Short Stack Poker Strategy

In tournament poker, a short stack is usually anything under about 20 big blinds effective, and below roughly 15bb most hands come down to a single decision: shove all in or fold. Short-stack strategy starts with that effective stack size. This guide covers MTTs, not cash-game short-stack systems: at these depths, preflop push/fold decisions, position, fold equity, and ICM matter more than postflop play.

What counts as short stacked

"Short stacked" gets used a few different ways, and they're worth telling apart:

• Relative to the field. You're short if you have fewer chips (in big blinds) than the average stack at your tournament. This can be a variable target that shrinks as the blinds go up, even if your own stack hasn't lost a hand.
• Under ~20bb effective. A rough, widely-used benchmark. Below it, stack-to-pot ratios get small enough that opening hands commits a real fraction of your stack, and preflop decisions start to dominate the hand. The button's solved 20bb chart shows a restricted shove/fold solution. It is not a standard opening range: smaller raises, limps and postflop play are not evaluated by that chart.
• The smallest stack. "The short stack" (with a definite article) usually just means whoever has the fewest chips in the hand, at the table right or in the tournament right now, regardless of the actual number.

They're the same underlying idea (not much room behind your stack) measured in different ways. What actually changes your strategy is the number in big blinds, so that's what this guide - and every chart on this site is built around. If your stack is in chips rather than big blinds, the tournament stack calculator converts it, and reports the cost of an orbit alongside it.

Why short-stack strategy matters

Being short isn't just something to endure until you can play "real poker" again. It comes with real benefits.

• Easier decisions. A shove/fold model removes postflop branches, making it easier to study short-stack decisions. Smaller raises and limps can still be useful in the full game.
• Easier to study. One street (preflop) to focus on, which can give you a massive edge over the field. That's a small enough number of permutations to actually memorize solved charts for, which isn't realistic for the full tree of a 100bb postflop hand.
• Better equity realization. A shove doesn't just risk your stack, it denies your opponent the rest of the hand, and makes sure that you never end up folding a hand that could have been a winner. Many hands have real equity against a calling range but would struggle to realize much of it across three streets of postflop play out of position. However when jammed preflop, it gets to cash in all of that equity in one go, plus whatever fold equity the shove itself earns on top. That's why solved shoving ranges are consistently wider than they "should" be by raw equity alone. This is also important to keep in mind for exploitative decisions as you continue to hone your skills.
• ICM. Once real money is on the line at pay jumps, chips stop being worth a fixed amount - busting is disproportionately costly compared to what you gain from winning a marginal pot. Short-stack decisions are where that pressure is sharpest, which makes this the highest-leverage spot in the tournament to actually understand ICM.

How push/fold strategy works with a short stack

Push/fold compares committing your stack with folding. It is a restricted game model, including below 10bb: it does not evaluate limps, smaller raises, raise-fold lines or postflop play. The charts help you study these all-in decisions without claiming they solve every available action.

The button's solved opening range at two depths shows why. At 10bb it shoves 39% of hands, 66 of them at full frequency. Drop to 5bb and the range widens to 47% - shorter means a shove risks less in absolute terms, so more hands clear the bar.

Not sure how to read the colors or the split-fill cells above? Start with How to Read a Push/Fold Chart. For the full picture of how a range changes from 5bb up through 15bb effective - and how the restricted shove/fold solution changes - see Push/Fold Strategy by Stack Depth.

Position changes the range as much as depth does

The same stack size plays completely differently depending on who's left to act behind you. Opening under the gun means the whole table can still wake up with a hand, so that range stays tight even when you're short. Opening from the button, with only the blinds left, is a different game entirely - the range widens sharply because there's so much less behind you to punish it. The blinds have their own asymmetry on top of that: defending against an under-the-gun open is a much tighter decision than defending against a button open, because the range you're facing is tighter too. See Big Blind Defense for the solved charts behind that comparison.

Table size pulls the same lever, in a way that is easy to guess wrong. The button always has only the blinds left to act behind it, so a 9-max button looks like it should play the same as a 6-max one. The solved charts disagree: at 10bb the 9-max button shoves 40% against 39% at 6-max. Nine players have posted an ante rather than six, so there is more dead money sitting in the middle to win uncontested, and that extra reward pulls another few percent of hands over the line.

These button examples both give hero a 10bb starting stack, but the chip-EV and ICM models also differ in opponent stacks and solver version. The chip-EV chart shows 39% shoves and the bubble example 52%. This illustrates different situations, not an isolated measurement of ICM. The 10bb guide lists the bubble stacks and payouts.

How ICM changes short-stack strategy

Near the bubble and every pay jump after it, chip-EV stops being the right model on its own. ICM converts everyone's stack into real tournament equity given the payout structure, then re-solves the same push/fold question against that instead of raw chips. The practical effect can vary based on the stack depths involved. Generally there is a risk premium where risking your stack is a lot worse compared to Chip-EV. However you can apply this same pressure to other opponents if you are the covering stack. Start by learning a good Chip-EV baseline strategy, then focus how ICM can impact different aspects of your strategy. Smaller raises and limps can also matter under ICM. That's a real, important idea, but it's a sizing decision this site's charts don't currently model, so treat it as something to be aware of rather than something to look up here.

Stage of the tournament matters too, independent of your own stack: the same 15bb stack plays differently three tables from the money than it does one spot from a pay jump, even though the chip-EV math hasn't changed at all - only the payout structure sitting on top of it has.

How to adjust to your opponents

Everything above assumes opponents who play back at you close to optimally. Real opponents don't, and once you have a real read - not a guess off one hand, but a sustained pattern, the highest-EV range against that specific player isn't the balanced one anymore. GTO vs. Exploit covers when that adjustment is worth making, and Exploiting Tight and Loose Opponents shows the actual hands that move: wider against a big blind who folds too much, tighter against one who calls too much - and it's worth noting those two adjustments aren't mirror images of each other, since widening against folding creates new bluff candidates from nothing while tightening against calling just erodes the fold equity behind hands you were already shoving. It gets more interesting still with two different reads to weigh at once - a tight player in one blind and a loose one in the other, or a loose big blind behind a short stack that's pricing in its own ICM survival. That combination is exactly what the app's ICM exploit trainer is built to drill.

If the tables you play are low stakes, that adjustment is worth more than it is anywhere else - your opponents deviate further, so the gap between the balanced range and the highest-EV one is wider. Push/Fold Strategy for Low Stakes sets out the order to do it in, and why going straight to the exploit without the baseline first is just guessing.

This is the same border-coded comparison Practice shows you after every hand: your answer's range against the GTO baseline for that spot, with any cell that moved meaningfully ringed to show which way. Below, the button's 10bb shove range widens from 39% at GTO to 50% once the big blind is tagged as folding too often - every ringed cell is a hand that only makes sense once you know this specific opponent's tendency.