Jerrewing, Mattias
Current rating: 1531
| Grand Prix Gothenburg 2001 (PLS limited) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 113 | Vesterback, Joni (1519) | Lost 0-2 | -171453 |
| 2sealed | 188 | Norgaard, Lasse (1480) | Won 2-1 | +191472 |
| 3sealed | 142 | Kure, Kristian (1499) | Won 2-0 | +181490 |
| 4sealed | 74 | Bailadeira, Filipe (1506) | Lost 1-2 | -181472 |
| 5sealed | 149 | Bjuhr, Peter (1499) | Won 2-1 | +191491 |
| 6sealed | 68 | Buene, Oystein (1678) | Won 2-1 | +211512 |
| 7sealed | 45 | Wu, Danny (1536) | Won 2-0 | +191531 |
| top | average opponent: 1531record: 5-2 | new rating: 1531 | ||
| Grand Prix Copenhagen 2000 (PCY limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 35 | Vammen, Jakob (1500) | Lost 1-2 | -181464 |
| 2sealed | 69 | Kalliomaki, Kalle (1500) | Lost 0-2 | -171447 |
| 3sealed | 125 | Norres, Albert (1499) | Lost 0-2 | -171430 |
| 4sealed | 134 | Rommelhoff, Johannes (1430) | Won 2-0 | +181448 |
| 5sealed | 103 | Pedersen, Thomas (1532) | Won 2-1 | +191467 |
| 6sealed | 83 | Thomsen, Casper (1521) | Won 2-0 | +191486 |
| 7sealed | 60 | Witt, Alexander (1586) | Lost 0-2 | -161470 |
| top | average opponent: 1510record: 3-4 | new rating: 1470 | ||
| Grand Prix Oslo 1999 (ULG sealed) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 77 | Ellingvaag, Sondre (1500) | Lost 1-2 | -181482 |
| 2sealed | 103 | Johansen, Arve (1482) | Won 2-0 | +181500 |
| 3sealed | 104 | Henriksen, Geir W (1500) | Lost 0-2 | -181482 |
| 4sealed | 137 | Lind, Mikael (1482) | Lost 1-2 | -181464 |
| 5sealed | 137 | Gammersvik, Oystein (1464) | Won 2-0 | +181482 |
| 6sealed | 106 | Nebel, Erik (1482) | Lost 0-2 | -181464 |
| 7sealed | 113 | Siverstrand, John Anders (1464) | Won 2-0 | +181482 |
| top | average opponent: 1482record: 3-4 | new rating: 1482 | ||