Yesterday, a revision on Chinese rule was made by the Chinese Weiqi Association, which will come to effect on 1/1/2027 in China. The noticeable change was on komi which is stated in article 9:
第九条 贴先
正式对局由黑方下第一着。为平衡先着之利使对局公平，正式对局要求先行
的黑方作出补偿，称为贴先。正式比赛采用黑方贴还给白方 3.5 子（点），黑棋
总得184 子（点）或白方总得 177子（点）为平局。
在必须分出胜负的比赛中，可以选择以下方式区分胜负，赛事组织者应在竞
赛规程中明确：
（一）平局时，白方胜。
（二）平局时，最先放弃着手一方胜。
Translation by GPT and edited by me:
Article 9 – Compensation for the First Move (Komi)
Black plays the first move in an official game. To balance the advantage of playing first and ensure fairness, Black is required to compensate White. This compensation is referred to as Komi.
In official competitions, Black shall give White a compensation of 3.5 stones [7.0 points]. A total score of 184 points for Black or 177 points for White shall constitute a draw.
In competitions where a decisive result is required, one of the following methods may be adopted to determine the winner. The competition organiser shall specify the method in the competition regulations:
(1) In the event of a draw, White shall be declared the winner.
(2) In the event of a draw, the player who first passes shall be declared the winner.
If we were to use the first method - ie draw means white win under 7.0 point of komi - then is there any special case in which the same game would result in different side winning under this rule and under the old 7.5 komi rule?
Also, side note. Are we able to set these different methods of rules in OGS at the moment? I don’t think we are technically able to do method 2 on OGS yet. Would it be possible to include that in a future update?
Many thanks
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World Mind Sports Games 2008 Rules
[The komi is 6.5.] If White passes first, Black’s score is reduced by 1. If Black
passes first, no such compensation is given.
World Mind Sports Games 2008 Rules
Chinese 2027 Rules Second Draw Option
[The komi is 7.] In the event of a draw, the player who first passes shall be declared the winner.
Chinese 2027 Rules Interpretation
Black passes first equals komi 6.5.
White passes first equals komi 7.5.
The Chinese 2027 Rules’ Second Draw Option equals the World Mind Sports Games 2008 Rules’ first pass compensation.
Therefore, my commentaries apply as to the first pass:
Commentary on the World Mind Sports Games 2008 Rules of Play
Strategy under the World Mind Sports Games Rules of Play
The DeepL translation of the second option is funny:
“In the event of a tie, the player who gives up first wins.”
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