Ko, Chiyuan
Current rating: 1506
| Grand Prix Shanghai 2014 (KTK limited) | starting rating: 1508 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 141 | Chen, Cheng (1485) | Lost 1-2 | -191489 |
| 2sealed | 355 | Shao, Yunjie (1482) | Won 2-0 | +181507 |
| 3sealed | 355 | Li, Qinghao (1500) | Won 2-1 | +181525 |
| 4sealed | 214 | Jiang, Xipeng (1517) | Lost 1-2 | -181507 |
| 5sealed | 379 | Zhang, Lisha (1491) | Won 2-1 | +181525 |
| 6sealed | 177 | Pan, Minhang (1483) | Lost 1-2 | -191506 |
| top | average opponent: 1493record: 3-3 | new rating: 1506 | ||
| Grand Prix Taipei 2008 (ALA limited) | starting rating: 1546 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 22 | Hsu, Wei Lun (1500) | Won 2-1 | +171563 |
| 2sealed | 53 | Ho, Jong-Yi (1646) | Lost 1-2 | -171546 |
| 3sealed | 69 | Chen, Wei Ben (1536) | Lost 0-2 | -181528 |
| 4sealed | 100 | Wu, Yu Cheng (1482) | Won 2-0 | +171545 |
| 5sealed | 101 | Sakata, Akinori (1472) | Lost 1-2 | -191526 |
| 6sealed | 100 | Gheg, E. Ming (1522) | Lost 1-2 | -181508 |
| top | average opponent: 1526record: 2-4 | new rating: 1508 | ||
| Grand Prix Taipei 2005 (Kamigawa block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 50 | chou, sung-ching (1500) | Won 2-1 | +181518 |
| 2block | 40 | Pai, Bruce (1589) | Won 2-0 | +191537 |
| 3block | 17 | Salvin, Jean Charles (1787) | Won 2-1 | +231560 |
| 4block | 3 | Toochika, Takayuki (1704) | Lost 1-2 | -161544 |
| 5block | 32 | Lin, Yang-How (1541) | Lost 1-2 | -181526 |
| 6block | 66 | Wei, Lily (1519) | Won 2-0 | +181544 |
| 7block | 46 | Ko, Chang Ching (1664) | Lost 1-2 | -161528 |
| 8block | 66 | Go, Paolo (1485) | Won 2-1 | +181546 |
| top | average opponent: 1599record: 5-3 | new rating: 1546 | ||