A study of Methods used in Singapore Xiangqi Open .....

SIXGA may wish to conduct a review after this 2009 Singapore Open Group B 2nd Season.


Please refer to previous post below : --

Learning from the methods used in the last 5 years .......

http://v15.huasing.org/sForum/bbs.php?B=123_11199095

As indicated previously in Jun 2009, the current 7 + 3 八人淘汰 system has a critical round, i.e. Round 8, to decide all promotion cases and the recent withdrawal of 卷心菜 has generated a number of concerns.

To improve the system further, there are few alternatives : --



(1) 八人双败淘汰 -- 7 + 3 method

for this method, the player with 双败 in the last three rounds not to be promoted, in this case, if someone win with a walkover in Round 8 but having 双败 in Rounds 9 and 10 will not be promoted.

after first round


胜者组 4人 select positions 1, 2, 3 and 5
负者组 4人 select positions 4, 6, 7 and 8


Position and results

1 胜 胜 胜 胜者组
2 胜 胜 负 胜者组
3 胜 负 胜 胜者组
4 负 胜 胜
5 胜 负 负 胜者组
6 负 胜 负
7 负 负 胜
8 负 负 负

and Top 4 are promotion cases.

第三届棋总杯大马象棋精英争霸赛 .......2009年7月24日至26日

争霸赛前三轮双败淘汰赛，至少取得2胜才能踏步四强。

(2) 八人淘汰 -- 7 + 1 Method

If we wish to keep to Round 8 to decide on all promotion cases, then we can consider the method used in 2009 Vietnam Open to decide the ranking positions of 8 players in one round so as to save times for Rounds 9 and 10.


Below is a study of methods used in 2009 Vietnam Xiangqi Open

( 9+2 for Top 4 and 9 + 1 for next 8)

From the ranking list after Round 9 ....... to decide the positions for 5 to 12

the ranking list after Round 9

1 蒋 川
2 张 强
3 阮成保
4 阮黄林

5 赖李兄
6 陈正心
7 柳大华
8 陶高科
9 陈强安
10 阮武军
11 阮陈杜宁
12 蒙世行

Winning in Round 10 can move up maximum of 4 positions, in this case, quite a fair system, i.e. the performance in the past 9 rounds are considered too.


5 赖李兄 (won) -- Position 5
6 陈正心 (won) -- Position 6
7 柳大华 (Position 9)
8 陶高科 (won) -- Position 7
9 陈强安 (Position 10)
10 阮武军 (won) -- Position 8
11 阮陈杜宁 (Position 11)
12 蒙世行 (Position 12)

From this study, 陈强安 lost in Round 10. Right ? Vietnam Website did not show Round 10, 3rd Game etc for him.

May be SIXGA can study this method further for our Singapore Open since we are using 7 + 2 (9 + 2 in this system) for the Top 4, what we really want is also to pick Positions 5 to 8 for the prize giving.

In the knock out system, you need a win to move up, for the Positions 5 to 8 in Vietnam System after 9 rounds, you need a win to stay in the same positions or to move up, this is the reason for 柳大华 to move from Position 7 to Position 9 in Round 10 as he has a lost. this is also the reason for 阮武军 to move from Position 10 to Position 8 in Round 10.

and also 陶高科 from Position 8 to Position 7
陈强安 from Position 9 to Position 10.

For Positions 5 to 12, in all, only Positions 7 to 10 are affected from Round 10.


(3) 9 + 1 method instead of 7 + 3 method

For this method, to use Swiss Pairing for the first 9 rounds for all players, and Round 10 to decide on the final ranking.

either

to decide the final ranking position of Top 8, next 8, next next 8, etc so that all players are still fighting hard in their own range of 8 by using Vietnam 2009 Method (you can only move up maximum of 4 positions in this method for 8 players in one round)

or

Round 10 below as suggested previously :

1 vs 2
3 vs 4
5 vs 6
7 vs 8
9 vs 10
...
..
.

and Top 4 are promotion cases.