Hi there ! I'm kinda new to the cash, so i'd like to clarify some things (hope some members can help me with that).

1 ) 6max, NL25. We are at CO. We open 0,75$. Button 3bets us to 2,25$

What's our minimum defensive frequency to prevent button from printing money by 3betting us with any two?

Well, my thought process is:

Our Min Def Freq (MDF):

B = betsize / potsize,      B = 1,5$ / 3,35$ = 0,44

We need to call 1,5$ for  3,35$  pot (0,1$ SB; 0,25$ BB, our Open 0,75$ now considered as a dead money +  2,25%

A = B / B+1 = 0,44 / 1,44 = 30,5%

MDF = (1-A)% = 69,5%

So, when a BUTTON 3bets our open from CO we need to defend at least 69,5$ (we can do it either by calling or 4betting).

Correct me if i'm wrong please.

Great site btw