Vonholtz, James C
Current rating: 1527
Record: 7-6-1
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1520 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 497 | Shchetinkin, Nickolay (1486) | Won 2-0 | +181538 |
| 3sealed | 456 | Spears, Jimmy (1639) | Lost 0-2 | -161522 |
| 4sealed | 495 | Lanahan, Robert J (1517) | Won 2-1 | +181540 |
| 5sealed | 493 | Solorzano, Fernando (1462) | Won 2-0 | +161556 |
| 6sealed | 432 | Gindy, Charles (1752) | Lost 0-2 | -141542 |
| 7sealed | 469 | Phillips, Cedric (1740) | Lost 0-2 | -151527 |
| average opponent: 1599record: 3-3 | new rating: 1527 | |||
| Grand Prix Indianapolis 2008 (SHM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 259 | Hannum, Eric (1518) | Draw 1-1 | 01500 |
| 3sealed | 200 | Sarna, Thomas (1518) | Won 2-0 | +191519 |
| 4sealed | 128 | White, Aaron (1522) | Won 2-1 | +181537 |
| 5sealed | 65 | Abner, Mike (1555) | Lost 1-2 | -181519 |
| 6sealed | 148 | Valkanas, Andrew (1454) | Won 2-0 | +171536 |
| 7sealed | 93 | Shatford, Walter T (1521) | Lost 1-2 | -181518 |
| 8sealed | 150 | Kosentka, Pawel (1536) | Won 2-0 | +181536 |
| 9sealed | 106 | McDaniel, Chris (1675) | Lost 0-2 | -161520 |
| average opponent: 1537record: 4-3-1 | new rating: 1520 | |||