ICM shortcuts for live tournaments (or online without calculators)?
OK, I haven't played poker in a while, but I'm gearing up to start again soon. After catching up with some of the posts here, it seems that ICM is all the rage. I play online, but I do so in hopes of playing in live games. Thus, I don't really want to use an ICM calculator. However, that doesn't mean that I don't want to use the basics of ICM that I can carry over to a live tournament.
Does anyone here use ICM without ICM calculators? I'm not asking if you work the math out to four decimal points (if you do, I can't do that). But do you use the ICM concepts in some way that you feel is useful? You know, like a shortcut of some kind?
Let me give an example where you can use ICM without a calculator. Maybe you would call it common sense, but doesn't it use ICM concepts? OK, here it is:
Five players remaining and top five positions pay: $100, $99, $1, $1, $1 (contrived, I know)
Big stack has 1,000 chips, hero has 10 chips, and remaining three players have 1 chip each. Doesn't ICM pretty much tell us that the hero *never* call a preflop shove by the big stack? Even with AA!
I know that's contrived, but I just want to make sure I'm understanding the concept properly.
Also, are there some less-contrived situations were ICM can be used live or without a calculator?
Thanks a lot for any help. I like the concept, but I think some kind of shortcut or something is needed for live play. Or do you just have to use your gut?