ICM Basics

Key takeaways

• ICM is about prize equity, not the probability of winning one hand.
• Its effect grows around meaningful payout thresholds and when stacks differ sharply.
• A player who is covered can face a risk premium because losing can eliminate them.
• ICM does not know opponent skill, future seat position or every real-world factor; it is a model, not an oracle.

A simple intuition

Imagine three players remain and two places pay. If two medium stacks collide in a huge pot while a third player has almost no chips, the player who loses the collision may bust before the tiny stack. Avoiding that outcome can be worth more than the extra chips gained by winning are worth.

Chip EV versus money EV

A play can win chips on average yet reduce expected prize value in some payout situations. That distinction is one reason tournament strategy cannot be derived entirely from cash-game logic.

Risk premium

When losing chips hurts more than winning the same number helps, you need more equity than a chip-only pot-odds calculation would imply before accepting certain all-in risks. The extra requirement is often described as a risk premium.

What ICM does not mean

ICM does not mean “never gamble near the money.” Large stacks may profit from pressure, and short stacks can be forced to take risks. It also does not replace poker fundamentals such as ranges, position and opponent behavior.

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