Vajda, Derek
Current rating: 1599
Record: 22-16-1
| Grand Prix Portland 2018 (modern) | starting rating: 1589 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 623 | Stone, Shawn (1500) | Lost 0-2 | -201569 |
| 2modern | 569 | Ballance, Everett (1484) | Won 2-0 | +171586 |
| 3modern | 614 | Kanger, Kristopher (1420) | Won 2-1 | +151601 |
| 4modern | 206 | Hiramoto, Brent (1455) | Won 2-1 | +151616 |
| 5modern | 196 | Thompson, Taylor (1529) | Lost 0-2 | -191597 |
| 6modern | 395 | Byun, Chong (1744) | Won 2-1 | +201617 |
| 7modern | 229 | Nunez, Andres (1589) | Lost 1-2 | -181599 |
| top | average opponent: 1532record: 4-3 | new rating: 1599 | ||
| Grand Prix Seattle 2018 (standard) (RIX standard) | starting rating: 1598 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 32 | Bortoletto, Aaron (1490) | Won 2-0 | +161614 |
| 2standard | 21 | Adepoju, Titus (1528) | Won 2-1 | +171631 |
| 3standard | 92 | Gittin, David (1503) | Lost 0-2 | -211610 |
| 4standard | 326 | Freedman, Henry (1748) | Lost 0-2 | -151595 |
| 5standard | 511 | Guggemos, Jim (1425) | Won 2-0 | +151610 |
| 6standard | 280 | Matveenko, Oleg (1517) | Won 2-1 | +161626 |
| 7standard | 157 | Smith, Christopher (1717) | Lost 0-2 | -161610 |
| 8standard | 265 | Kittinger, Joel (1449) | Lost 0-2 | -211589 |
| top | average opponent: 1547record: 4-4 | new rating: 1589 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 531 | Fein, Nicholas (1500) | Lost 0-2 | -181481 |
| 2standard | 477 | Schofield, Justin (1454) | Won 2-0 | +171498 |
| 3standard | 412 | Early, Jared (1501) | Lost 1-2 | -181480 |
| 4standard | 704 | Shockey, Bradley (1479) | Won 2-0 | +181498 |
| 5standard | 562 | Van Deurs, Ralph (1501) | Won 2-0 | +181516 |
| 6standard | 229 | Hassler, Brendan (1521) | Won 2-1 | +181534 |
| 7standard | 164 | Adepoju, Titus (1489) | Won 2-1 | +181552 |
| 8standard | 101 | Xu, Tianhao (1558) | Won 2-1 | +181570 |
| 9standard | 99 | Jen, Ivan (1845) | Won 2-0 | +231593 |
| 10standard | 35 | Jacobson, Mark (1928) | Won 2-1 | +241617 |
| 11standard | 23 | Figgins, Devin (1621) | Lost 0-2 | -181599 |
| 12standard | 47 | Chambers, Colron (1478) | Won 2-1 | +151614 |
| 13standard | 39 | Bedell, Rodney (1634) | Lost 0-2 | -171597 |
| 14standard | 65 | Reardon, Thomas (1705) | Lost 1-2 | -161581 |
| 15standard | 102 | Osorio, Abel (1558) | Won 2-1 | +171598 |
| top | average opponent: 1585record: 10-5 | new rating: 1598 | ||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 200 | Follett, Alexander (1500) | Won 2-0 | +181518 |
| 2standard | 212 | Bishop, Will (1518) | Lost 1-2 | -181500 |
| 3standard | 590 | Lisa, Steven (1502) | Lost 0-2 | -181482 |
| 4standard | 546 | Tao, Harry (1482) | Draw 1-1 | 01482 |
| 5standard | 617 | Urasky, Bryan (1486) | Won 2-0 | +181500 |
| 6standard | 476 | Cooper, Christopher (1425) | Won 2-0 | +171517 |
| 7standard | 337 | McClintic, Dubbz (1516) | Lost 0-2 | -181499 |
| 8standard | 421 | Linder, Jerry (1499) | Lost 0-2 | -181481 |
| 9standard | 392 | Taylor, Max (1482) | Won 0-0 | +181499 |
| top | average opponent: 1490record: 4-4-1 | new rating: 1499 | ||