Hirst, Zach
Current rating: 1616
| Grand Prix San Francisco 2007 (Time Spiral block) | starting rating: 1582 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 138 | King, Kyle (1500) | Won 2-0 | +161598 |
| 2block | 54 | Michaels, Lucas (1571) | Draw 1-1 | 01598 |
| 3block | 96 | Oliver, Ryan (1517) | Won 2-1 | +171615 |
| 4block | 80 | Hoaen, Rich (1933) | Won 2-1 | +231638 |
| 5block | 45 | Bankman-Fried, Sam (1553) | Won 2-1 | +171655 |
| 6block | 23 | Dolbeer, Jed (1472) | Lost 1-2 | -221633 |
| 7block | 65 | Davis, Jim (1677) | Lost 1-2 | -171616 |
| top | average opponent: 1603record: 4-2-1 | new rating: 1616 | ||
| Grand Prix Oakland 2004 (DST limited) | starting rating: 1520 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 74 | Rhodes, Phillip (1500) | Won 2-0 | +171537 |
| 3sealed | 16 | Lee, Eu-Ming (1603) | Lost 0-2 | -161521 |
| 4sealed | 84 | Talim, Gary (1767) | Lost 0-2 | -141507 |
| 5sealed | 148 | Gunter, Chris (1500) | Won 2-0 | +181525 |
| 6sealed | 115 | Saunders, Nathan (1695) | Won 2-1 | +211546 |
| 7sealed | 44 | Schmaltz, Matt (1555) | Won 2-0 | +181564 |
| 8sealed | 46 | Henson, Mike (1561) | Won 2-1 | +181582 |
| top | average opponent: 1597record: 5-2 | new rating: 1582 | ||
| Grand Prix Los Angeles 2002 (ONS rochester) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 43 | Ayala, Hermes (1482) | Won 2-1 | +181518 |
| 2sealed | 16 | Park, John Julius (1518) | Won 2-1 | +181536 |
| 3sealed | 24 | Marat, John (1560) | Lost 0-2 | -181518 |
| 4sealed | 127 | Higa, James (1556) | Won 2-0 | +191537 |
| 5sealed | 61 | Freeman, Ross (1555) | Draw 1-1 | 01537 |
| 6sealed | 71 | Munk, David (1567) | Lost 1-2 | -171520 |
| top | average opponent: 1540record: 3-2-1 | new rating: 1520 | ||