Doiel, Zachary
Current rating: 1543
Record: 26-23
| Grand Prix Minneapolis 2019 (modern) | starting rating: 1588 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 27 | Bonse II, Robert (1382) | Won 2-1 | +151603 |
| 2modern | 74 | Caton, Alex (1518) | Lost 0-2 | -201583 |
| 3modern | 289 | Morrow, Jacob (1542) | Lost 0-2 | -191564 |
| 4modern | 336 | Stanek, Sean (1431) | Won 2-0 | +161580 |
| 5modern | 346 | Green, Christopher (1547) | Won 2-0 | +171597 |
| 6modern | 140 | Arnold, Chris (1685) | Lost 1-2 | -161581 |
| 7modern | 213 | Dysthe, Andrew (1503) | Lost 1-2 | -191562 |
| 8modern | 197 | Parshall, Rodney (1541) | Lost 0-2 | -191543 |
| top | average opponent: 1519record: 3-5 | new rating: 1543 | ||
| Grand Prix Portland 2018 (modern) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 518 | McEwen, Logan (1465) | Won 2-0 | +161567 |
| 2modern | 3 | Marshall, Levi (1519) | Won 2-1 | +171584 |
| 3modern | 228 | Marino, Nicholas (1546) | Won 2-0 | +181602 |
| 4modern | 123 | Hardwick, Richard (1717) | Won 2-0 | +201622 |
| 5modern | 35 | Blankenship, David (1691) | Lost 1-2 | -171605 |
| 6modern | 164 | Cortez, Salvador (1513) | Lost 0-2 | -201585 |
| 7modern | 282 | Sullivan, Caleb (1588) | Won 2-0 | +181603 |
| 8modern | 92 | Porchas, Justin (1781) | Lost 0-2 | -151588 |
| top | average opponent: 1603record: 5-3 | new rating: 1588 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 50 | Lund, Kameron (1500) | Lost 0-2 | -191520 |
| 2standard | 491 | Marshbank, Jay (1482) | Lost 0-2 | -191501 |
| 3standard | 697 | Armitage, John (1482) | Won 2-0 | +181519 |
| 4standard | 708 | Gibson, Bradley (1448) | Won 2-1 | +171536 |
| 5standard | 467 | Akers, David (1551) | Lost 1-2 | -181518 |
| 6standard | 544 | Gonzalez, Eliezer (1479) | Won 2-0 | +171535 |
| 7standard | 459 | Crockett, Alex (1496) | Won 2-0 | +181553 |
| 8standard | 274 | Alspach, Matthew (1479) | Won 2-1 | +161569 |
| 9standard | 264 | Skinner-Maginnis, Taurin (1541) | Lost 0-2 | -181551 |
| top | average opponent: 1495record: 5-4 | new rating: 1551 | ||
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 122 | Lounsbury, Tricia (1444) | Won 2-0 | +171536 |
| 2modern | 40 | Venturelli, Davide (1462) | Won 2-1 | +161552 |
| 3modern | 15 | Gaieski, Ethan (1731) | Lost 1-2 | -141538 |
| 4modern | 910 | Guerrero, Michael (1517) | Won 2-0 | +171555 |
| 5modern | 376 | Noine, Kazuhiro (1841) | Won 2-1 | +231578 |
| 6modern | 303 | Lubman, Jacob (1545) | Won 2-1 | +181596 |
| 7modern | 95 | Dash, Joshua (1480) | Won 2-1 | +161612 |
| 8modern | 50 | Feeley, Sam (1567) | Lost 1-2 | -191593 |
| 9modern | 190 | Richards, Ian (1570) | Lost 0-2 | -191574 |
| 10modern | 328 | Outeiral, Anthony (1564) | Lost 0-2 | -181556 |
| 11modern | 390 | Wallace, Adam (1669) | Lost 1-2 | -161540 |
| 12modern | 370 | Phoon, Joey (1494) | Lost 0-2 | -191521 |
| 13modern | 346 | Pimentel, Felipe (1580) | Won 2-1 | +191540 |
| 14modern | 299 | Littles, James (1531) | Won 2-1 | +181558 |
| 15modern | 266 | Sharpe, Richard (1476) | Lost 1-2 | -191539 |
| top | average opponent: 1565record: 8-7 | new rating: 1539 | ||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 560 | Martinez, Jonathan (1523) | Won 2-1 | +181518 |
| 2standard | 236 | Rodriguez, Samuel (1518) | Won 2-0 | +181536 |
| 3standard | 257 | Marchant, Michael (1537) | Lost 1-2 | -181518 |
| 4standard | 459 | Crosby, Brandon (1597) | Lost 1-2 | -161502 |
| 5standard | 447 | Wilson, Dustin (1470) | Won 2-1 | +171519 |
| 6standard | 276 | Perez, Hector (1565) | Won 2-1 | +191538 |
| 7standard | 182 | Jackson, Troy (1471) | Lost 1-2 | -191519 |
| 8standard | 265 | Stephenson, Sean (1542) | Lost 1-2 | -181501 |
| 9standard | 349 | Aubin, Zachary (1482) | Won 0-0 | +181519 |
| top | average opponent: 1523record: 5-4 | new rating: 1519 | ||