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座子制

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座子制是中国古代围棋采用的规则。即在开局前放两黑两白于对角星的位置上,双方在这个基础上开始布局

古代围棋无贴目规则,但使用还子规则。对弈双方认定终局后,将棋盘上己方棋块用自己的子填满,每块活棋保留2只眼,然后计算棋盘上的棋子。获得更多的棋子的一方获胜。

在西藏地区的围棋规则中,有12个座子,黑白各6个棋子。极端情况有全局交叉座子的趣味局面。

中国古棋中,还棋头规则将多块活棋的还子负担稍稍加大。但经过围棋AI的研究,中国古棋规则(还棋头加座子制)下,先手方仍然保有先手优势(中国古谱是白先)。

截至2020年,公开可获得的围棋AI KataGo 给出的公允胜率的贴目数值约在6~7目之间,即3~3.5子。

究其原因是在同样的规则下,白棋并未得到额外的规则优势,如五子棋中的黑禁手规则。

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座子制
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