MacLaren, William
Current rating: 1536
Record: 5-3
| Grand Prix Detroit 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 47 | Rowe, Barry (1500) | Lost 1-2 | -181482 |
| 2block | 174 | Andresson, John (1447) | Won 2-0 | +171499 |
| 3block | 128 | Claiborne, Amos (1618) | Lost 0-2 | -151484 |
| 4block | 255 | Johnson, Ryan (1495) | Won 2-0 | +181502 |
| 5block | 152 | Westfall, Robert (1501) | Won 2-0 | +181520 |
| 6block | 109 | Kinney, Jay (1455) | Won 2-0 | +171537 |
| 7block | 101 | Seaverson, Gregg (1512) | Won 2-0 | +171554 |
| 8block | 54 | Pitstick, David (1553) | Lost 0-2 | -181536 |
| average opponent: 1510record: 5-3 | new rating: 1536 | |||