Tufford, Zachary
Current rating: 1557
Record: 10-6
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1548 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 210 | Finamore, Timothy (1500) | Won 2-1 | +181566 |
| 3standard | 34 | Looman, Dane (1313) | Won 2-1 | +131579 |
| 4standard | 100 | Meinzer, Joseph (1431) | Won 2-1 | +151594 |
| 5standard | 27 | Pedraglio, Diego (1521) | Lost 0-2 | -191575 |
| 6standard | 105 | Landrigan, Daniel (1560) | Won 2-1 | +181593 |
| 7standard | 85 | McMullen, Levon (1607) | Lost 1-2 | -181575 |
| 8standard | 99 | Kim, Jason (1591) | Lost 1-2 | -181557 |
| average opponent: 1503record: 4-3 | new rating: 1557 | |||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 101 | Karr, Matthew (1500) | Won 2-1 | +181518 |
| 2sealed | 203 | Pearson, Neal (1518) | Won 2-0 | +181536 |
| 3sealed | 18 | Allen, John (1552) | Won 2-1 | +181554 |
| 4sealed | 143 | Brown, Michael (1417) | Won 2-1 | +161570 |
| 5sealed | 62 | Spears, David (1574) | Lost 1-2 | -181552 |
| 6sealed | 103 | Sweeney, Leo (1548) | Won 2-1 | +181570 |
| 7sealed | 37 | Kelly, Frank (1457) | Won 2-0 | +161586 |
| 8sealed | 48 | Brock, Hutch (1612) | Lost 1-2 | -181568 |
| 9sealed | 83 | Yeatin, Matt (1469) | Lost 1-2 | -201548 |
| average opponent: 1516record: 6-3 | new rating: 1548 | |||