分级循环赛曁棋艺水平单一分级制 is a good system ......after we used the system in 2006 (24 players in 3 groups) and 2007 (20 players in 4 groups), we will review and fine tune the system details for future years. So far, we could notice that instead of round robin system for all players (23 or 19 rounds), our players just need to play with those players having about the same level (11 or 8 rounds), Phase 3 擂台赛 will take care of players with too high or too low grouping before the competition started. Furthermore, a 100% participation rate for 20 players over 3 days in this year implies that weekend is still a better period for internal competition as compared to more than 10 wednesdays each in the last three internal competitions although weekday could have more players registered initially.