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The situation in go in which immediate recapture of a single stone is forbidden and one must therefore make a threat in order to be allowed to do so. This tag is definitely appropriate to questions about the principles and rules of kos and about a ko in a particular position. For positions that might lead to a ko and positions where a ko is a small part it is probably only useful if the ko plays a significant role.

5 votes

What happens in Go if you "take back" a ko before making a ko threat?

For example, if one player plays an illegal move (like taking back a ko immediately) and the other says "take back your move and let's pretend nothing happened", then so it is: nothing happened. …
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