| | |
| All games with provisionals |
| 3-rd Taiwan Championship (12-13.04.2003)
|
| Chen Ko-Han - Long-Chuan Chen (2077) | won| - | |
| Wei-Yuan Zhen (2193) - Chen Ko-Han | lost| - | |
| Yu Tien-Long (0) - Chen Ko-Han | lost| - | |
| Chen Ko-Han - Chung Chun-Chih (1918) | draw| - | |
| Chen Ko-Han - Nai-yi Huang (1779) | won| - | |
| Rating = (2254*2 + 2077 + 400*(1 - 0)) / (2 + 1) G=2 P=1 | 2254 |
| 8 WC Q-tournament (3-13.08.2003)
|
| Chen Ko-Han - Sakamoto Hiroshi (2239) | won| - | |
| Yamaguchi Yusui (2561) - Chen Ko-Han | won| - | |
| Karlsson Stefan (2436) - Chen Ko-Han | lost| - | |
| Chen Ko-Han - Ishitani Shin-ichi (2396) | lost| - | |
| Chen Ko-Han - Chang Yi-Feng (2303) | won| - | |
| Tarannikov Juri (2479) - Chen Ko-Han | lost| - | |
| Chen Ko-Han - Lents Johann (2180) | won| - | |
| Rating = (2254*2 + 16594 + 400*(4 - 3)) / (2 + 7) G=2 P=1 | 2254 |
| 8 WC B Tournament. (3-12.08.2003)
|
| Oll Aivo (1955) - Chen Ko-Han | won| +3 | |
| Chen Ko-Han - Mitsumori Masao (2302) | lost| -19 | |
| Chen Ko-Han - Purk Andri (1945) | won| +3 | |
| Chen Ko-Han - Ilu Timo (2216) | lost| -22 | |
| Chen Ko-Han - Eibatov Nizami (2272) | won| +12 | |
| Chen Ko-Han - Chang Yi-Feng (2319) | draw| -2 | |
| Chernov Sergey (2226) - Chen Ko-Han | won| +10 | |
| Chen Ko-Han - Makarov Pavel (2426) | won| +19 | |
| Lents Johann (2162) - Chen Ko-Han | lost| -24 | |
| Rating = (2254*2 + 19823 + 400*(5 - 3)) / (2 + 9) G=2 P=1 | 2254 |
| 9th WC Q-tournament (29-31.07.2005)
|
| Chen Ko-Han - Nowakowski Maciej (2144) | won| +7 | |
| Sushkov Vladimir (2488) - Chen Ko-Han | lost| -10 | |
| Chen Ko-Han - Kozhin Mikhail (2437) | won| +20 | |
| Wei-Yuan Cheng (0) - Chen Ko-Han | draw| - | |
| Tarannikov Juri (2372) - Chen Ko-Han | lost| -15 | |
| Chen Ko-Han - Ishitani Shin-ichi (2383) | won| +17 | |
| Purk Andri (2272) - Chen Ko-Han | lost| -20 | |
| 2358 - 2357 |
| 9th WC B Tournament. (1-5.08.2005)
|
| Chen Ko-Han - Tamura Kazumasa (2275) | draw| -4 | |
| Chen Ko-Han - Lind Bjorn (1918) | lost| -30 | |
| Chen Ko-Han - Kubo Izumi (2149) | won| +7 | |
| Chen Ko-Han - Kudomi Takahiro (2256) | won| +11 | |
| Chen Ko-Han - Serdukov Egor (2015) | won| +4 | |
| Chen Ko-Han - Oblikas Mikk (1985) | won| +3 | |
| Chen Ko-Han - Poghosyan Albert (2269) | won| +12 | |
| Chen Ko-Han - Kozhin Mikhail (2377) | won| +17 | |
| Yamaguchi Yusui (2383) - Chen Ko-Han | lost| -15 | |
| 2357 - 2362 |