The hand looks simple on paper. Blinds are 100/200 in the first hour of a $1,500 event, you hold ace-jack offsuit under the gun with 30,000 chips, and a player in the cutoff three-bets. That is 150 big blinds behind. Most experienced tournament players fold here without much thought, and the reason has nothing to do with the cards.
It has to do with the stack.
Stack size, measured in big blinds and not in raw chips, is the variable that changes every other decision at the table. The same ace-jack becomes a clear all-in with 12 big blinds on the button and a routine fold with 150 under the gun facing aggression. Learning to read your own stack and the effective stack (the smaller of the two stacks in a hand) is the first real step beyond knowing what hands beat what.
Why the early levels are a deep-stack game
Most live tournaments, from a WSOP daily at the Horseshoe and Paris in Las Vegas to a Sunday event on PokerStars, start players with 100 big blinds or more. With that much behind, very few hands are worth stacking off with before the flop. Pots grow over four streets, and the player who wins is often the one who sees cheap flops with hands that can make something big.
That is why small pairs and suited connectors gain value early. Calling a raise with fours to hit a set works only when the stacks are deep enough to win a large pot on the rare occasions you flop three of a kind. Players have long used a rough guide that the set-mining call should cost no more than about one-fifteenth to one-twentieth of the effective stack. With 150 big blinds it is often fine. With 25 it is a slow leak.
Offsuit broadway hands go the other way. King-queen and ace-ten look attractive, but deep stacks punish domination: when you hit top pair you are often up against a better kicker, and the money goes in on later streets. Folding these hands to early raises is one of the least glamorous and most profitable habits in tournament poker.
Stack-depth bands at a glance
A practical way to think about stack size is to group it into bands. The boundaries are approximate and shift with the ante structure, but the logic holds.
Swipe the table
| Effective stack | Typical approach | Hands that gain value |
|---|---|---|
| 100+ big blinds | Play for implied odds, keep pots small out of position | Small pairs, suited connectors, suited aces |
| 40 to 100 big blinds | Standard opening and three-betting, careful calling | Strong broadways, mid pairs |
| 20 to 40 big blinds | Open smaller, three-bet all in as a weapon | Ace-x, pairs that can shove over opens |
| Under 15 big blinds | Push or fold, rarely open-limp or call | Any hand with high-card or pair value |
Dan Harrington popularized a related measure called M in Harrington on Hold’em, which divides your stack by the total cost of one orbit (blinds plus antes). M is useful in structures with large antes, while counting big blinds works well with big-blind-ante formats that most major tours now use.
How a big stack should play early
The early big stack is rarely a huge one. Doubling up in level two gives you 300 big blinds, and the main advantage is coverage: you can put others all in without risking your tournament. That matters more as the bubble approaches and medium stacks start folding to protect their place, a pressure that comes from the Independent Chip Model (ICM), the standard method for converting chips into prize equity.
In the first levels, though, ICM pressure is close to zero. Nobody is near the money and most players will happily gamble. A big stack trying to bully at this stage often finds itself called by players with nothing to lose. The better plan is to keep opening in position, isolate weak limpers and avoid marginal confrontations with the other deep stacks, who can hurt you as much as you can hurt them.
You will notice that strong players with deep stacks fold a surprising amount. They are not timid. They know that a fold in poker costs nothing beyond the blinds already posted, while a bad call with 150 big blinds behind can cost the entire stack.
How a short stack should play
Short stacks appear early more often than you might think, through late registration, re-entries or one lost all-in. Once you drop under roughly 15 big blinds, the game simplifies into a single decision before the flop: move all in or fold.
Push/fold charts, the modern version of the old poker value chart, list the hands that can shove profitably from each seat at each stack depth. Early versions came from the Sklansky-Chubukov rankings, which assumed the opponent knows your hand. Current charts are built from equilibrium calculations in software like HoldemResources Calculator and ICMIZER. The shoving ranges from the button and small blind are much wider than most new players expect, and they include hands like king-seven suited or queen-nine offsuit at short depths.
Between 15 and 25 big blinds the short stack has a second weapon: the re-shove. When an opponent opens from late position, an all-in over the top with a hand like ace-nine or pocket sevens wins the pot often enough to be profitable even when called occasionally. Limping and calling are the two worst options here, because they put chips in without the fold equity that makes short-stack play work.
Boards that hit two ways
Deep and short stacks also read flops differently. A board such as jack-ten-eight with two hearts hits many hands in more than one way, giving pairs, straight draws and flush draws at once. Some players describe this as the flop hitting “two states”. For a short stack, the plan is easy: with a pair and a draw you are usually happy to get the chips in. For a deep stack, the same hand has to think about the turn card, the size of the pot and whether a bigger draw is already ahead. That extra layer is why postflop study, including work with poker solvers, focuses mostly on deep-stack spots.
Changing gears as the blinds rise
Blind levels in most tournaments last 20 to 60 minutes, so a stack that starts deep becomes short without losing a hand. A player who sits on 30,000 chips through four levels will look down at the same pile and find it worth far fewer big blinds than when the event began. The adjustment is gradual: fewer speculative calls, more opening from late position, and eventually the switch to push/fold.
The players who struggle are those who keep a deep-stack mindset with a short stack, calling raises with small pairs at 20 big blinds and folding them to a shove one level later. If the vocabulary of stacks, antes and effective stacks still feels unfamiliar, the poker terms glossary covers the basics. The rest comes from counting big blinds before every decision, a habit that takes about one session to start and much longer to stop forgetting.
Back at that first hand, ace-jack facing a three-bet with 150 big blinds behind, the fold costs 200 chips. Three levels later, at 1,000/2,000 with the same 30,000 chips, the identical hand on the button is an easy all-in.