Pederson, Geoffery A
Current rating: 1523
Record: 21-19-1
| Grand Prix Kansas City 2011 (NPH limited) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 88 | Lange, Jonathan (1500) | Won 2-1 | +181539 |
| 2sealed | 121 | Sun, Carol (1518) | Won 2-0 | +181557 |
| 3sealed | 58 | Hayes, David (1589) | Lost 1-2 | -181539 |
| 4sealed | 203 | Ratz, Matt A (1615) | Lost 0-2 | -161523 |
| top | average opponent: 1555record: 2-2 | new rating: 1523 | ||
| Grand Prix Providence 2011 (legacy) | starting rating: 1570 | |||
| round | table | opponent (rating) | result | Δrating |
| 4legacy | 2 | Bogner, Ryan (1628) | Lost 0-2 | -171553 |
| 5legacy | 128 | Landale, Tim (1735) | Lost 1-2 | -151538 |
| 6legacy | 113 | Parson, Lukas (1610) | Lost 0-2 | -171521 |
| top | average opponent: 1658record: 0-3 | new rating: 1521 | ||
| Grand Prix Dallas-Fort Worth 2011 (MBS standard) | starting rating: 1579 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 328 | McKenna, Steve (1442) | Lost 0-2 | -211558 |
| 2standard | 415 | Jinemez, Phillip (1482) | Won 2-1 | +171575 |
| 3standard | 279 | Hinton, Alex (1502) | Won 2-1 | +161591 |
| 4standard | 355 | Simpson, Nick (1542) | Lost 0-2 | -191572 |
| 5standard | 343 | Naseef, Joseph (1492) | Won 2-1 | +171589 |
| 6standard | 329 | Rasco, Bryson (1522) | Lost 1-2 | -191570 |
| top | average opponent: 1497record: 3-3 | new rating: 1570 | ||
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1586 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 454 | Soper, Alex (1500) | Won 2-0 | +161602 |
| 2sealed | 504 | Moody, Tyler (1464) | Won 2-0 | +161618 |
| 3sealed | 515 | Morley, Jim (1549) | Lost 0-2 | -191599 |
| 4sealed | 517 | Powers, Michael (1486) | Lost 1-2 | -201579 |
| top | average opponent: 1500record: 2-2 | new rating: 1579 | ||
| Grand Prix Chicago 2009 (legacy) | starting rating: 1591 | |||
| round | table | opponent (rating) | result | Δrating |
| 4legacy | 118 | Platt, Cam (1481) | Won 2-1 | +161607 |
| 5legacy | 25 | Gapinski, John (1610) | Lost 0-2 | -181589 |
| 6legacy | 107 | Magby, Mike (1551) | Lost 0-2 | -191570 |
| 7legacy | 133 | Knappen, Eric (1518) | Won 2-0 | +171587 |
| 8legacy | 151 | Davis, Josiah A (1550) | Won 2-0 | +181605 |
| 9legacy | 81 | Rogerson, Ian (1574) | Lost 0-2 | -191586 |
| top | average opponent: 1547record: 3-3 | new rating: 1586 | ||
| Grand Prix Indianapolis 2008 (SHM limited) | starting rating: 1615 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 43 | Pearce, Matthew (1499) | Lost 0-2 | -211594 |
| 3sealed | 410 | Bonty, Andrew (1500) | Won 2-0 | +171611 |
| 4sealed | 185 | Mcclain, Josh (1500) | Lost 0-2 | -201591 |
| top | average opponent: 1500record: 1-2 | new rating: 1591 | ||
| Grand Prix Columbus 2007 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 55 | Ling, Justin A (1500) | Won 2-1 | +181518 |
| 2legacy | 206 | Davis, Albert (1451) | Won 2-0 | +171535 |
| 3legacy | 91 | Grube, Peter L (1556) | Won 2-0 | +181553 |
| 4legacy | 22 | Prosak, Adam (1670) | Lost 0-2 | -161537 |
| 5legacy | 88 | Ashman, Benji (1590) | Lost 1-2 | -171520 |
| 6legacy | 237 | Palavin, Erik (1518) | Won 2-0 | +181538 |
| 7legacy | 113 | Barfield, Christopher (1535) | Won 2-1 | +181556 |
| 8legacy | 102 | Steele, Derrick (1551) | Won 2-0 | +181574 |
| 9legacy | 64 | Angelo, Joe (1578) | Won 2-0 | +181592 |
| 10legacy | 24 | Bustamante, Analynn (1724) | Won 2-1 | +211613 |
| 11legacy | 22 | Galbiati, Tim (1700) | Lost 1-2 | -171596 |
| 12legacy | 33 | Williams, Erik B (1608) | Draw 1-1 | 01596 |
| 13legacy | 37 | Ragsdale, Adam (1540) | Won 2-1 | +171613 |
| 14legacy | 27 | Gosselin, Christopher (1666) | Won 2-0 | +191632 |
| 15legacy | 18 | Fulop, Brian (1651) | Lost 1-2 | -171615 |
| top | average opponent: 1589record: 10-4-1 | new rating: 1615 | ||