One Group Wins
It is a controversial statement to say "The side having only one group wins".
Charles Matthews A contribution towards this debate. In a seminar I attended, Matthew Macfadyen pointed out this dilemma: if you see two groups of your opponent's that can be cut apart, or forced to connect up, what do you do?
How much more is the topic QARTS is supposed to tackle. Anyway, many points even if nothing is killed.
On the other hand,
- in the endgame you probably can't kill any weak group, and attacks are limited in value
The cross-over between the two attitudes could be a sensitive indicator in oyose positions.
Bill: I don't think it's the difference between the phases of the game that matters as much as the question of the weakness of both groups. If both groups are weak then the connection is not going to be a dame. Then splitting will often be better, endgame or no. And if one group is strong, splitting may not gain much, even in the early middle game.
See also Whole Board Connection Theory for an example where one group loses.