O'Brien-Walker, Mike
Current rating: 1518
Record: 4-3
| Grand Prix Memphis 1999 (Urza's block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 82 | Markstrom, Roberth (1483) | Lost 0-0 | -181482 |
| 2block | 142 | Sardella, Luke (1483) | Won 0-0 | +181500 |
| 3block | 117 | Lovvorn, Charles (1500) | Lost 0-0 | -181482 |
| 4block | 146 | Schmidt, Matt (1482) | Lost 0-0 | -181464 |
| 5block | 129 | Everitt, Christopher (1464) | Won 0-0 | +181482 |
| 6block | 114 | Taggart, Michael (1482) | Won 0-0 | +181500 |
| 7block | 79 | Hayes, William (1500) | Won 0-0 | +181518 |
| average opponent: 1485record: 4-3 | new rating: 1518 | |||