It’s funny that most of the comments/responses are geared towards OP’s bet on the river as opposed to what to do now that he’s been check raised and needs to be right 40% of the time for this to be profitable.
I’m not a fan of the river bet if we know the villain is a good player because he can either fold a worse hand or check raise. Usually don’t think it’s a +EV move
As for what to do now, I️ think there’s two main possibilities. He has A6 or K6, something super strong or he’s bluffing. There are some other important hands to consider - QJ, AQ (for value; but I️ think this would be a weird play). 22-TT (turning a hand into a bluff). 77 should be on the radar but that’s monster-hunting.
I️ really feel like he’s making a play here. The size of the raise shows he’s either going for value or trying to maximize his fold equity. And if he’s a good player, and he has a great hand, he’s going to WANT you to call with AQ when he has trip 6’s. I️t is a great raise for maximal value but I️t just seems suspicious. Check/call, check, check/big raise.
There are so many hands he can be doing this with that you beat. You are also blocking a queen. Furthermore, the board is dry and a board pair which mobilizing bluff oriented thinking. Sack up and make the call!
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