Davis, Josiah A
Current rating: 1510
Record: 8-7
| Grand Prix Minneapolis 2009 (ZEN limited) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 68 | Milligan, Neil S (1518) | Won 2-0 | +171568 |
| 3sealed | 159 | Reed, Kevin (1559) | Won 2-1 | +181586 |
| 4sealed | 5 | Miller, Chris D (1486) | Lost 0-2 | -201566 |
| 5sealed | 150 | Russo, Michael (1535) | Lost 1-2 | -191547 |
| 6sealed | 185 | Gutierrez, Daniel A (1518) | Lost 0-2 | -181529 |
| 7sealed | 246 | Pierce-Ruhland, Jonathan (1500) | Lost 1-2 | -191510 |
| average opponent: 1519record: 2-4 | new rating: 1510 | |||
| Grand Prix Chicago 2009 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 304 | Moore, Matthew D (1500) | Lost 1-2 | -181482 |
| 2legacy | 435 | Smith, John H (1482) | Won 2-0 | +181500 |
| 3legacy | 353 | Kluetz, Ben (1500) | Won 2-1 | +181518 |
| 4legacy | 291 | Haglund, Brendan (1466) | Lost 0-2 | -191499 |
| 5legacy | 295 | Kovacs, Bobby J (1450) | Won 2-0 | +171516 |
| 6legacy | 203 | Witherell, Randal (1434) | Won 2-0 | +171533 |
| 7legacy | 150 | Crider, Greg J (1498) | Won 2-1 | +171550 |
| 8legacy | 151 | Pederson, Geoffery A (1587) | Lost 0-2 | -171533 |
| 9legacy | 123 | Jung, Sang (1522) | Won 2-1 | +181551 |
| average opponent: 1493record: 6-3 | new rating: 1551 | |||