Poker Texas Hold'em Sit-and-Go - Independent Chip Model (ICM)
The Independent Chip Model (ICM) is a way of calculating the right decision when playing the bubble in Texas Hold'em tournaments.
Three players:

A = Player 1's Stack
B = Player 2's Stack
C = Player 3's Stack
T = Total chips in play
(A * 0.5 + B * (A * 0.3 + C * 0.2) / (A + C) + C * (A * 0.3 + B * 0.2) / (A + B)) / T