Originally posted by lessthanthreee
in my example what hero starts the hand with is 900 chips. BUT he posts the BB of 400 and is left with 500 behind.
therefore the raiser only has to raise an extra 500 chips + the 400 chip BB to put hero all in.
even if he raises to 1000. his effective raise is still only 500 extra over the BB and you have to adjust the pot down accordingly.
its hard to explain. im just trying to say that if someone shoves all in for 10BB and you only have 1bb behind.. obviously you cant win the whole 10BB from him, but only your stack. so you have to make sure you calculate the pot odds off your stack and not his
I still don't agree completely, maybe we are saying the same thing in two ways, but: If Hero posts a BB of 400, leaving 500 behind he can still win 1BB from CO (400) + what CO raises up to maximum of what you have left (500), meaning that CO can constribute with a total of 900 to the pot, which was what hero had at the start of the hand, and I believe is what the pot odds should be calculated from (+any blinds/antes posted of course) =
Pot odds = possible winnings : cost of staying in the hand
In this case:
Pot odds = blinds (600) + 900 from CO (no matter how much he raises above the 900 of course): 500 <=> pot odds = 3:1
No matter what it is of course a clear call with any two cards!
And @ Bradomurder I do that and I know of the ICM and bubble play 
@ghaleon Of course, it is a shitty situation to be that short, but you cannot always evade it, but you might be right about pushing from UTG, although I would say it depends alot on how many people are left at the table.