Chongson, Ian
Current rating: 1537
Record: 5-3
| Grand Prix Columbus 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 92 | Phillips, Paul (1520) | Lost 0-2 | -181482 |
| 2sealed | 305 | Etoll, Nick (1482) | Lost 0-2 | -181464 |
| 3sealed | 366 | Gaudard, Jordan (1464) | Won 2-1 | +181482 |
| 4sealed | 281 | Braswell, Warren (1481) | Won 2-0 | +181500 |
| 5sealed | 194 | Fahey, Sean (1498) | Won 2-0 | +181518 |
| 6sealed | 165 | Klug, Eric (1519) | Lost 1-2 | -181500 |
| 7sealed | 174 | Vlahovich, Dan (1560) | Won 2-0 | +191519 |
| 8sealed | 136 | Gobeyn, Joe (1489) | Won 2-1 | +181537 |
| average opponent: 1501record: 5-3 | new rating: 1537 | |||