Modern Poker Theory - Help Needed

[LondonImp]

Hi all.

Currently working through MPT by Michael Acevedo and I've got myself a bit confused and hope that someone who is working through it, or has already worked through it, can help out.

Hand ranges 43-46 (p. 143) detail the equilibrium responses to getting 3-bet in the HJ versus CO through to BB.

I can't work out why 44-22 as well as suited connectors 87s down to 54s are always calls (close enough to 100% to be immaterial to me anyway) but 88-55 are split between calling and folding 25%-75% of the time.

Does anyone know?

Also, amazing book - would highly recommend.

[modfalcon]

If you check out the HJ RFI range, you'll see that the HJ always opens with 66, but almost never with 44 (hard to see in the range chart, but I guess the RFI frequency with 44 is about 25%, while with 66 it's 100%).

So, when the chart says to call a 3-bet with 44 a 100% of the time, but call a 3-bet with 66 only 50% of the time, the result is that in the end you will have called the 3-bet with 50% of the 66 combos you had pre-flop (100% * 50%), but only with 25% of the 44 combos you had pre-flop (25% * 100%).

Don't know if that's all there is to it, I'm just a beginner myself, but this seems to be an important factor.