Forum for Two-eye-formation

First usage of the term [#1615]

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RobertJasiek: First usage of the term (2008-11-05 20:07) [#5247]

I can't remember whether I invented the name. It might have been somebody else. I was the one to create the current, concise, clear definition. I think that Robert Pauli's Logical Japanese Rules of Go use a similar term and that preceded mine. But since I travel tomorrow, I cannot verify this now.

For greedy ancient rules, Berlekamp understood the concept quite some year ago but described it very differently in a way not so useful for go players, especially since those rules are not so popular :)

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HermanHiddema: Benson understood it even earlier (2008-11-07 23:31) [#5252]

Also, as far as I can tell, the two-eye-formation defines a subset of Benson's definition of sets of unconditionally alive chains as given in his 1976 paper, extending the understanding back even further

 
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Forum for Two-eye-formation
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