Zeppenfeld, Douglas
Current rating: 1469
Record: 12-17-1
| Grand Prix Seattle 2019 (MH1 limited) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| B1sealed | 398 | Shorb, Joshua (1500) | Won 2-0 | +181497 |
| B2sealed | 322 | Lopez, Ernesto (1585) | Lost 0-2 | -161481 |
| B3sealed | 279 | Reiser, Michael (1631) | Won 2-1 | +201501 |
| B4sealed | 318 | Holcomb, Ty (1627) | Lost 0-2 | -151486 |
| B5sealed | 374 | Walterman, Austin (1543) | Lost 0-2 | -171469 |
| top | average opponent: 1577record: 2-3 | new rating: 1469 | ||
| Grand Prix Portland 2018 (modern) | starting rating: 1524 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 144 | Smalley, Tyler (1630) | Lost 0-2 | -161508 |
| 4modern | 346 | Nugent, Christopher (1662) | Lost 0-2 | -151493 |
| 5modern | 495 | Tenjum, Andrew (1701) | Lost 0-2 | -141479 |
| top | average opponent: 1664record: 0-3 | new rating: 1479 | ||
| Grand Prix Providence 2018 (M19 standard) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 13 | Valk, Reggie (1525) | Lost 0-2 | -171450 |
| 2standard | 171 | Packard, Nicholas (1420) | Won 2-1 | +181468 |
| 3standard | 270 | Mcmullen, Tyler (1499) | Won 2-1 | +181486 |
| 4standard | 203 | Johnson, Zachary (1640) | Won 2-0 | +211507 |
| 5standard | 124 | Mohammed, Riyad (1585) | Won 2-0 | +201527 |
| 6standard | 66 | Walker, Nathaniel (1851) | Won 2-0 | +231550 |
| 7standard | 26 | Campana, Rubens (1962) | Lost 0-2 | -111539 |
| 8standard | 104 | Nelson, Dan (1697) | Lost 0-2 | -151524 |
| top | average opponent: 1647record: 5-3 | new rating: 1524 | ||
| Grand Prix Seattle 2018 (standard) (RIX standard) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 76 | Monroe, Josh (1594) | Won 2-1 | +211470 |
| 2standard | 262 | Meyer, Mathias (1597) | Won 2-0 | +201490 |
| 3standard | 265 | Irwin, Sean (1577) | Won 2-0 | +191509 |
| 4standard | 131 | Cunningham, Jeff (2005) | Lost 1-2 | -91500 |
| 5standard | 280 | Taverner, Thomas (1601) | Lost 0-2 | -161484 |
| 6standard | 288 | Peterson, Jackson (1451) | Won 2-0 | +171501 |
| 7standard | 201 | Hague, Matt (1562) | Lost 1-2 | -171484 |
| 8standard | 232 | Son, Steven (1548) | Lost 0-2 | -171467 |
| top | average opponent: 1617record: 4-4 | new rating: 1467 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 153 | Padgett, Wade (1500) | Lost 0-2 | -181482 |
| 2standard | 575 | Beckfield, Peter (1659) | Lost 1-2 | -151467 |
| 3standard | 724 | Schmitz, Adam (1463) | Won 2-0 | +181485 |
| 4standard | 669 | Perron, Jason (1482) | Lost 0-2 | -181467 |
| 5standard | 726 | Hankins, Aaron (1463) | Draw 1-1 | 01467 |
| 6standard | 647 | Alexander, Travis (1461) | Lost 0-2 | -181449 |
| top | average opponent: 1505record: 1-4-1 | new rating: 1449 | ||