Sobel, Joseph A
Current rating: 1488
Record: 5-6
| Grand Prix Baltimore 2012 (DKA standard) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 145 | Bartley, Matthew (1632) | Lost 0-2 | -161486 |
| 2standard | 574 | Johnson, Charles L (1482) | Won 2-1 | +181504 |
| 3standard | 582 | HENRY, RUSTY (1500) | Lost 1-2 | -181486 |
| 4standard | 645 | Falbowski, Shawn (1484) | Won 2-0 | +181504 |
| 5standard | 583 | Spiess, Kurt (1593) | Lost 0-2 | -161488 |
| average opponent: 1538record: 2-3 | new rating: 1488 | |||
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 412 | Spiegl, James (1500) | Won 2-0 | +181518 |
| 2sealed | 456 | Howden, Jason (1551) | Lost 0-2 | -171501 |
| 3sealed | 548 | Keith, Joseph (1509) | Won 2-0 | +181519 |
| 4sealed | 461 | Walsh, Sean L (1543) | Won 2-0 | +181537 |
| 5sealed | 383 | Stolze, Philip (1611) | Lost 0-2 | -161521 |
| 6sealed | 449 | Morton, Daniel (1484) | Lost 0-2 | -191502 |
| average opponent: 1533record: 3-3 | new rating: 1502 | |||