Wong, Koon Hay
Current rating: 1668
Record: 27-20 (GP) / 8-9-1 (professional)
| Grand Prix Hong Kong 2015 (ORI limited) | starting rating: 1601 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 197 | Lee, Kun-Hsin (1465) | Won 2-0 | +151616 |
| 4sealed | 4 | Yingviriyaprapan, Theeradet (1487) | Won 2-0 | +161632 |
| 5sealed | 11 | Saito, Tomoharu (2053) | Won 2-1 | +251657 |
| 6sealed | 14 | Huang, Yung-Ming (1718) | Lost 1-2 | -171640 |
| 7sealed | 169 | Zhou, Wenbo (1544) | Lost 1-2 | -191621 |
| 8sealed | 72 | Wei, Yifan (1886) | Won 2-1 | +221643 |
| 9sealed | 26 | Fung, Mike (1543) | Won 2-1 | +171660 |
| 10draft | 8 | Xu, Ming (1731) | Lost 1-2 | -171643 |
| 11draft | 24 | Yan, Gan (1694) | Won 2-1 | +191662 |
| 12draft | 36 | Tai, Kei Leung (1830) | Won 2-1 | +211683 |
| 13draft | 34 | Huang, Yung-Ming (1728) | Won 2-1 | +191702 |
| 14draft | 44 | Kwok, Gavin (1714) | Lost 0-2 | -181684 |
| 15draft | 19 | Huang, Yu Chung (1810) | Lost 1-2 | -161668 |
| top | average opponent: 1708record: 8-5 | new rating: 1668 | ||
| Grand Prix Hong Kong 2013 (THS limited) | starting rating: 1568 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 245 | Liu, Xi Yuan Hos (1500) | Lost 0-2 | -191549 |
| 2sealed | 247 | Deng, Shengkeng (1483) | Won 2-0 | +171566 |
| 3sealed | 304 | Lain, Jang-Hung (1699) | Lost 1-2 | -161550 |
| 4sealed | 340 | Chiem, So Man (1481) | Won 2-1 | +171567 |
| 5sealed | 282 | Yu, Nigal (1486) | Won 2-0 | +171584 |
| 6sealed | 275 | Ma, Francis Tsz Lung (1520) | Won 2-0 | +161600 |
| 7sealed | 139 | NG, POK PONG (1536) | Won 2-0 | +171617 |
| 8sealed | 136 | Sato, Rei (1712) | Lost 1-2 | -161601 |
| top | average opponent: 1552record: 5-3 | new rating: 1601 | ||
| Grand Prix Shanghai 2011 (M12 limited) | starting rating: 1533 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 13 | Wang, Zhijia (1518) | Won 2-0 | +171550 |
| 3sealed | 3 | Chen, Shi (1536) | Won 2-0 | +181568 |
| 4sealed | 9 | Lui, Louis (1554) | Won 2-0 | +181586 |
| 5sealed | 38 | Sui, Xin (1669) | Lost 0-2 | -171569 |
| 6sealed | 73 | Hong, Cangtao (1553) | Won 2-0 | +181587 |
| 7sealed | 20 | Suzuki, Shoichi (1556) | Lost 1-2 | -191568 |
| 8sealed | 75 | Tai, Kei Leung (1607) | Lost 0-2 | -171551 |
| 9sealed | 83 | Bai, Jianchun (1504) | Won 2-1 | +171568 |
| top | average opponent: 1562record: 5-3 | new rating: 1568 | ||
| 2006 World Championship (mixed) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 92 | Ishida, Itaru (1760) | Lost 0-2 | -141507 |
| 2standard | 149 | Camargo, Andres (1463) | Won 2-1 | +181525 |
| 3standard | 119 | Salemi, Claudio (1574) | Lost 1-2 | -171508 |
| 4standard | 114 | Popovic, Filip (1513) | Won 2-1 | +181526 |
| 5standard | 109 | Fuentes Lopez, Mario J (1502) | Won 2-1 | +171543 |
| 6standard | 56 | Lebedowicz, Osyp (1818) | Lost 1-2 | -131530 |
| 7draft | 143 | Chiera, Luca (1560) | Won 2-1 | +191549 |
| 8draft | 10 | Fujita, Osamu (1898) | Lost 1-2 | -121537 |
| 9draft | 89 | Mitamura, Kazuya (1753) | Lost 1-2 | -141523 |
| 10draft | 87 | Walls, Gabe (1822) | Lost 1-2 | -131510 |
| 11draft | 55 | Camara, Aristides (1528) | Lost 1-2 | -181492 |
| 12draft | 93 | Jaro, Ogie (1471) | Won 2-1 | +181510 |
| 13extended | 125 | Laycock, Kerel (1465) | Draw 1-1 | -11509 |
| 14extended | 121 | Bandou, Junichirou (1667) | Won 1-0 | +211530 |
| 15extended | 99 | Perez, Andres E (1529) | Lost 0-2 | -181512 |
| 16extended | 116 | Piechnick, Daniel (1500) | Won 2-0 | +181530 |
| 17extended | 102 | Dominguez, Javier (1725) | Lost 1-2 | -151515 |
| 18extended | 110 | Marosan, Dragan (1482) | Won 2-1 | +181533 |
| top | average opponent: 1613record: 8-9-1 | new rating: 1533 | ||
| Grand Prix Hong Kong 2004 (DST limited) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 36 | Schlatter, Urs (1539) | Lost 1-2 | -171487 |
| 4sealed | 68 | Ibamoto, Masami (1714) | Won 2-0 | +221509 |
| 5sealed | 58 | Lee, Sang-Ryeol (1697) | Won 0-0 | +221531 |
| 6sealed | 42 | Fujita, Osamu (2009) | Lost 0-2 | -101521 |
| 7sealed | 50 | Ho, Chee-yin (1501) | Won 2-0 | +171538 |
| 8sealed | 21 | Wong, Nicholas Jonathan (1589) | Lost 0-2 | -171521 |
| top | average opponent: 1675record: 3-3 | new rating: 1521 | ||
| Grand Prix Hong Kong 2001 (ODY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 38 | Chau, Yi (1500) | Won 2-0 | +181518 |
| 2sealed | 35 | Niwa, Takashi (1519) | Won 1-0 | +181536 |
| 3sealed | 1 | Kin, Li Siu (1536) | Won 2-1 | +181554 |
| 4sealed | 22 | Paculio, DJonathan (1535) | Lost 1-2 | -181536 |
| 5sealed | 45 | Chua, Chang (1568) | Won 2-1 | +181554 |
| 6sealed | 16 | Nakamura, Shuhei (1796) | Lost 0-2 | -131541 |
| 7rochester | 1 | Higaki, Takao (1788) | Lost 0-2 | -141527 |
| 8rochester | 7 | Sun, Lucifar (1473) | Lost 1-2 | -191508 |
| 9rochester | 31 | Wang, Yan (1457) | Won 2-1 | +171525 |
| 10rochester | 19 | Chung, Li Siu (1431) | Won 2-0 | +161541 |
| 11rochester | 20 | Eurkittiroj, Arthit (1456) | Lost 1-2 | -191522 |
| 12rochester | 28 | Chiang, Kang Nien (1555) | Lost 0-2 | -181504 |
| top | average opponent: 1551record: 6-6 | new rating: 1504 | ||