Slack, Jonathan
Current rating: 1443
Record: 7-10
| Grand Prix Columbus 2010 (legacy) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 164 | French, Matt (1500) | Lost 1-2 | -181478 |
| 2legacy | 229 | Keener, Christopher P (1464) | Won 2-1 | +181496 |
| 3legacy | 177 | Learnihan-Sylvester, Sean (1500) | Won 2-0 | +181514 |
| 4legacy | 153 | Cline, Matthew (1573) | Lost 0-2 | -171497 |
| 5legacy | 175 | Grella, Drew P (1503) | Lost 1-2 | -181479 |
| 6legacy | 208 | Magooch, Paul M (1500) | Won 2-0 | +191498 |
| 7legacy | 137 | Cruz, Joseph M (1484) | Lost 0-2 | -181480 |
| 8legacy | 118 | Murray, Jeffrey (1480) | Lost 1-2 | -181462 |
| 9legacy | 99 | Nemeth, Brett (1452) | Lost 0-2 | -191443 |
| average opponent: 1495record: 3-6 | new rating: 1443 | |||
| Grand Prix Birmingham 2008 (Lorwyn block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 23 | Kelterbaum, Morgane (1218) | Lost 1-2 | -231477 |
| 2block | 177 | Richardson, Paul M (1484) | Lost 0-2 | -181459 |
| 3block | 249 | McGovern, Mark (1549) | Lost 0-2 | -161443 |
| 4block | 266 | Washington, Bully (1447) | Won 2-1 | +181461 |
| 5block | 239 | Mcgrady, Rachel (1465) | Won 2-0 | +181479 |
| 6block | 182 | Cervera, Natalia (1481) | Won 0-0 | +181497 |
| 7block | 149 | Smith, Phil [ENG] (1503) | Won 2-1 | +181515 |
| 8block | 104 | O'Connell, Bernard (1474) | Lost 0-2 | -191496 |
| average opponent: 1453record: 4-4 | new rating: 1496 | |||