“I was already pot committed” is the most expensive sentence a losing player ever says, and most of the time it isn’t even true. Chips that are already in the middle belong to the pot, not to you, and they exert no gravitational pull on your next decision. What actually commits you is the shape of what’s left: how much money is behind relative to how much is out there to win.
That relationship has a name and a number. Take the effective stack, meaning the smaller of the two stacks in play, and divide it by the size of the pot on the flop. That’s your stack-to-pot ratio. Everybody call it SPR, since that’s what it’s called at the table. A $17 pot with $192 behind gives you an SPR of about 11. A $57 pot with $172 behind gives you about 3. Those two flops are not the same game even if the cards are identical.
The reason this one division problem is worth doing is that it converts a vague feeling into a plan. At an SPR of 3, top pair with a decent kicker is a hand you are happy to play for stacks. At an SPR of 11, that same top pair is a hand you’d like to win a medium pot with and then stop. You don’t need to feel your way there hand by hand. You can know before the flop is dealt.
The three bands that cover almost every flop you’ll see
Under about 3, one pair is usually enough. There simply isn’t room for the money to get in over multiple large bets, so the hands that beat you are a thin slice of what your opponent holds. Top pair with a good kicker, an overpair, sometimes second pair with a draw attached: these all get stacks in without much agonizing.
Between roughly 4 and 6, you’re in the zone where good players make their money and bad players donate it. Top pair is still often good enough, but you need the kicker, and you need to notice when the board runs out in a way that beats it. This is the band where a single ill-considered call on the turn turns a manageable pot into a stack-off you never chose.
At 10 and above, one pair is a one-street or two-street hand. Stacks only go in when someone has two pair or better, or is bluffing with a draw that missed. This is where implied odds start to matter, meaning the money you expect to win later if you hit. Small pairs and suited connectors want deep stacks precisely because the payoff for flopping a set is enormous relative to the cost of missing.
None of this is a law. It’s a prior, and it shifts with opponent tendencies, position, and board texture. But a prior you’ve thought about before the action starts beats improvising under pressure.
You choose the ratio before the flop, and then you live with it
Here’s the part most players skip. SPR is not something that happens to you. It’s set by preflop bet sizing, and you’re one of the people doing the sizing.
Run it through. In a $1/$2 game with $200 stacks, you open to $8 on the button and the big blind calls. The pot is $17, with $192 behind. SPR of 11. Your ace-king is going to have a slightly uncomfortable afternoon on any paired or connected board.
Now the same hand with a 3-bet. You open to $8, the big blind raises to $28, you call. The pot is $57 and there’s $172 left. SPR of 3. Flop an ace and you’re getting it in without a second thought.
So when you look down at a hand that wants low SPR, build a low SPR. Big pairs, big broadway cards, hands whose value is in being best right now rather than improving later: these prefer the pot inflated preflop. Small pairs and suited hands want the opposite. Flatting instead of raising with ace-king out of position is how you end up playing a 300-chip pot with 1,500 behind and no idea what to do on a queen-high flop.
The math behind this is not new. The framework was laid out back in 2007 in Professional No-Limit Hold’em: Volume I, and the core idea has survived every solver-driven revision of strategy since.
The turn is where commitment stops being theoretical
Flop SPR is the number people quote. Turn SPR is the number that decides where the money goes, and it’s the one almost nobody computes at the table.
Try it. Pot is $60 on the turn after a flop bet and call. Your opponent bets $40. You have $95 left. If you call, the pot becomes $140 and you have $55 behind. On the river, a shove is about a 0.4 pot-sized bet. Facing it, you’d be getting nearly four-to-one, needing to be good around 22% of the time. Almost no hand you’d call the turn with folds at that price.
Which means the real decision was on the turn, and it was a decision to put in $95, not $40. That’s the whole trick. Before you call a turn bet, check what’s left against what’s in the middle. If the remainder is smaller than the pot, treat the call as a commitment to the river, because the price you’ll be offered will be too good to refuse.
The same logic runs the other way when you’re betting. If you want to bluff a river, leave yourself enough behind for the bluff to be credible and enough of your opponent’s stack alive to be foldable. Bombing the turn to a point where your opponent’s remaining chips are a rounding error doesn’t fold anyone.
Where the neat bands stop working
Multiway pots break the guidelines first. Three players in means a bigger pot, which mechanically lowers the ratio, and that makes it tempting to commit with a thinner hand. Do the opposite. Your top pair has to beat two ranges, not one, and someone in there usually has a piece. Low SPR multiway is a reason to need a stronger hand, not a weaker one.
Tournaments break them next, in two directions at once. Antes inflate the starting pot, which drags every postflop ratio down a notch before anyone has done anything clever. Big blind antes at modern structures mean a pot that used to start at 3.5 big blinds now starts at 4.5 or more. Meanwhile, pay jumps push the other way. Near the money, chips you lose cost you more real dollars than the chips you win are worth. An SPR of 3 in a cash game is an automatic stack-off with top pair. The same ratio on the money bubble is not.
There’s also the shape of the board. An SPR of 4 on a rainbow king-seven-deuce is worlds away from an SPR of 4 on nine-eight-seven with two hearts. When many hands improve, the pair you flopped ages badly, and the correct commitment threshold rises. Ratios describe geometry. They don’t read cards.
And one honest limitation: none of this tells you much about how to play a hand with a lot of equity but no showdown value yet. Draws follow their own logic, where semi-bluffing versus flatting depends more on fold equity and blockers than on any single ratio.
What an $85 million tournament looked like when the ratio hit zero
The cleanest version of commitment is the one where the number goes all the way down. At the 2026 WSOP Main Event final table back in August, Han Feng raised to 6,000,000 with two aces, Lauri Saaskilahti reraised to 50,000,000 with pocket nines, and Feng called all in for 25,000,000. At that point SPR is zero and strategy is finished. The flop came all diamonds and left Saaskilahti needing a nine or running straight cards, and the jack turn and queen river delivered exactly that. Feng was out. Jumalon went on to win the whole thing for $10,000,000.
The lesson isn’t the bad beat. It’s that Feng’s stack size made his decision trivially correct and left no room for anything to go wrong except the deck. Most of the money in poker is lost in the hands where there was still room, and the player didn’t measure it.