[calc]

my read is that there is a very good chance AK is good here. I think his most likely holdings are a pair of jacks and a flush draw or a gutshot and flush draw. If he flopped 2 pair or a set why would he check the flop in a 3 way pot on a semi-dangerous board with only a solid player left to act and a calling station yet to be given the opportunity to call?

I would think a good player would disguise the strength of their hand with a continuation style bet in this spot and try to build the pot instead of check raising their opponents off their medium/weak aces. I think its much more likely he's trying to take it down with a hand that needs improvement like JQ or KQ spades.