: Re: what is "1/2 point"?
(2006-07-27 04:27) [#1959]
Actually, the scores normally add to 361.5 with button go.
The rationale is different, but Ikeda's rule is, in a sense, a form of button go. By adding 1/2 point to White while subtracting 1/2 point from Black, White gains 1 point in terms of the net result.
As games, the button looks like this:
Ikeda's "button" looks like this:
The button is neutral, with a mean score of 0. Ikeda's "button" favors White by 1/2 point. It's a question of adjusting the komi to make them equivalent.
1) Taking the button removes ko or superko bans, which Ikeda's pass, I think, does not.
2) Ikeda focused on the "last competitive move", which he did not have an adequate definition for. He said, "If we can only give a complete definition of the last competitive move, we can claim to have a set of rules that is optimal in both theory and practice."
Button go avoids that difficulty.