Poker solver AI: what GTO software actually solves

Let's start with a clear definition

A poker solver is software that works out a game-theory optimal, or GTO, strategy for a specific spot. Feed it the stack sizes, the pot, the bet-sizing options and the range of hands each side could realistically hold, and it calculates exactly how often to bet, raise, call or fold with every hand in that range, so that no single deviation from the plan can be exploited. That's the whole idea in one sentence: a balanced strategy nobody can profitably attack.

It's worth being precise about what that isn't. A solver doesn't know your opponent's actual cards, it doesn't watch the table, and it isn't running live during a hand at a real table, that's a different, banned category of software covered further down. What it produces is a reference strategy, computed in advance, for a defined situation.

How a solver actually gets to its answer

Most modern solvers lean on an algorithm called counterfactual regret minimisation, CFR for short. Practically, that means the software plays a huge number of hands against a copy of itself inside the defined game tree, and after every hand it nudges each decision slightly toward whichever action it "regretted" not taking more. Do that millions of times and the small nudges converge on a stable equilibrium, a strategy where, if either side deviates on its own, it only makes its own result worse.

That process is genuinely heavy computation, real solvers can take hours to run a single deep, multi-street spot with wide ranges on both sides, which is exactly why GTOWizard and similar tools sell pre-solved solution databases rather than asking you to run everything from scratch. It's a legitimate, serious piece of engineering, closer to the game-theory research world than to a slot predictor app.

What this chart is, and isn't

There are some rough edges worth naming plainly, because a page about honest solver explanations shouldn't oversell its own tool. This chart shows a simplified, single-scenario opening range for a generic 100 big blind, six-max cash game, folded to you, at each position. It's built to be directionally right and useful for learning the shape of a range, tight up front, wide on the button, but it isn't a live solver output. A real solve would flex with the exact rake structure, effective stack depths, table tendencies and whatever sizing options were fed into it, and postflop play branches out into thousands of further decisions this page doesn't attempt to cover.

You might be right to wonder why the button opens so much wider than early position, and the honest answer is position itself. Acting last after the flop is a real, measurable advantage, so a hand that's a clear fold under the gun becomes a perfectly good raise on the button, where fewer players are left to wake up with something strong behind you.

Solver, equity calculator, or Chen formula, which one for what

All three tools live under Poker AI on this site, and they answer different questions. The Chen formula rates one hand in isolation in a fraction of a second, a fast first pass with no opponent involved. The equity calculator runs one specific hand against one specific opponent hand over thousands of simulated boards, answering "who wins this matchup, and how often." A solver sits above both: it reasons about entire ranges on both sides across every remaining betting round, not just one hand versus one hand, which is why it needs serious computing power rather than a quick simulation. Decide for yourself how deep you want to go, the Chen formula and equity tools are plenty for most study sessions, a full solver licence is a different level of commitment.

Poker bots, real-time solvers, and where the line actually sits

Studying with a solver between sessions, the way this page uses one, is completely standard practice among winning players and isn't cheating in any sense, it's homework. The category that gets a player banned is real-time assistance, sometimes called RTA: software running live during an actual hand, telling you what to do based on the cards on screen. Virtually every online poker room explicitly prohibits this, win or lose it's treated as cheating, and getting caught typically means a closed account and forfeited funds, not just a warning. If a page or forum post is selling a "real time poker solver" you run mid-hand, that's the product category to stay well away from, regardless of how it's marketed.

Poker bots are a related but separate problem: fully automated players that make every decision without a human at all. Sites run detection specifically aimed at bet-timing patterns, unusually consistent GTO-style deviations and database cross-referencing to catch them, which is a different fight from the solver-study question above but often gets lumped in with it in casual conversation.

Does any of this guarantee winning poker?

No, and it's worth being honest about that too. GTO is an unexploitable baseline, not a maximum-profit strategy against a specific, weaker opponent sitting across from you right now. Most winning players study solvers precisely so they know what balanced looks like, then deliberately deviate from it to punish real mistakes they see at the table, folding tighter against a player who never bluffs, bluffing more against one who folds too much, and drifting back toward balance against tougher opposition. Memorising a chart also doesn't fix execution: sizing tells, timing patterns and weak postflop decisions cost far more in practice than a slightly imperfect preflop range ever will.