 |
| 5modern | 284 | Bohrkircher, Sascha (1589) | Won 2-0 | +191563 |
| 6modern | 176 | Kaupa, Lukas (1713) | Lost 1-2 | -151548 |
| 7modern | 283 | Grahn, Per (1519) | Lost 0-2 | -191529 |
| 8modern | 299 | Kapetanakis, Nasos (1514) | Lost 1-2 | -181511 |
| top | average opponent: 1536record: 3-4-1 | new rating: 1511 | ||
| Grand Prix Copenhagen 2017 (modern) | starting rating: 1515 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 72 | Pedersen, Mads Meyhoff (1500) | Won 2-0 | +171532 |
| 2modern | 97 | Simon, Nils (1627) | Lost 0-2 | -161516 |
| 3modern | 457 | Smithells, Rose (1450) | Lost 0-2 | -191497 |
| 4modern | 747 | Brede, Ronald (1437) | Won 2-1 | +171514 |
| 5modern | 468 | Staples, James (1309) | Won 2-1 | +141528 |
| 6modern | 406 | Domeij, Johan (1469) | Lost 0-2 | -191509 |
| 7modern | 461 | Klein Kiskamp, Peter Jan (1559) | Won 2-1 | +191528 |
| 8modern | 343 | Dahlqvist, Jonas (1539) | Lost 1-2 | -181510 |
| 9modern | 483 | Cortinovis, Pamela (1517) | Won 2-1 | +181528 |
| top | average opponent: 1490record: 5-4 | new rating: 1528 | ||
| Grand Prix Stockholm 2016 (EMN limited) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 348 | Hansson, Alex (1448) | Lost 1-2 | -201536 |
| 2sealed | 304 | Osterberg, William (1428) | Won 2-0 | +161552 |
| 3sealed | 491 | Degenhardt, Michel (1505) | Lost 0-2 | -191533 |
| 4sealed | 419 | Emma, Hassler (1491) | Lost 1-2 | -181515 |
| top | average opponent: 1468record: 1-3 | new rating: 1515 | ||
| Grand Prix Stockholm 2014 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 109 | Skattum Vesteng, (1500) | Won 2-0 | +181518 |
| 2standard | 255 | Kettula, Joel (1517) | Won 2-0 | +181536 |
| 3standard | 187 | Fyssas, Antonis (1674) | Lost 1-2 | -161520 |
| 4standard | 321 | Melin, Elias (1570) | Won 2-1 | +191539 |
| 5standard | 174 | Gronholm, Tuukka (1534) | Won 2-1 | +181557 |
| 6standard | 104 | Schneck, Geoffro (1547) | Lost 1-2 | -181539 |
| 7standard | 59 | Hardstam, Johan (1462) | Lost 0-2 | -191520 |
| 8standard | 180 | Debacker, Nicolas (1548) | Won 2-0 | +181538 |
| 9standard | 155 | Halme, Joonas (1533) | Won 2-0 | +181556 |
| top | average opponent: 1543record: 6-3 | new rating: 1556 | ||