[jakrpanda]

Any significant bet on the river will put you all-in so imo you have two choices: check/fold or shove on the river.

What would I do? I would check/fold.

The turn bet was pretty large yet he just calls, like he fears nothing. Why? He's displaying strength through his calls so it's either a call bluff (to the river..?) or he's actually got a good hand. I say assume he's rational and lay down the hand when facing a large river bet. How often are we ahead here? If he checks it down then all the better. The pot is a good size.

I have one question though - how did the villain buy in for more than $100 at the .50/$1 level? You said he hasn't made any moves yet he is above $100. What gives?