Weinstein, Zack
Current rating: 1659
| Grand Prix Montreal 2017 (AKH standard) | starting rating: 1673 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 2074 | Armstrong, James (1455) | Lost 1-2 | -221651 |
| 2standard | 2276 | Burning, Frank (1483) | Won 2-1 | +151666 |
| 3standard | 2357 | Pare, Stephane (1449) | Won 2-1 | +141680 |
| 4standard | 2207 | West, Matthew (1546) | Lost 0-2 | -201660 |
| 5standard | 2286 | Baryluk, Kyle (1550) | Won 2-0 | +161676 |
| 6standard | 2145 | Campo, Terrence (1686) | Lost 1-2 | -181658 |
| 7standard | 2287 | Freedman, Kevin (1703) | Won 2-1 | +191677 |
| 8standard | 2158 | Giles, Devon (1710) | Lost 0-2 | -181659 |
| top | average opponent: 1573record: 4-4 | new rating: 1659 | ||
| Grand Prix Providence 2015 (DTK standard) | starting rating: 1562 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 60 | Audette, Anthony (1500) | Won 2-0 | +161578 |
| 2standard | 224 | Cooney, Michael (1539) | Won 2-0 | +181596 |
| 3standard | 49 | Kassis, Eli (1833) | Lost 1-2 | -141582 |
| 4standard | 304 | O'Connor, Ryan (1494) | Won 2-0 | +161598 |
| 5standard | 165 | Clarke, Cole (1539) | Won 2-1 | +171615 |
| 6standard | 147 | Kastel, Chad (1883) | Won 2-0 | +231638 |
| 7standard | 25 | Jaques, Jordan (1569) | Won 2-1 | +171655 |
| 8standard | 20 | Hinkle, Charles (1839) | Won 2-0 | +211676 |
| 9standard | 18 | Jacobson, Mark (2011) | Lost 0-0 | -121664 |
| 10standard | 445 | Rose, John (1596) | Won 2-0 | +171681 |
| 11standard | 393 | Edel, Willy (1962) | Lost 1-2 | -131668 |
| 12standard | 424 | Tautic, Raymond (1827) | Lost 1-2 | -151653 |
| 13standard | 432 | Lax, Ari (1911) | Won 2-1 | +221675 |
| 14standard | 425 | Rodriguez, Miles (1566) | Lost 0-2 | -201655 |
| 15standard | 431 | Fung, Kenny (1648) | Won 2-0 | +181673 |
| top | average opponent: 1714record: 10-5 | new rating: 1673 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 166 | Rauch, Emmart (1500) | Won 2-0 | +181518 |
| 2modern | 99 | Zhang, Yinan (1517) | Won 2-1 | +181536 |
| 3modern | 182 | Stromley, Michael (1469) | Won 2-0 | +171553 |
| 4modern | 65 | Jarrell, Derek (1584) | Lost 0-2 | -181535 |
| 5modern | 159 | Aldrich, Chad (1601) | Won 2-0 | +201555 |
| 6modern | 88 | Brault, Mathieu (1623) | Lost 0-2 | -171538 |
| 7modern | 168 | Lolos, Arthur (1578) | Won 2-0 | +191557 |
| 8modern | 94 | Huang, Bob (1731) | Won 2-1 | +211578 |
| 9modern | 62 | Macaraeg, Tad (1682) | Lost 0-2 | -161562 |
| top | average opponent: 1587record: 6-3 | new rating: 1562 | ||