One line from Harrington's book, which obviously makes a lot of sense, is that you should put opponents on ranges before the flop comes. The idea being that if you think out their range ahead of time it makes scare cards much less scary.

But on the flip side it also seems unwise to say "villain didn't 3-bet pre-flop therefore he can't have a pair of 9's or higher." That just seems like the kind of mentality that will win small amounts some of the time but lose far more when stacks get shipped.

I'm guessing that the need to re-evaluate villains range is more likely when facing a large raise on an unusual board such as monotone or even 3-of-a-kind. (There's a post in the GTO forum about an AAA board that got me thinking about this.)

So I know the question is vague but what are some hints or guidelines that should trigger a re-evaluation of villain's range? Or is it better to just stick to our pre-flop evaluation of their range?

Also I don't want to be the author of every post in the beginner's forum so some unrelated questions:

I was in a situation playing live where a villain that appeared to be a recreational player ($100-$200 in front of him) and had not played many hands in the previous two hours or gotten out of line at all shoved all-in pre-flop. I had QQ and tanked for a minute or two trying to figure out if Ace-Jack suited was a hand he could make that play with. Well lucky for me not only did I correctly guess that he could, he did happen to have that specific hand and my queens held up.

However, I was teased a bit about having to think about it. My estimation of an unknown villain's pre-flop shove range is:
AA KK AKs -- completely possible (100%)
AKo AQs QQ -- highly likely (90%)
AQo AJs -- somewhat likely (50%)
AJo, JJ, TT -- not as likely (25%), and for this villain I gave it 0%

Tanking for a sec didn't seem that unreasonable to me because if AJs isn't in his range I was in really bad shape. So the question is if my estimation of opponent's range is wrong or if calling off with QQ is a no-brainer just because if I'm willing to fold it I can be pushed around too much.

Question three, just a fun one, if a poker legend sat down and started grinding out $1/$2-$3 live NLHE what sort of win rate would they likely have?

Question four, I've read from a couple of sources that watching people's hands while playing live is extremely valuable but I don't yet know what to look for. Any links/resources would be appreciated.

Question five, what sort of situations is getting stacked just a cost of doing business? I've heard KK running in to AA, and I'm guessing that quads are also going to be the occasional cooler as they're so unlikely and it can be more expensive to give villains credit for having them than it is to just pay the toll occasionally.

Question six, As I dabble with the solver what inputs should I monitor carefully and what inputs won't affect the results much?

1) a new card coming out on the board. villain acting.
2) if he has just open jammed and we recognise that this isn't 2005 party and he isn't making the move of honor, then we snap with QQ
3) negative because they'd probably be bored as **** and start drinking within an orbit
4) if someone shows a hand down, then you can go back through each part of the hand in your head and see if what he showed down with would have been part of what you perceived their range to be. if it wasn't, then reevaluate said opinions
5) coolers be coolers
6) https://forumserver.twoplustwo.com/1...heory-amp-gto/