Hey hey!

So basically I've started studying Preflop Advisor app pretty hard to get a better general idea of how ranges work. I am rewriting every possible scenario in the app to kind of memorise main rules about the ranges.

I've just re-wrote the ranges it suggests for defending BTN vs UTG,MP and CO open. What really surprises me is that the ranges don't differ almost at all versus all three positions.

• We are not supposed to defend 22-66, which really surprises me especially vs the CO.
• No flatting with lower suited connectors (3B of high frequency with 54s-76s vs all positions).
• AJo vs CO is a 60% raise or fold
• KQo is a 3B or fold vs CO
• most of suited Aces are always a 3B

I mostly don't understand why the range is so tight vs the CO. I guess the ranges vs UTG and MP make a bit more sense.
Also the flatting range is really narrow which looks weird.

What do you guys think about the app and the ranges in general ? I've seen few opinions here that it's a great app to get a better feel about ranges and that they should keep you out of trouble.
Although, as I am a fish, I don't really understand why would the range be so tight.

Cheers!