In this article:

https://upswingpoker.com/use-these-4...l-blind-smart/

They say you can 3 bet 21.xx% of hands sb vs. button. This struck me as a crazy high amount of hands. I'm wondering what our plan is for this when our opponent does no fold. Clearly, we aren't going to be flatting 4 bets. So what should our 5 bet range be? How does this change according to Villains tendencies? What percent of flops should we be cbetting?

you can't do that without opening yourself up to exploitation from 4bets.

I think it's crazy too. I'd guess that the game theory optimal frequency for up to 200NL is nearer 15%, and that you should be flatting 4-bets with a few combos.

But if the BTN doesn't defend appropriately vs the 3-bets, having a super-high 3-bet % in the SB is +EV. As such, it's an "exploitative" adaptation, that works until villain learns to exploit it.

FWIW, Snowie doesn't value suited connectors as highly as Upswing does in that spot. At 100bb deep 100NL vs a 3x by button, it goes with 55+, A2s+, K9s+, Q9s+, J9s+, T9s, AJo+, KQo, QJo (which looks almost identical to an UTG opening range), but some of the worst combos in that range are mixed (sometimes just folds). Even if you 3-bet all those hands 100% of the time, it's only 15.7%.
At higher stakes (with lower rake), the 3-bet range can be wider.

P.S. Snowie thinks that if it's faced by a pot-sized 4-bet after it 3-bets 15%, then the 5-bet range is mostly TT+/AK with a little bit of AQs. If you were 3-betting 21%, and villain widened his 4-bet range, then you'd possibly start 5-betting 99 and AJs or AQo.

15-17% is solid

Agree 21 percent is too much. Likely the extra combos are suited connectors like Arty mentioned. Personally, I see no need to balance a strong linear 17 percent with anything weak that hates being oop.

Do you have a folding range vs a min 4 bet? I think you should, and I think it should be the extra 2-5% that's missing from a linear 15-17% range.

Vs an undersized 4b, I would flat all my PP’s, all my suited broadway, and AKo. Jamming KK+ and AKs.

So, I am folding a few offsuit combos and continuing with the rest of my range.

I do not polarize preflop, from any position. What A5s can do, ATs can do better.

I choose A5s > (A6s-A9s) in most situations vs good players to 3 bet. I don't consider whether or not it's polarization, but instead I just think A5s is more profitable than A6s-A9s because it can put in action on more postflop streets(if I'm putting in more action profitably, that adds to my winrate in a way that A6s-A9s cannot.)

However, I agree that ATs > A5s. I'd 3 bet them both in the situation described btn vs sb.

I think the opening size is pretty important. If the sizing is only a min-raise I'd imagine it could be wider. The Snowie recommendations that Arty posted work quite well for me. I sometimes go a bit wider and do 44-22 as well. QJo I usually fold. KQo I do like 50/50. I sometimes sneak ATo in there as well. The suited aces are gold. I'm 3-betting all suited aces all day vs. a BU open.

Not flatting from the SB vs. a CO or BU open seems good to me. I think when it gets to HJ and earlier positions flatting starts to become an attractive option.

20%+ seems a bit high to 3-bet, but I'd imagine it isn't that big of a mistake if it is one.

Isn't that back to front? A larger bet size means more folds therefore we can add more bluffs.

We add more bluffs in proportion to the value hands, but the value hands should decrease as the size gets larger since the hands need to be stronger.

As an extreme example. Think about the button opening 15x. In theory, we should be 3-betting very seldom and folding a lot.

We're talking about the raiser having the wider range with the bigger bet aren't we?

No, I was talking about the BU opener.

Although, with the SB 3-bet sizing the same principle applies.

Since value bets and bluffs aren't quite defined preflop, it isn't so easy.

It is more comprehendible to assume as your bet sizing goes up, the number of hands must decrease.

In the nl50 sessions I lately played on 888 (about 1,5k hands, imo very soft fields, up about 10 buy ins):
- I 3 bet late position opens from sb and button with: All suited Ax and broadways, offsuit a10+, k10+, pairs 33+, suitcons 89+
- I 4 bet button and sb with: All Ax and offsuit K10+ , other suited broadways, suitcons and pairs i flat

..... worked great, had almost no resistance, guess not one flat to 4 bet and 1, max. 2 times I had to fold to 5 bet shoves ......... especially regs seem to take the low variance route and fold most hands, when they shove I have an easy fold.

Nice, your 4-bets are especially highly exploitable. If someone catches on, you'll be bleeding money fast. But as long as nobody is playing back at you there isn't any reason to stop.

...... good thing on 888 no huds are allowed in snap/ zoom games, so regs will take some time to catch up