Life In 19x19

Another way to capture the same idea is to define "a stone possesses dame" as "a stone is part of a group that possesses dame", and defining a "group" as "a collection of stones of the same colour and eyes such that they are connected horizontally / vertically to one another", hence counting eyes as ...

I'm moderator-2, just to clarify here. I was basing my comments initially on http://www.cs.cmu.edu/~wjh/go/rules/Japanese.html , which is a translation that uses the term "group". I then went to the original Japanese version of the 1989 rules, and found out it does not talk about "groups", but it ...