[Danenania]

I bet and call down a checkraise. Whatever he has he's played it very strangely (and badly) so I want to see it. No river card will make me fold.

Also I think you seriously overestimate how often he checkraises based on the results. Him checking this turn with any kind of made hand is awful--he should know you always check behind A-high with your straight outs. So if he's truly a good player I expect this to be either a weird get-to-showdown plan or a multitabling error or even something completely random at least as often as a checkraise attempt. Even more likely still is that he's simply not a very good player.