Sonka, Carl
Current rating: 1448
Record: 4-7-2
| Grand Prix Denver 2011 (MBS limited) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 69 | Pendleton, Travis (1500) | Lost 1-2 | -181485 |
| 2sealed | 144 | Theobald, Joshua (1482) | Lost 1-2 | -181467 |
| 3sealed | 154 | Irwin, Eric (1464) | Won 2-0 | +181485 |
| 4sealed | 171 | Sinnott, Timothy (1448) | Lost 0-2 | -191466 |
| 5sealed | 153 | Moss, Chris (1463) | Lost 0-2 | -181448 |
| average opponent: 1471record: 1-4 | new rating: 1448 | |||
| Grand Prix Denver 2008 (Lorwyn block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 150 | Veggian, Nick (1500) | Lost 1-2 | -181482 |
| 2block | 186 | Sienkiewicz, Daniel (1482) | Draw 1-1 | 01482 |
| 3block | 240 | Mitchell, Branson (1464) | Won 2-0 | +181500 |
| 4block | 204 | Alexander, Dwight (1501) | Won 2-0 | +181518 |
| 5block | 140 | Messick, Ryan (1645) | Lost 0-2 | -161502 |
| 6block | 184 | Duke, David (1501) | Won 2-0 | +181520 |
| 7block | 134 | Strand, Brock A (1518) | Draw 1-1 | 01520 |
| 8block | 133 | Davis, James (1592) | Lost 0-2 | -171503 |
| average opponent: 1525record: 3-3-2 | new rating: 1503 | |||