Ko, Chang Ching
Current rating: 1690
Record: 38-25-4 (GP) / 17-16-1 (professional)
| Grand Prix Taipei 2019 (WAR standard) | starting rating: 1685 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 183 | Wong, Chun On Anson (1500) | Won 2-1 | +141699 |
| 2standard | 138 | Cheng, Ping Hong (1500) | Won 2-0 | +151714 |
| 3standard | 145 | Kounosu, Hiroaki (1080) | Won 2-1 | +81722 |
| 4standard | 122 | Longno, Ian Philip (1506) | Lost 0-2 | -221700 |
| 5standard | 81 | Stone, Andrew (1492) | Won 2-1 | +141714 |
| 6standard | 51 | Hishida, Akinori (1511) | Won 2-0 | +141728 |
| 7standard | 38 | Bang, Sangmun (1519) | Won 2-0 | +151743 |
| 8standard | 47 | Jung, Yong Hyuk (1644) | Lost 0-2 | -201723 |
| 9standard | 96 | Chan, Chi Fong (1679) | Lost 1-2 | -191704 |
| 10standard | 108 | Mak, Wai Hou (1916) | Lost 0-2 | -141690 |
| top | average opponent: 1535record: 6-4 | new rating: 1690 | ||
| Grand Prix Taipei 2014 (M15 limited) | starting rating: 1684 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 374 | Sashida, Tomoro (1371) | Lost 0-2 | -231661 |
| 2sealed | 329 | Lo, Mike (1483) | Won 2-1 | +141675 |
| 3sealed | 288 | Hron, Mike (1838) | Lost 1-2 | -151660 |
| 4sealed | 294 | Chan, Teksang (1486) | Won 2-1 | +151675 |
| 5sealed | 228 | Liu, Hsing (1500) | Won 2-0 | +151690 |
| 6sealed | 189 | Chan, Jacky (1468) | Won 2-0 | +141704 |
| 7sealed | 136 | Yong, Kuo Fung (1641) | Lost 1-2 | -191685 |
| top | average opponent: 1541record: 4-3 | new rating: 1685 | ||
| Grand Prix Taipei 2012 (RTR limited) | starting rating: 1650 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 160 | Lin, Yi-Hsuan (1500) | Won 2-0 | +161666 |
| 2sealed | 144 | Sasaki, Yuusuke (1643) | Won 2-0 | +171683 |
| 3sealed | 109 | Pai, Fu Tzu (1538) | Lost 1-2 | -201663 |
| 4sealed | 163 | Wu, Yao-Ting (1516) | Lost 1-2 | -211642 |
| 5sealed | 186 | Lin, Chen Wei (1500) | Won 2-1 | +151657 |
| 6sealed | 204 | Yang, Jhen-Jhang (1523) | Won 2-1 | +161673 |
| 7sealed | 137 | Wada, Hiroya (1590) | Won 2-0 | +161689 |
| 8sealed | 104 | Liu, Stephen (1551) | Won 2-1 | +161705 |
| 9sealed | 70 | Chn, Lu L (1544) | Lost 0-2 | -211684 |
| top | average opponent: 1545record: 6-3 | new rating: 1684 | ||
| Grand Prix Taipei 2008 (ALA limited) | starting rating: 1638 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 38 | Chou, Chi-Fong (1500) | Won 2-0 | +161654 |
| 3sealed | 16 | Hong, Fei Yeung (1648) | Won 2-0 | +181672 |
| 4sealed | 20 | Fujita, Osamu (1861) | Lost 0-2 | -151657 |
| 5sealed | 44 | Lau, Zhao Zhi (1577) | Won 2-0 | +171674 |
| 6sealed | 26 | Chiu, Chang-Tien (1594) | Lost 0-2 | -201654 |
| 7sealed | 41 | Chin, Chao-Hsia (1558) | Won 2-1 | +161670 |
| 8sealed | 43 | Shu, Ming-Lin (1555) | Lost 1-2 | -201650 |
| top | average opponent: 1613record: 4-3 | new rating: 1650 | ||
| 2007 World Championship (mixed) | starting rating: 1695 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 20 | Wolansky, Steven (1843) | Won 2-0 | +211716 |
| 2standard | 1 | Echeverria Paredes, Jose Luis (1697) | Lost 1-2 | -181698 |
| 3standard | 55 | Kitayama, Masaya (1730) | Lost 1-2 | -181680 |
| 4standard | 123 | Cavaleiro, Pedro (1542) | Lost 1-2 | -201660 |
| 5standard | 149 | Saredo, Adrian (1505) | Won 2-0 | +151675 |
| 6draft | 62 | Camargo, Andres (1407) | Lost 1-2 | -231652 |
| 7draft | 111 | Habiboglu, M. Gokhan (1584) | Lost 0-2 | -191633 |
| 8draft | 172 | Szabo, Andras (1634) | Won 2-1 | +181651 |
| 9draft | 72 | Obradovic, Vladimir (1433) | Lost 1-2 | -221629 |
| 10draft | 66 | Tejero Hernandez, Joaqin (1459) | Won 2-0 | +151644 |
| 11draft | 19 | Szleifer, Gadiel (1638) | Lost 0-2 | -181626 |
| 12legacy | 148 | Pappaterra, Pedro (1521) | Won 2-1 | +161642 |
| 13legacy | 130 | Ishii, Kuniyoshi (1688) | Lost 0-2 | -171625 |
| 14legacy | 135 | Synakh, Kostyantyn (1499) | Lost 0-2 | -211604 |
| 15legacy | 142 | Siira, Erkki (1577) | Won 2-0 | +181622 |
| 16legacy | 134 | Valis, Filip (1535) | Won 2-1 | +161638 |
