Question 1

What is ICM (Independent Chip Model) in poker?

Accepted Answer

ICM (Independent Chip Model) is a mathematical model used to convert poker tournament chip stacks into monetary equity. It calculates each player's expected share of the remaining prize pool based on their stack size relative to others, accounting for the non-linear relationship between chips and actual dollar value in tournaments.

Question 2

When should I use an ICM calculator?

Accepted Answer

Use an ICM calculator during final table negotiations for deal-making, when analyzing push/fold decisions near the bubble or pay jumps, and when studying tournament spots where chip stack sizes significantly impact your expected value. ICM is most important when the prize pool distribution is top-heavy and stack sizes vary significantly.

Question 3

How does ICM calculate tournament equity?

Accepted Answer

ICM uses the Malmuth-Harville model to calculate equity. It considers all possible finishing orders weighted by stack sizes, where larger stacks have higher probabilities of finishing in higher positions. The calculation sums each player's probability of finishing in each position multiplied by that position's payout.

Question 4

Why are chips worth less than their face value in ICM?

Accepted Answer

In tournaments, the first chip you win is worth more than subsequent chips because tournament payouts are top-heavy. Doubling your stack doesn't double your equity—a concept called 'diminishing marginal utility of chips.' This is why ICM equity differs from chip equity (your percentage of total chips in play).