ICM

ICM is the single most important concept unique to tournament poker. In a cash game, every chip has exactly the same value. In a tournament, chips have a non-linear value because payout structures reward survival disproportionately. Having 100,000 chips is worth more than twice having 50,000 chips, but less than four times having 25,000 chips. This diminishing marginal value has profound strategic implications. The most direct impact of ICM is that it makes you risk-averse in certain situations. Near a bubble (when the next elimination secures everyone a payout), medium and large stacks should play tighter because busting out costs more equity than winning a pot gains. Short stacks, conversely, have less to lose and can be more aggressive. ICM pressure creates what is known as the 'bubble factor,' a multiplier that adjusts the value of winning and losing a pot based on tournament payout implications. A bubble factor of 1.0 means chips are valued normally (cash game). A factor of 1.5 means the cost of losing is 50% greater than the benefit of winning, which dramatically narrows your calling ranges. At a final table, ICM effects are most extreme. Pay jumps between places can be enormous, and every decision carries monetary weight. A common example: folding AKo to a short stack's all-in at a final table can be correct under ICM even though it would be a clear call in chip EV terms, because the risk of elimination is too costly relative to the potential gain. Understanding ICM helps you navigate the most consequential moments in tournaments, where huge amounts of equity shift based on single decisions.