| top | average opponent: 1581record: 7-9 | new rating: 1638 | ||
| Grand Prix Taipei 2005 (Kamigawa block) | starting rating: 1667 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 28 | Tsai, Homg-Gi (1566) | Lost 0-2 | -201647 |
| 4block | 80 | Kim, Yong-Pil (1518) | Won 2-1 | +161663 |
| 5block | 29 | Chiang, Kang Nien (1723) | Lost 0-2 | -171646 |
| 6block | 73 | Hayashi, Hiroki (1641) | Won 2-0 | +181664 |
| 7block | 46 | Ko, Chiyuan (1544) | Won 2-1 | +161680 |
| 8block | 39 | Wong, Nicholas Jonathan (1665) | Won 2-1 | +181698 |
| 9block | 22 | Toochika, Takayuki (1714) | Won 2-1 | +181716 |
| 10block | 13 | Fang, Deh Li (1565) | Won 2-0 | +151731 |
| 11block | 8 | Jian, Sheng Xiu (1560) | Lost 1-2 | -211710 |
| 12block | 14 | Shimura, Ichirou (1940) | Lost 1-2 | -141696 |
| 13block | 18 | Yu, Pi Hsiang (1540) | Won 2-0 | +151711 |
| 14block | 12 | Law, Albertus Hui Chin (1815) | Lost 0-2 | -161695 |
| top | average opponent: 1649record: 7-5 | new rating: 1695 | ||
| 2003 World Championship (mixed) | starting rating: 1580 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 28 | Jirapongtrakul, Boonchai (1571) | Won 2-0 | +181598 |
| 2standard | 122 | Thoren, Jens (1815) | Lost 0-2 | -141584 |
| 3standard | 110 | Fujita, Osamu (1873) | Lost 1-2 | -131571 |
| 4standard | 72 | Kecojevic, Milutin (1499) | Lost 1-2 | -191552 |
| 5standard | 69 | Saviori, Fabio (1477) | Won 1-0 | +171569 |
| 6standard | 96 | Gaete, Francisco (1433) | Lost 0-2 | -211548 |
| 7rochester | 63 | Cornelissen, Kamiel (2005) | Won 2-1 | +261574 |
| 8rochester | 104 | Ng, Chi Fai (1690) | Won 1-0 | +201594 |
| 9rochester | 81 | Brglez, Andrej (1514) | Won 2-0 | +171611 |
| 10rochester | 14 | Canavesi, Daniele (1621) | Won 2-1 | +181629 |
| 11rochester | 94 | Su, Xu (1566) | Won 2-0 | +171646 |
| 12rochester | 30 | Santin, Andrea (1806) | Lost 1-2 | -151631 |
| 13extended | 21 | Schneider, Justin (1894) | Won 2-0 | +221653 |
| 14extended | 72 | Maher, Bob (2084) | Lost 0-2 | -101643 |
| 15extended | 56 | Lauriol, Sylvain (1790) | Won 2-0 | +201663 |
| 16extended | 26 | Damo da Rosa, Paulo Vitor (1614) | Won 2-0 | +171680 |
| 17extended | 14 | Zajdner, Mark (1841) | Draw 1-1 | +31683 |
| 18extended | 25 | Perala, Jussi (1787) | Lost 0-2 | -161667 |
| top | average opponent: 1716record: 10-7-1 | new rating: 1667 | ||
| Grand Prix Taipei 2002 (JUD standard) | starting rating: 1559 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 16 | Shimada, Masatake (1734) | Won 2-0 | +211580 |
| 4standard | 11 | Bunsongsikul, Ped (1554) | Won 2-0 | +181598 |
| 5standard | 10 | Hwung, Youn Ming (1555) | Won 2-0 | +171615 |
| 6standard | 5 | Tung, Chang-Ming (1539) | Lost 1-2 | -191596 |
| 7standard | 14 | Chun, Bo Ruad (1539) | Draw 1-1 | -11595 |
| 8standard | 12 | Kuo, Tzu-Ching (1653) | Lost 0-2 | -171578 |
| 9standard | 22 | Zhou, Yujian (1761) | Lost 0-2 | -151563 |
| 10standard | 27 | Lee, Yi-Ping (1520) | Draw 1-1 | -11562 |
| 11standard | 28 | Bai, Shan (1490) | Won 2-0 | +171579 |
| 12standard | 23 | Su, Li-Chyun (1531) | Won 2-0 | +171596 |
| 13standard | 18 | Lau, Sam Lei Kang (1727) | Lost 1-2 | -161580 |
| top | average opponent: 1600record: 5-4-2 | new rating: 1580 | ||
| Grand Prix Kaohsiung 2001 (PLS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 1 | Sun, Lucifar (1518) | Won 2-0 | +181518 |
| 4sealed | 14 | Lee, Chia Wen (1519) | Won 2-0 | +181536 |
| 5sealed | 3 | Lee, Jim Tim (1570) | Won 2-1 | +191555 |
| 6sealed | 4 | Tsukamoto, Toshiki (1763) | Won 2-0 | +221577 |
| 7sealed | 3 | Siagian, Yohannes (1589) | Lost 0-2 | -181559 |
| 8draft | 6 | Hoshino, Fumio (1568) | Draw 1-1 | 01559 |
| 9draft | 8 | Chiu, Teng Feng (1571) | Draw 1-1 | 01559 |
| 10draft | 9 | Wang, Ming Chee (1508) | Won 2-0 | +171576 |
| 11draft | 6 | Hwang, Wen Jien (1591) | Lost 0-2 | -171559 |
| 12draft | 9 | Gong, Cheng Yu (1574) | Lost 0-2 | -181541 |
| 13draft | 20 | Hwung, Youn Ming (1557) | Won 2-0 | +181559 |
| top | average opponent: 1575record: 6-3-2 | new rating: 1559 | ||