9 v 2
This hand is a hit at a hi-low index less than +1, double if +1 or greater. I would not be surprised if single deck basic strategy labels this play as a double. This would be because the cards that compose the hard nine must consist of at least one low card (7,2) the other two hands (5,4 and 6,3) consist of two low cards.
I went to wiz of odds, the 1 deck B.S. indicated a double for this play, what do the other two sources say?