Posted 19 May 2007 - 02:57 PM
He's probably on a flush draw, has overs, or has a pp himself. But of course he could be slowplaying a straight or a set. Given your stack, I think you have to push here (any smaller bet is too small or pot-commits you anyway) or check-fold. I'd probably do the latter myself.
ETA: Now that I've read the whole topic, I see that you went for a creative play that hadn't occurred to me--the check/push. If he has nothing (or very little) and he wouldn't have called a push cold, you grabbed yourself some extra chips out of the deal. If he's got a set or a straight you don't lose any more than you would have had you pushed to begin with. If he has diamonds, though, you just set things up so that he has the right odds to call; and if he has something like A9 he will also now likely call where he might have folded had you just pushed the turn straightaway. Six of one and half a dozen of the other, I'd say.
I'll also add that I didn't see in my original answer that you had the double-gutshot. That would make me much less likely to go with the check-fold.