May be good to do search and learn the various systems if you wish to have more complete picture.
e.g. for Bishan Internal Competition
2003 -- 12 players (Round Robin System) -- 11 rounds
2005 -- 16 players (Round Robin System) -- 15 rounds
2006 -- 24 (Round Robin System by standards) -- 3 groups of 8,8,8. 11 rounds in Phases 1 & 2
2007 -- 20 (Round Robin System by standards)-- 4 groups of 4,6,6,4. 8 rounds in Phases 1 & 2
2008 -- 23 (Round Robin System by standards)-- 4 groups of 6,6,5,6. 8 rounds in Phases 1 & 2
2009 -- 25 (Round Robin System by standards)-- 5 groups of 6,4,5,4,6. 8 rounds in Phases 1 & 2
we are using 分级循环赛制 since 2006 so as to reduce the number of rounds when we have more players and not able to use Round Robin System, Furthermore, we prefer players to play with others about the same standards and not all the players in Round Robin System.
Bishan 分级循环赛制
11 rounds -- 7 rounds in Phase 1 and 4 rounds in Phase 2
8 rounds -- 5 rounds in Phase 1 and 3 rounds in Phase 2
in this Bishan 分级循环赛制, you do not face the same player twice, it is a two-level (Phases 1 & 2) 分级循环赛制.
In Phase 2, lower half of Upper groups to play with upper half of Lower groups, all need to play in Phase 2 except the two ends, this is the reason for us to have 6 players each at two ends in Phase 1 so that minimum of 5 rounds for the two ends if they do not need to play in Phase 2 after the reviews of yearly compettions.
Phase 3 is using 擂台赛 concept depending on the ranking results after Phase 2. We may have 分先 in two games if we need to have 擂台赛 for 2009 Bishan Internal Competition in Jan 2010.
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