Williams, Zachary
Current rating: 1457
Record: 14-16-1
| Grand Prix Tampa Bay 2019 (modern) | starting rating: 1474 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 93 | Wojnarski, Ryan (1511) | Won 2-1 | +191493 |
| 2modern | 205 | Carr, Adrian (1547) | Won 2-1 | +191512 |
| 3modern | 31 | Lettieri, Matt (1482) | Lost 1-2 | -191493 |
| 4modern | 239 | Lennon, Christopher (1464) | Lost 1-2 | -191474 |
| 5modern | 240 | Horton, Marshall (1505) | Lost 0-2 | -171457 |
| top | average opponent: 1502record: 2-3 | new rating: 1457 | ||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 48 | Cornejo, Christopher (1545) | Won 2-0 | +181553 |
| 2standard | 317 | Brock, Michael (1405) | Lost 1-2 | -211532 |
| 3standard | 413 | Miller, Max (1446) | Lost 0-2 | -191513 |
| 4standard | 711 | Johnson, Lucas (1430) | Lost 1-2 | -201493 |
| 5standard | 691 | May, Daniel (1428) | Lost 1-2 | -191474 |
| top | average opponent: 1451record: 1-4 | new rating: 1474 | ||
| Grand Prix Orlando 2012 (ISD standard) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 67 | Michael, Stephen O (1500) | Won 2-0 | +181539 |
| 2standard | 29 | Mayor, Richard (1541) | Draw 1-1 | 01539 |
| 3standard | 173 | Lam, Roberto (1500) | Lost 1-2 | -191520 |
| 4standard | 317 | Abreu, Josue (1483) | Won 2-1 | +171537 |
| 5standard | 233 | Loos, Vinnie (1517) | Lost 1-2 | -181519 |
| 6standard | 292 | Jacquet, Christophe (1479) | Won 2-0 | +171536 |
| 7standard | 219 | McGregor, Trevor (1485) | Won 2-1 | +171553 |
| 8standard | 158 | Stechman, Tyler (1523) | Lost 0-2 | -181535 |
| top | average opponent: 1503record: 4-3-1 | new rating: 1535 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 637 | Wood, Joseph (1500) | Won 2-1 | +181499 |
| 2standard | 814 | Terry, Allen (1518) | Won 2-1 | +191518 |
| 3standard | 630 | Shields, Jharick (1452) | Lost 1-2 | -191499 |
| 4standard | 861 | Morley, Jim (1558) | Won 2-1 | +191518 |
| 5standard | 754 | Mylchreest, Spencer (1535) | Won 2-0 | +181536 |
| 6standard | 671 | Adams, Joshua H (1553) | Lost 1-2 | -181518 |
| 7standard | 767 | Money, Kevin (1526) | Won 2-0 | +181536 |
| 8standard | 690 | Moore, John E (1671) | Lost 0-2 | -151521 |
| top | average opponent: 1539record: 5-3 | new rating: 1521 | ||
| Grand Prix Tampa 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 218 | Pruitt, Christopher (1500) | Won 2-0 | +181518 |
| 2sealed | 101 | Bertone, Christopher (1465) | Lost 0-2 | -191499 |
| 3sealed | 308 | Carire, Christopher (1500) | Won 2-1 | +181517 |
| 4sealed | 129 | Seay, Nathan (1517) | Lost 1-2 | -181499 |
| 5sealed | 271 | Bryant, Andrew R (1501) | Lost 0-2 | -181481 |
| top | average opponent: 1497record: 2-3 | new rating: 1481 | ||