[SABR42]

[ QUOTE ]
Is check raising that much very optimal though?

[/ QUOTE ]
I think on the river c/r is optimal.

If I value bet the river, I would expect a ton of 1-pair hands to call me (J-x, T-x, 99, 8-x), putting me on AK.

However, if I check, he will usually bet those 1-pair hands for value because it looks like I don't have anything. I then shove and get more value when they call.

Also, KK and QQ would usually just raise the flop against me and stack off. River raise isn't as big as I made it look like. That bet I made covered him by a lot already...