Medford, Zachary
Current rating: 1531
Record: 20-20
| Grand Prix Atlanta 2018 (modern) | starting rating: 1532 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 247 | Rojas, John (1503) | Won 2-0 | +181550 |
| 4modern | 13 | Chung, Jason (2035) | Lost 1-2 | -101540 |
| 5modern | 114 | Houck, Samuel (1475) | Won 2-0 | +171557 |
| 6modern | 184 | Severin, Thoralf (1963) | Lost 1-2 | -111546 |
| 7modern | 239 | Karam, Vinicius (1735) | Lost 0-2 | -151531 |
| top | average opponent: 1742record: 2-3 | new rating: 1531 | ||
| Grand Prix Memphis 2018 (RIX standard) | starting rating: 1593 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 148 | Punzo, Canaan (1519) | Lost 1-2 | -201573 |
| 3standard | 319 | Jones, Edward (1530) | Won 2-1 | +171590 |
| 4standard | 311 | Bentley, Chad (1609) | Lost 0-2 | -171573 |
| 5standard | 338 | Chambers, Colron (1406) | Lost 0-2 | -211552 |
| 6standard | 353 | Trogler, Adrian (1484) | Lost 1-2 | -201532 |
| top | average opponent: 1510record: 1-4 | new rating: 1532 | ||
| Grand Prix Atlanta 2017 (XLN standard) | starting rating: 1547 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 140 | Del Mazo, Mario (1517) | Won 2-0 | +171564 |
| 3standard | 25 | Mears, Brian (1678) | Won 2-1 | +201584 |
| 4standard | 74 | Katine, Josh (1672) | Won 2-1 | +201604 |
| 5standard | 22 | Spano, Greggory (1770) | Lost 0-2 | -151589 |
| 6standard | 74 | Capano, Frank (1416) | Won 2-0 | +151604 |
| 7standard | 100 | Baugh, Jacob (1707) | Won 2-1 | +201624 |
| 8standard | 12 | Walters, Cody (1640) | Won 2-0 | +181642 |
| 9standard | 25 | Bargo, Craig (1661) | Lost 1-2 | -181624 |
| 10standard | 26 | Parker, Anthony (1602) | Lost 1-2 | -181606 |
| 11standard | 96 | Johnson, Patricia (1519) | Won 2-1 | +161622 |
| 12standard | 80 | Fortanely, Bobby (1948) | Lost 1-2 | -121610 |
| 13standard | 90 | Eason, Anthony (1732) | Won 2-1 | +201630 |
| 14standard | 70 | Bitter, Thomas (1565) | Lost 0-2 | -191611 |
| 15standard | 83 | Bishop, Jesse (1576) | Lost 1-2 | -181593 |
| top | average opponent: 1643record: 8-6 | new rating: 1593 | ||
| Grand Prix Atlanta 2016 (KLD limited) | starting rating: 1566 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 869 | Kirkpatrick, Greg (1414) | Won 2-1 | +161582 |
| 3sealed | 529 | Oliver, Neal (1906) | Lost 1-2 | -131569 |
| 4sealed | 869 | Porte, Riley (1524) | Lost 1-2 | -191550 |
| 5sealed | 1116 | Ponton, Sebastien (1488) | Lost 1-2 | -191531 |
| 6sealed | 1100 | Gutermuth, Ken (1456) | Won 2-0 | +171548 |
| 7sealed | 926 | LeMay, Brandon (1512) | Won 2-1 | +171565 |
| 8sealed | 821 | Louie, Justin (1544) | Lost 1-2 | -181547 |
| top | average opponent: 1549record: 3-4 | new rating: 1547 | ||
| Grand Prix Atlanta 2015 (BFZ limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 124 | Cowart, Doug (1500) | Won 2-0 | +181518 |
| 2sealed | 466 | Spears, Nicholas (1523) | Won 2-1 | +181536 |
| 3sealed | 179 | Romero, Michael (1450) | Won 2-1 | +171553 |
| 4sealed | 97 | Boese, Travis (1681) | Lost 1-2 | -161537 |
| 5sealed | 150 | Le-Dang, Tan (1605) | Won 2-0 | +191556 |
| 6sealed | 69 | Kim, Sung 4839 (1553) | Won 2-1 | +181574 |
| 7sealed | 107 | Bergener, Kevin (1570) | Won 2-1 | +181592 |
| 8sealed | 91 | Tan, James (1823) | Lost 0-2 | -141578 |
| 9sealed | 119 | Sui, Xin (1932) | Lost 0-2 | -121566 |
| top | average opponent: 1626record: 6-3 | new rating: 1566 | ||