File talk:AB pruning.svg
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The four in the second row from the bottom can prun 7 as well.
I think a less crowded figure would be more useful. This tree seems to rather random and not designed with pedagogical purpuses in mind. --Zslevi (talk) 10:26, 24 March 2009 (UTC)
The way I think it should be:
—Preceding unsigned comment added by Zslevi (talk • contribs) 10:40, 24 March 2009 (UTC)