[amoeba]

well I would bet the turn myself giving just the few hands you've given.

just based on the few hands you've posted, villain is capable of calling a raise preflop with non premium hands and showing aggression on th turn but I have not seen him raise preflop with a drawing hand.

So on the turn, I have to figure the ace hit him or he has some sort of made hand based on the few hands I've seen. I would bet the scare card to bluff him off his ace higher kicker.

but after he check raised all in, you called with your A9 so I gotta figure that you thought your A9 was good a nice percentage of the time. This leads me to believe that you have more info on him that allows you to believe his range of hands that got to the turn is much greater than the range I put him on based just on 4 hands.

if you believe he can have air here, then why not check behind on the turn and induce a bluff?

there is no real draw there on the flop and 45 just got there.