Sievers, Jeff C
Current rating: 1593
Record: 13-8
| Grand Prix Chicago 2012 (modern) | starting rating: 1623 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 9 | Reilly, Brian (1500) | Lost 0-2 | -211602 |
| 2modern | 323 | VanGilder, Marc (1404) | Won 2-0 | +151617 |
| 3modern | 393 | Stankey, Matt (1500) | Lost 0-2 | -201597 |
| 4modern | 446 | Friend, Korbin (1482) | Won 2-0 | +161613 |
| 5modern | 377 | Ovel, Tylamin (1499) | Lost 0-2 | -201593 |
| average opponent: 1477record: 2-3 | new rating: 1593 | |||
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2 | Mccoy, Robert (1500) | Won 2-1 | +181518 |
| 2sealed | 85 | Butler, Justin A (1517) | Won 2-1 | +181536 |
| 3sealed | 54 | Pavic, Marinko (1559) | Lost 0-2 | -181518 |
| 4sealed | 172 | Kelly, Nathaniel (1384) | Won 2-1 | +161534 |
| 5sealed | 44 | Ochoa, David (1934) | Lost 1-2 | -111523 |
| 6sealed | 121 | Grimer, Curtis J (1503) | Won 2-0 | +181541 |
| 7sealed | 91 | Reinhardt, Adam (1551) | Won 2-1 | +181559 |
| 8sealed | 67 | Gromko, Radoslaw (1629) | Won 2-0 | +191578 |
| 9sealed | 26 | Adam-Boucher, Maxime (1574) | Won 2-0 | +181596 |
| 10sealed | 29 | Hagon, Richard (1532) | Won 2-0 | +171613 |
| 11draft | 54 | Orr, Jim (1731) | Won 2-1 | +201633 |
| 12draft | 3 | Muraca, Nick (1784) | Lost 1-2 | -151618 |
| 13draft | 1 | Brown, Duncan (1551) | Lost 0-2 | -201598 |
| 14draft | 53 | Shapiro, Jeremy (1866) | Lost 0-2 | -131585 |
| 15draft | 15 | Doshi, Vishvas (1630) | Won 2-1 | +191604 |
| 16draft | 24 | Lee, Albert (1634) | Won 2-0 | +191623 |
| average opponent: 1617record: 11-5 | new rating: 1623 | |||