But let's say that the button is a good reg and is raising first in with roughly 50% of the hands with a 2.5bb open, the stacks are deep without ante, how would your thought process look like when determining if you call or not?There are so many variables, that it makes no sense to talk about “a range” for defending the big blind. Position of the player opening, his open size, stack sizes, ICM-pressure. If there are field callers, I tend to defend less, which I think is something, a lot of people get wrong. And finally if someone is opening very wide, I will defend more. Or if someone is opening very tight, I will defend less. A HUD is usefull for gathering that information, if the site allows it.
But let's say that the button is a good reg and is raising first in with roughly 50% of the hands with a 2.5bb open, the stacks are deep without ante, how would your thought process look like when determining if you call or not?