Matson, Peter
Current rating: 1500
Record: 7-7
| Grand Prix Boston 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 49 | Aral, Jason (1500) | Lost 0-2 | -181482 |
| 2sealed | 190 | Stroh, Brian (1482) | Lost 1-2 | -181464 |
| 3sealed | 237 | Race, Allan (1422) | Won 2-0 | +181482 |
| 4sealed | 196 | Thibault, Mark (1483) | Won 2-0 | +181500 |
| 5sealed | 146 | Rookey, Karl (1483) | Lost 1-2 | -191481 |
| 6sealed | 156 | Cataldo, John (1510) | Won 2-1 | +191500 |
| 7sealed | 127 | Lovelett, Shawn (1529) | Lost 0-2 | -181482 |
| 8sealed | 100 | Caldwell, Gregory (1481) | Won 2-1 | +181500 |
| average opponent: 1486record: 4-4 | new rating: 1500 | |||
| Grand Prix Philadelphia 2002 (ONS rochester) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 152 | Gobeyn, Joe (1502) | Won 2-0 | +181518 |
| 2sealed | 131 | Twiefel, Torben (1672) | Lost 0-1 | -151503 |
| 3sealed | 143 | Menard, Chad (1508) | Lost 0-2 | -181485 |
| 4sealed | 203 | Bates, Steven (1483) | Won 2-0 | +181503 |
| 5sealed | 178 | Flick, Michael (1450) | Won 2-0 | +171520 |
| 6sealed | 98 | Horowitz, Steve (1441) | Lost 0-2 | -201500 |
| average opponent: 1509record: 3-3 | new rating: 1500 | |||