Guo, Yizhen
Current rating: 1428
Record: 5-9
| Grand Prix Hong Kong 2018 (modern) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 184 | Chen, Li (1439) | Lost 1-2 | -181429 |
| 2modern | 211 | Calalay, John Santy (1363) | Lost 1-2 | -191410 |
| 3modern | 398 | Zhang, Renlong (1428) | Won 2-1 | +181428 |
| 4modern | 346 | Yu, Bo (1366) | Lost 0-2 | -191409 |
| 5modern | 347 | So, Paul Richard (1429) | Won 2-0 | +181427 |
| 6modern | 296 | So, Jay (1490) | Won 2-0 | +201447 |
| 7modern | 238 | Soesanto, Michael (1431) | Lost 0-2 | -191428 |
| average opponent: 1421record: 3-4 | new rating: 1428 | |||
| Grand Prix Shanghai 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 222 | Lian, Hai (1503) | Won 2-0 | +181518 |
| 2sealed | 114 | Feng, Yi (1518) | Won 2-1 | +181536 |
| 3sealed | 87 | Schafer, Ross (1588) | Lost 0-2 | -171519 |
| 4sealed | 151 | Mu, Huai yuan (1501) | Lost 0-2 | -181501 |
| 5sealed | 292 | Yang, Yefan (1533) | Lost 1-2 | -181483 |
| 6sealed | 264 | Lu, Liwen (1485) | Lost 0-2 | -181465 |
| 7sealed | 265 | Peng, Tao (1463) | Lost 0-2 | -181447 |
| average opponent: 1513record: 2-5 | new rating: 1447 | |||