O'Brien, Bill
Current rating: 1516
Record: 4-3
| Grand Prix Washington DC 1999 (UDS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 96 | Brady, Alex (1500) | Won 0-0 | +181518 |
| 2sealed | 67 | McGlinchey, Mike (1500) | Lost 0-0 | -181500 |
| 3sealed | 136 | Fizer, John (1501) | Won 0-0 | +181518 |
| 4sealed | 111 | Christensen, Allan (1518) | Won 0-0 | +181536 |
| 5sealed | 85 | May, Darth (1500) | Won 0-0 | +171553 |
| 6sealed | 43 | Sullivan, Robert (1519) | Lost 0-0 | -191534 |
| 7sealed | 63 | Horn, Karl (1486) | Lost 0-0 | -181516 |
| average opponent: 1503record: 4-3 | new rating: 1516 | |||