What is GTO poker? A plain-English guide you can run yourself
Updated November 2026
GTO stands for game theory optimal: a way of playing that can't lose money over time against any opponent, in a two-player game with no rake. It leaves nothing to attack, and that's also its limit, because it won't punish a bad player as hard as a plan built for that player.
The easiest way to understand it is to watch a computer find it. Below is the same method solvers use, working on the simplest game there is.
Value to bluffs on the river
What does rock, paper, scissors have to do with poker?
Everything. If you throw rock half the time, I'll throw paper and beat you. The only way to stop me is to throw each one a third of the time, and then there's nothing I can do about it.
Who wins each round
Your throw down the side, mine across the top
That's GTO. You stop trying to outguess me and play so that my choice doesn't matter. In game theory it's called a Nash equilibrium: neither player can do better by changing only his own plan.
How does a solver work?
It plays against itself and keeps score of regret: how much better each option would have been. Options it regrets not playing get played more next time. You just watched it do exactly that.
A poker solver does the same thing across millions of situations. No human can memorize the result, which is why people study the patterns and leave the exact numbers to the computer.
What a solver does
- Play every option
- Score what each one would have earned
- Play the regretted ones more
- Repeat millions of times
Why do you have to bluff at all?
Because if you never bluff, I'll fold every time you bet. Then you win nothing with your good hands. Try it: you're on the river and your bets are either the best hand or a bluff. Slide how often you bluff and watch what he should do.
There's one bluffing frequency where his call and his fold are worth exactly the same. That's the balanced number, and at that point he can't exploit you.
How much should you bluff and how much should you defend?
Both numbers depend only on the size of the bet. The bigger the bet, the more of your bets can be bluffs, and the less often he has to call.
The other line is called minimum defense frequency: how often he has to continue so that your bluffs don't print money. Against a pot-size bet it's 50%.
These are the same numbers as pot odds, seen from the other side of the table.
Why does GTO mix its plays?
Because anything you always do can be attacked. If you always bet your big hands and always check your weak ones, your bet tells me everything. So a solver will often play the same hand two different ways, in a fixed proportion. That's a mixed strategy.
One hand, two plays
An example of the idea, not a solver figure.
How do you measure how far you are from GTO?
With a number called exploitability: how much a perfect opponent could win from your strategy. In rock, paper, scissors it's easy to see. Throw rock too often and paper starts to print money.
Solvers stop when that number gets small. A solver result is never perfect, only close enough that nobody could tell the difference at the table.
How many bluffs should I have?
That depends on the size of your bet. Bigger bets give him a worse price, so more of them can be bluffs.
Those are for the river, when no more cards are coming. On earlier streets you can bluff more, since a hand that's behind now can still improve.
Why do solvers bet some flops and check others?
Because one player's range fits some boards better. Before the flop the raiser has more big cards, so high flops favor him and he can bet nearly all his hands small.
How a button raiser plays after a check
Our own solver on a simplified betting tree
On low flops the big blind's range catches up. So the button checks far more, and when it does bet it uses a bigger size.
Should a beginner play GTO?
Not at first. The players at most low-stakes tables are nowhere near balanced, and the fastest way to beat them is to find what they do wrong and punish it. That's called exploiting them.
GTO or exploit?
What each player type gets from you
Learn GTO so you know what normal looks like. Then look for who isn't normal.
Start with ranges and pot odds. Everything in a solver is built on those two.
What does a balanced river look like?
The pot is $100 and you bet $50. A balanced player has 3 value hands for every bluff here. Say that's 30 value combos and 10 bluffs.
His call is worth exactly nothing, so he can do whatever he likes and you make the same money. Add more bluffs and calling becomes profitable for him; take some away and folding does.
Which hands make the best bluffs?
Hands that block what he'd call with. If you hold the ace of the suit that's on the board, he can't have the nut flush, and that makes him less likely to call. Good bluffs also tend to be hands with no chance of winning at showdown, because you're not giving anything up by betting them.
A bluff with a blocker
He can't hold the ace-high flush.
Does GTO work with more than two players?
Not in the same way. With three or more players there's no guarantee, because two opponents can end up helping each other without meaning to. Solvers mostly work on two-player pots for that reason.
How many players?
How do solvers cope with a game this big?
They simplify. A solver is given a short list of bet sizes, like a third of the pot and three-quarters, and works only with those. The result is close to balanced within those limits, and our own solver works the same way.
A short list of bets
A solver only looks at the sizes it's given.
What do people get wrong about GTO?
- Myth"GTO means you always win."It means you can't be beaten over time in a heads-up game. You can still lose any single hand.
- Myth"Poker is solved."Heads-up limit hold'em was essentially solved in 2015. No-limit is far bigger, and solvers work on simplified versions of it.
- Myth"You need to memorize solver output."Nobody can. Learn the patterns and the reasons behind them.
- Myth"GTO is boring and passive."Solvers bluff and raise a great deal, often with hands most people would fold.
How should I study GTO?
Take one hand at a time. Pick a big pot you played, then ask the same three questions: what was the price, what ranges were we both holding, and which line did the balanced strategy prefer?
Focus on the spots that come up every session, and leave the rare ones for later. Then drill them, because knowing a pattern and using it in five seconds at the table are different skills.
Three questions per hand
- What was the price?
- What ranges were we both holding?
- Which line did the balanced strategy prefer?
Can you do the numbers?
Twelve spots in three rounds.
Questions players ask about GTO
Is GTO poker unbeatable?
In a two-player game with no rake, it can't lose over time. With three or more players at the table there's no such guarantee, and rake takes money from everyone.
Does GTO make the most money?
Not against weak players. A plan built for that player's mistakes wins more.
Can I use a solver at the table?
No. Real-time solver help is banned on the major online sites, and solvers are for studying away from the table.
How much do I need to know before I start with GTO?
Know your hand rankings, your position and how to work out a price. Everything else builds on those.
What is a solver?
A program that works out the balanced strategy for a poker situation, using the kind of regret-based method you ran at the top of this page.
How the numbers on this page were worked out
The solver at the top is regret matching, running live in your browser and starting from a deliberately lopsided position.
In the river game, calling is worth b × (pot + bet) − (1 − b) × bet, where b is the share of bets that are bluffs. That is zero at b = bet / (pot + 2 × bet). Minimum defense is pot / (pot + bet).
Know someone who says GTO is a scam?
Send them this page, or keep the cheat sheet for your next session.