Tang, Johann
Current rating: 1485
| Grand Prix Shanghai 2012 (M13 limited) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 240 | Jiang, Yangmin (1500) | Lost 0-2 | -181501 |
| 2sealed | 305 | Wu, Yiqing (1482) | Won 2-0 | +181519 |
| 3sealed | 186 | Tai, Kei Leung (1676) | Lost 1-2 | -151504 |
| 4sealed | 329 | Li, Xiang 1 (1484) | Lost 0-2 | -191485 |
| top | average opponent: 1536record: 1-3 | new rating: 1485 | ||
| Grand Prix Bochum 2010 (SOM limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 188 | Knab, Martin (1500) | Lost 0-2 | -181481 |
| 2sealed | 310 | Schwan, Niklas (1482) | Won 2-0 | +181499 |
| 3sealed | 189 | Rehfeldt, Stefan (1419) | Won 2-0 | +171516 |
| 4sealed | 248 | Willems, Gert (1521) | Won 2-1 | +181534 |
| 5sealed | 141 | Gardner, Daniel J [ENG] (1749) | Lost 0-2 | -151519 |
| top | average opponent: 1534record: 3-2 | new rating: 1519 | ||
| Grand Prix Paris 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 828 | Van Casteren, Wouter (1465) | Won 2-1 | +171517 |
| 2sealed | 716 | Andre, Stephane (1518) | Draw 1-1 | 01517 |
| 3sealed | 756 | Ullrich, Frank (1581) | Lost 0-2 | -161501 |
| 4sealed | 901 | Pierre, Germain (1467) | Won 2-0 | +171518 |
| 5sealed | 813 | Aime, Alexandre (1472) | Won 2-0 | +171535 |
| 6sealed | 741 | Garnier, Jeremy (1506) | Lost 0-2 | -181517 |
| 7sealed | 803 | Lissens, Gil J (1536) | Lost 1-2 | -181499 |
| top | average opponent: 1506record: 3-3-1 | new rating: 1499 | ||