Wong, Koon Kiu
Current rating: 1558
Record: 21-18 (GP) / 1-5 (professional)
| Grand Prix Hong Kong 2017 (XLN limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 96 | Lau, Zac (1445) | Won 2-0 | +181482 |
| 2sealed | 96 | McKay, Brian (1570) | Won 2-0 | +191501 |
| 3sealed | 59 | Chen, Chin Fung (1536) | Won 2-1 | +191520 |
| 4sealed | 6 | Lai, Pak Yin (1769) | Won 2-1 | +221542 |
| 5sealed | 35 | Chan, Russell (1567) | Lost 1-2 | -171525 |
| 6sealed | 67 | Lee, Farand (1695) | Lost 1-2 | -151510 |
| 7sealed | 118 | Ohki, Tatsuhiko (1700) | Won 2-1 | +211531 |
| 8sealed | 93 | Takeshita, Toru (1756) | Won 2-1 | +221553 |
| 9sealed | 68 | Xu, Ming (1741) | Won 2-1 | +221575 |
| 10draft | 38 | Indrakesuma, Taufik (1826) | Lost 1-2 | -141561 |
| 11draft | 38 | Wee, Pang Ming (1968) | Won 2-1 | +251586 |
| 12draft | 38 | Wong, Brian [HKG] (1556) | Lost 1-2 | -181568 |
| 13draft | 91 | Jeong, Won Jun (1708) | Lost 1-2 | -161552 |
| 14draft | 72 | Che, Ling (1798) | Won 2-0 | +231575 |
| 15draft | 34 | Lu, Liguo (1670) | Lost 0-2 | -171558 |
| top | average opponent: 1687record: 9-6 | new rating: 1558 | ||
| Grand Prix Hong Kong 2013 (THS limited) | starting rating: 1456 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 185 | Gao, Cheng Ming (1500) | Won 2-1 | +191475 |
| 2sealed | 41 | Yun, Hyun-Jun (1481) | Lost 1-2 | -181457 |
| 3sealed | 271 | Mo, Him (1500) | Lost 1-2 | -171440 |
| 4sealed | 332 | Yeung, Yat Ning (1486) | Won 2-0 | +191459 |
| 5sealed | 245 | Li, Isaiah (1503) | Won 2-0 | +191478 |
| 6sealed | 209 | Cheng, Tung-Yi (1723) | Lost 1-2 | -141464 |
| top | average opponent: 1532record: 3-3 | new rating: 1464 | ||
| Pro Tour Gatecrash (GTC standard) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 80 | Gerlock, Alex (1509) | Lost 0-2 | -181491 |
| 2draft | 157 | Griffiths, Pip (1547) | Won 2-0 | +191510 |
| 3draft | 101 | Gatica, Miguel (1867) | Lost 0-2 | -121498 |
| 4standard | 118 | Antunovic, Dado (1509) | Lost 1-2 | -181480 |
| 5standard | 150 | Yukuhiro, Ken (2006) | Lost 0-2 | -91471 |
| 6standard | 145 | Colla, Davide (1665) | Lost 1-2 | -151456 |
| top | average opponent: 1684record: 1-5 | new rating: 1456 | ||
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 37 | Kong, Melinda (1500) | Won 2-0 | +191500 |
| 2sealed | 344 | Neal, Stephen (1660) | Won 2-0 | +211521 |
| 3sealed | 75 | Oleksak, Richard (1606) | Won 2-0 | +191540 |
| 4sealed | 99 | Lin, Le (1604) | Lost 0-2 | -171523 |
| 5sealed | 101 | Brower, Jeremy (1667) | Lost 0-2 | -151508 |
| 6sealed | 289 | Lew, Michael (1533) | Won 2-0 | +181526 |
| 7sealed | 153 | Johnson, Peter A (1531) | Lost 1-2 | -171509 |
| top | average opponent: 1586record: 4-3 | new rating: 1509 | ||
| Grand Prix Seattle 2009 (ARB standard) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 267 | Walsh, Matthew H (1500) | Lost 0-2 | -191500 |
| 2standard | 436 | Martin, Wesley (1482) | Lost 1-2 | -181482 |
| 3standard | 471 | Hilbert, Melinda (1464) | Won 2-0 | +181500 |
| 4standard | 406 | Oxford, Stephen (1481) | Lost 1-2 | -191481 |
| top | average opponent: 1482record: 1-3 | new rating: 1481 | ||
| Grand Prix Vancouver 2008 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 100 | Schwarz, Micheal (1500) | Lost 0-2 | -181482 |
| 2extended | 113 | Conachan, David (1482) | Lost 1-2 | -181464 |
| 3extended | 150 | Lawson, Don (1465) | Won 2-0 | +181482 |
| 4extended | 146 | Garfein, Geoffrey (1425) | Won 2-0 | +171499 |
| 5extended | 129 | Pavic, Marinko (1500) | Won 2-0 | +181517 |
| 6extended | 70 | Dolbeer, Jed (1493) | Won 2-0 | +181535 |
| 7extended | 53 | Szleifer, Gadiel (1654) | Lost 0-2 | -161519 |
| top | average opponent: 1503record: 4-3 | new rating: 1519 | ||