Zeffert, Daniel
Current rating: 1592
Record: 22-19
| Grand Prix Pittsburgh 2017 (AER standard) | starting rating: 1590 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 3 | Stokes, Shane (1556) | Won 2-0 | +171607 |
| 3standard | 182 | Schmidt, Alec (1650) | Won 2-1 | +191626 |
| 4standard | 175 | Gross, David (1676) | Lost 1-2 | -171609 |
| 5standard | 165 | Blank, Jonathan (1563) | Won 2-1 | +171626 |
| 6standard | 204 | Endress, Mackenzie (1627) | Won 2-1 | +181644 |
| 7standard | 74 | Giles, Devon (1689) | Lost 0-2 | -171627 |
| 8standard | 86 | Bourgoin, Michael (1572) | Lost 0-2 | -191608 |
| 9standard | 294 | Schilha, Eric (1725) | Lost 0-1 | -161592 |
| top | average opponent: 1632record: 4-4 | new rating: 1592 | ||
| Grand Prix Pittsburgh 2016 (SOI standard) | starting rating: 1564 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 269 | Ruffing, Dan (1519) | Won 2-0 | +171581 |
| 3standard | 23 | Dunkelman, Steven (1487) | Lost 0-2 | -191562 |
| 4standard | 334 | Zamba, Xander (1520) | Won 2-1 | +171579 |
| 5standard | 186 | Casey, Patrick (1553) | Won 2-1 | +171596 |
| 6standard | 157 | Storms, Robert (1456) | Won 2-1 | +161612 |
| 7standard | 47 | Hazen, Jim (1579) | Won 2-1 | +171629 |
| 8standard | 56 | Myatt, Jason (1847) | Lost 1-2 | -141615 |
| 9standard | 123 | Clawson, Brent (1762) | Won 2-0 | +211636 |
| 10standard | 325 | Wong, Gary (1948) | Lost 1-2 | -131623 |
| 11standard | 333 | Wilson, Douglas (1638) | Lost 0-2 | -171606 |
| 12standard | 411 | Erdikbas, Sarp (1545) | Won 2-1 | +161622 |
| 13standard | 332 | Black, Samuel (2000) | Lost 1-2 | -111611 |
| 14standard | 378 | Martin, Andy (1438) | Lost 1-2 | -211590 |
| top | average opponent: 1638record: 7-6 | new rating: 1590 | ||
| Grand Prix Columbus 2016 (legacy) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 350 | Macejka, Larry (1475) | Won 2-1 | +181503 |
| 3legacy | 151 | Allward, David (1515) | Lost 1-2 | -181485 |
| 4legacy | 491 | Tickal, Matthew (1658) | Lost 1-2 | -151470 |
| 5legacy | 648 | Klebba, Byford (1468) | Won 2-1 | +181488 |
| 6legacy | 535 | Walters, William (1701) | Won 2-0 | +221510 |
| 7legacy | 368 | Heroux, Trevor (1553) | Won 2-0 | +181528 |
| 8legacy | 138 | Janow, Timothy (1541) | Lost 1-2 | -171511 |
| 9legacy | 346 | Barton, Ian (1501) | Won 2-1 | +181529 |
| 10legacy | 207 | Boggemes, Kyle (1960) | Lost 1-2 | -111518 |
| 11legacy | 232 | Wilson, Steve (1583) | Won 2-0 | +191537 |
| 12legacy | 143 | Belfatto, Michael (1548) | Won 2-0 | +181555 |
| 13legacy | 128 | Lo, William (1697) | Won 2-1 | +211576 |
| 14legacy | 71 | Merriam, Ross (1931) | Lost 0-2 | -121564 |
| top | average opponent: 1625record: 8-5 | new rating: 1564 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 115 | Clark, Aaron (1509) | Lost 1-2 | -181482 |
| 2modern | 815 | Rubin, Alec (1483) | Lost 1-2 | -181464 |
| 3modern | 1097 | Snowden, Walter (1466) | Won 2-0 | +181482 |
| 4modern | 887 | Malone, Andrew (1581) | Won 2-0 | +201502 |
| 5modern | 761 | Carr, Dustin (1499) | Won 2-1 | +181520 |
| 6modern | 697 | Black, Nathaniel (1515) | Lost 1-2 | -181502 |
| 7modern | 658 | Stratton, Alexander (1548) | Lost 0-2 | -171485 |
| top | average opponent: 1514record: 3-4 | new rating: 1485 | ||