Yamaguchi opening rule

Yamaguchi opening rule is a renju opening rule. It was developed by Japanese player Yusui Yamaguchi.

The sequence of moves implied by the rule follows.

This rule is very close to an old RIF opening rule and therefore favorited. It gives an average variety of new playable variants in a good number of openings, but some of them (13ths and some others) don't become playable. More, this opening rule doesn't protect players from a 11D-draw variants.

This opening rule is official opening rule for Renju World Championships and Renju Team World Championships since 2009.

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