Ko, Ronald
Current rating: 1456
Record: 10-13
| Grand Prix Hong Kong 2017 (XLN limited) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 154 | Tang, Ivan (1566) | Lost 0-2 | -161453 |
| 2sealed | 177 | Song, Jinliang (1541) | Won 2-1 | +191472 |
| 3sealed | 286 | De Leon, Romeo (1399) | Won 2-1 | +171489 |
| 4sealed | 225 | Chen, Jiabin (1560) | Lost 0-2 | -171472 |
| 5sealed | 243 | Lee, Wing Tat (1550) | Lost 1-2 | -161456 |
| top | average opponent: 1523record: 2-3 | new rating: 1456 | ||
| Grand Prix Hong Kong 2015 (ORI limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 223 | Choi, Joseph (1500) | Lost 1-2 | -181500 |
| 2sealed | 216 | Lim, Fang Zhen Joseph (1785) | Lost 1-2 | -131487 |
| 3sealed | 397 | Wong, Wai Cheong (1482) | Lost 1-2 | -181469 |
| top | average opponent: 1589record: 0-3 | new rating: 1469 | ||
| Grand Prix Hong Kong 2013 (THS limited) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 143 | Chan, Pok Man (1500) | Won 2-0 | +181521 |
| 2sealed | 4 | Zhang, Jia (1498) | Lost 1-2 | -181503 |
| 3sealed | 331 | Ho, Kin Hei Zen (1503) | Won 2-1 | +181521 |
| 4sealed | 279 | Xu, Fei (1505) | Lost 1-2 | -191502 |
| 5sealed | 292 | Phanpakorn, Dolpipop (1519) | Lost 1-2 | -171485 |
| 6sealed | 331 | Kondo, Hirotsugu (1358) | Won 2-0 | +151500 |
| 7sealed | 266 | Li, Isaiah (1501) | Won 2-0 | +181518 |
| top | average opponent: 1483record: 4-3 | new rating: 1518 | ||
| Grand Prix Hong Kong 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 14 | Cheung, Kee Yin Lawrence (1504) | Won 2-1 | +181518 |
| 2sealed | 36 | Mitsuhashi, Takashi (1607) | Won 2-0 | +201538 |
| 3sealed | 7 | Jung, Ga Ram (1545) | Won 2-1 | +181556 |
| 4sealed | 25 | Li, Qi (1516) | Lost 1-2 | -191537 |
| 5sealed | 60 | Saito, Tomoharu (1644) | Lost 0-0 | -161521 |
| 6sealed | 67 | Jin, Xin (1500) | Won 2-1 | +181539 |
| 7sealed | 48 | Jeong, Hyunwoo (1568) | Lost 1-2 | -181521 |
| 8sealed | 61 | Wong, Hiu Ping (1518) | Lost 0-2 | -181503 |
| top | average opponent: 1550record: 4-4 | new rating: 1503 | ||