Hi,
his CO-opening-range probably looks smth like this:
22+, A2s+, K7s+, Q8s+, J8s+, T8s+, 97s+, 87s, 76s, A9o+, KTo+, QJo, JTo, T9o
He cbets quite a bit in general, the question is if he'd cbet with pure air here given we don't call superlight vs his CO-range and therefore hit this board quite a bit.
So I'd go with a worst case assumption and assume his range is smth like this:
88+,ATs+,A8s,K8s+,Q8s+,J8s+,T8s+,97s+,87s,Ac9c,Ac7c,Kc7c,Ac6c,7c6c,Ac5c,Ac4c,Ac3c,Ac2c,AJo+,KTo+,QJo
which equals a little bit more than a 60% cbet-range.
Since he gets good odds he probably peels quite a bit of this range (probably even smth like QT), I'd assume he folds smth like AQo though since it has reverse implied odds.
That narrows his callingrange on the flop down to this:
88+,AJs,A8s,K8s+,Q8s+,J8s+,T8s+,98s,87s,AcKc,AcQc,AcTc,Ac9c,Ac7c,Kc7c,9c7c,Ac6c,7c6c,Ac5c,Ac4c,Ac3c,Ac2c,AJo,KTo+,QJo
I agree with pleno to make it bigger in order to set up better stacksizes.
On the turn there are several considerations:
First of all this is a very scary card because it completes all our draws - and we do have quite some draws in our range.
Second however, we do also have a decent amount of bluffs, and we have only few Qx in our checkraisingrange - AQ and KQ are probably the only ones as we don't even call QT preflop.
The question is how we want to construct our bettingrange here, and if we (want to) have a range for giving up - we'd continue most/all bluffs and we'd usually bet the flushes for value, so what's left is Jx and straights.
It's tough to say if he expects us to play them face up, but if we check here IMO he'd take his SD-value/draws to the river by checking back because our range looks so much like Jx and T9.
So the turnbet is good, I also like the sizing.
I have trouble estimating his callingrange on the turn because I'm not sure how good the average reg on NL600 actually is and if most of them would go for another call with TT/99/98/87 here because they have a read or if they'd just fold, or even turn those weak hands into bluffs.
On balance I agree with c/folding and would even go as far as saying that a bet (whether it's a shove or not) is probably -EV because he has quite some nutflushes in his range and would probably even call Khigh flushes.
So the only hands we fold out are lower flushes (probably not more than 5 combos) and perhaps AJ - if he decided not to shove the turn with AJ.
Also if he calls the turn with AJ, he might actually do it with the plan of calling a club river because we'd not turn a Jhigh flush into a bluff and therefore our range contains enough bluffs for him to call.
Weee long post, discuss! ♦