ritterbeck, john
Current rating: 1516
Record: 2-1-2
| Grand Prix Columbus 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 113 | Sellers, David (1452) | Won 2-1 | +171517 |
| 2sealed | 190 | Peters, Jeff (1496) | Draw 1-1 | 01517 |
| 3sealed | 142 | Walat, Cody (1518) | Draw 1-1 | 01517 |
| 4sealed | 253 | Etter, Grett (1500) | Won 2-0 | +171534 |
| 5sealed | 173 | Chadha, Carlos (1514) | Lost 1-2 | -181516 |
| average opponent: 1496record: 2-1-2 | new rating: 1516 | |||