Zheng, David
Current rating: 1578
Record: 11-8
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 25 | Bruce, Jacob (1500) | Won 2-1 | +181500 |
| 3extended | 86 | Carleton-Barnes, Gabriel (1744) | Lost 0-1 | -131487 |
| 4extended | 244 | Neiman, Luis (1513) | Won 2-1 | +181505 |
| 5extended | 160 | Kunkel, Jeremy (1584) | Won 2-0 | +201525 |
| 6extended | 43 | Timmons, Patrick (1552) | Won 2-0 | +181543 |
| 7extended | 44 | Mantey, Tyler (1634) | Lost 1-2 | -161527 |
| 8extended | 84 | Penick, John (1622) | Won 2-1 | +191546 |
| 9extended | 74 | Sim, Andew (1574) | Won 2-0 | +191565 |
| 10extended | 20 | Scott-Vargas, Luis (1920) | Lost 0-2 | -121553 |
| 11extended | 52 | Nicolo, Paul (1602) | Won 2-0 | +191572 |
| 12extended | 25 | Mendonca, Rafael (1749) | Won 2-0 | +211593 |
| 13extended | 27 | Cordell, Kenneth (1612) | Won 2-1 | +191612 |
| 14extended | 14 | Catapano, Michael (1638) | Lost 0-2 | -181594 |
| 15extended | 27 | Calcano, Christian (1688) | Lost 0-2 | -161578 |
| average opponent: 1638record: 9-5 | new rating: 1578 | |||
| Grand Prix Boston 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 154 | Wells, Alex (1500) | Won 2-1 | +181518 |
| 2sealed | 50 | Stoltzfus, Daniel (1519) | Lost 1-2 | -181500 |
| 3sealed | 188 | Torres, Ivan (1503) | Lost 0-2 | -181482 |
| 4sealed | 226 | Smith, Eric (1443) | Won 2-1 | +171499 |
| 5sealed | 179 | Serignese, Paul (1532) | Lost 0-2 | -171482 |
| average opponent: 1499record: 2-3 | new rating: 1482 | |||