Koenig, Mark
Current rating: 1411
Record: 1-6
| Grand Prix Boston 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 185 | DelVecchio, Anthony (1500) | Lost 0-2 | -181482 |
| 2sealed | 179 | Williams, Justin (1485) | Won 2-1 | +181500 |
| 3sealed | 127 | Sheeley, Julianna (1498) | Lost 0-2 | -181482 |
| 4sealed | 209 | Radwan, Nickolas (1482) | Lost 1-2 | -181464 |
| 5sealed | 202 | Chamberlain, Bryan (1498) | Lost 0-2 | -171447 |
| 6sealed | 174 | Howard, Mike (1445) | Lost 0-2 | -181429 |
| 8sealed | 109 | Dart, Michael (1443) | Lost 0-2 | -181411 |
| average opponent: 1479record: 1-6 | new rating: 1411 | |||