Kahl, William
Current rating: 1430
Record: 3-7-1
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 188 | Jette, Francis (1561) | Lost 0-2 | -171465 |
| 2legacy | 530 | Hernandez, Kevin (1429) | Draw 1-1 | 01465 |
| 3legacy | 680 | Kogan, Mark (1464) | Lost 0-2 | -181447 |
| 4legacy | 782 | Sorensen, Nicholas (1445) | Lost 0-2 | -181429 |
| 5legacy | 742 | Smale, Harlie (1446) | Won 2-0 | +181447 |
| 6legacy | 645 | Schiren, Bryan (1482) | Won 2-1 | +191466 |
| 7legacy | 522 | Fehon, Jeremy (1448) | Lost 0-2 | -191447 |
| 8legacy | 226 | Sowar, Eli (1462) | Lost 0-2 | -171430 |
| average opponent: 1467record: 2-5-1 | new rating: 1430 | |||
| Grand Prix Philadelphia 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 41 | Brackin, John (1500) | Won 0-0 | +181518 |
| 2extended | 95 | Stavola, Kate (1518) | Lost 0-0 | -181500 |
| 3extended | 177 | Mead, Hank (1500) | Lost 0-0 | -181482 |
| average opponent: 1506record: 1-2 | new rating: 1482 | |||