Lamb, Joshua
Current rating: 1500
Record: 3-3
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 57 | Kemble, Andrew (1500) | Won 2-0 | +181518 |
| 2modern | 422 | Downing, Ian (1454) | Lost 1-2 | -191499 |
| 3modern | 820 | Crawford, Derek (1500) | Won 2-1 | +181517 |
| 4modern | 548 | Lancaster, Casey (1648) | Lost 0-2 | -161501 |
| 5modern | 672 | Bosco, Michael (1487) | Won 2-1 | +181519 |
| 6modern | 442 | Vivian, Zach (1452) | Lost 1-2 | -191500 |
| average opponent: 1507record: 3-3 | new rating: 1500 | |||