Is this concept only usefull when you have position and you want to decide between bluffing or checking? a depolarized bettor will not protect when he check and a polarized will do , so its a good tool for bluffing.

What other use does this concept have?

NO¡! This concept is usefull regardless of the position and effective stack sizes but it might be more valuable in certain spots like, as you say, in position. This concept helps to get a much better and accurate idea about the villain´s range structure so we can make more +EV decissions to potentially exploit it.

most hands you play will be merged by the river. it's not gonna be the best, or the absolute worst. more or less in between. Polorization on the other hand naturally comes up every now and then. It can happen on any street. certain cards will push a players range into polarization.

It's usefull to know when it comes up and how villain reacts to them.
then once you both know these spots, you can play around and play the meta game.

Let's say I call a button open from the bb.
Flop; QsTs2d
I check, Bttn bets, I raise, Bttn calls.
Turn;Ad
I bet Bttn calls
River: 8h
I jam all in for a pot sized bet.

What's my range look like?
Do I have second pair?
Do I have a weak Ace?

Nope, not if I'm sensible. I'm likely to have a huge hand or a busted draw.

I've basically got the nuts or nothing. So my range is "polarized".

Make sense?

If sizings are big I dont see how you can flat your whole range. Also calling too much out of the sb is not something I like

Maybe I misunderstand? I didn't say anything about flatting an entire range.

What I mean is; I will have some hands that flat. Of those I will check raise some on that flop. Once called, I'll bomb the turn w some, some of those will jam the river.

That range of hands (my check-raise flop, bomb turn, jam river) range will be extreemely polarized. Right?

You wouldn't take that line with one pair would you?

You aren't repping a thin value bet here with top pair bad kicker you rep a monster hand and, if I'm the hero taking this line, I will have exactly a flopped set, a draw that became a straight, or a busted flush draw.

Polarization also applies to preflop play.

I did a video on the topic of polar vs merged 3 bet ranges on YouTube.


If you still wanna get your head around it better go to Navonod on NLH on YouTube and watch a video on range construction or line creation or look for the one on polarization.

I'm actually pretty sure this is or at least can be wrong;

If ranges are such that one player is completely polarized and the other player has a range of all bluff catchers, the effect of position is at least less important and sometimes completely irrelevant.

if you have an all bluff catcher range you will never bet into your opponent's polarized range regardless of being in or out of position.

If you are playing a polarized range against a bluff catcher range you will always have incentive to bet if you are in position or out of position.

In a true "PvsBC" (Polar vs Bluff Catcher) scenario, the polar player will bet all his value hands and enough bluffs to balance his range and he will do this in position if checked to but he will also do this out of position.

The BC never has incentive to bet into the P range regardless of being first to act or acting second.