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Japanese Rules
    Keywords: Rules

Japanese rules are defined by the Nihon Ki-in:

Japanese rules:


Special Rulings

Because the Japanese rules make use of Territory Scoring, which penalizes plays in your own territory, special rulings have been devised so that a group can be pronounced dead without having to make further plays.

See Bent Four In The Corner for one example.

See also: QuestionAboutJapaneseScoring


BillSpight: The 1949 Japanese rules were widely criticized for its special rulings, which seemed to have an ad hoc character. The 1989 rules were an improvement in the sense that such cases are now decided by method. The drawback is that the method is not easy to understand, and still produces some unexpected and peculiar results.


I am reminded of the following quotation from Tony Hoare:

"There are two ways of constructing a piece of software: One is to make it so simple that there are obviously no errors, and the other is to make it so complicated that there are no obvious errors."

--Matthew Woodcraft



This is a copy of the living page "Japanese Rules" at Sensei's Library.
(C) the Authors, published under the OpenContent License V1.0.