Calculating redraws

[PoBoy321]

So I was playing in a game with a bunch of middle aged men and a good friend of mine who's a great poker player a little while ago when he got into a situation where he held J9 [img]/images/graemlins/diamond.gif[/img] on a T [img]/images/graemlins/diamond.gif[/img]8x 3 [img]/images/graemlins/diamond.gif[/img] board, giving him the OES+FD, he pushed and was called by Q [img]/images/graemlins/diamond.gif[/img]Qx. We were talking about it and he told me that he was a slight favorite, I told him that he was a slight dog, because if he hit a Q on the turn, the other guy could river a full house, if he hit a diamond on the turn, the villain could river a higher flush, and my friend couldn't make a straight flush.

I ran the situation in pokerstove and I was right, but I'm just curious about how you would calculate something like that.