Poker GTO Lab

Poker Solvers Explained: PioSOLVER & GTO Wizard Basics

What poker solvers actually compute, how PioSOLVER and GTO Wizard differ, and a beginner-friendly workflow to start studying with them.

GTO & Solver Basics
June 5, 2026

Table of Contents

You can’t study GTO seriously without a solver. This guide explains what solvers compute, how PioSOLVER and GTO Wizard differ, and a beginner workflow that won’t burn you out.

What a solver actually computes

How CFR Reaches a Near-Nash Equilibrium
1Input the Spot
Set both ranges, board, stack depth, and bet sizes.
2Play Out All Paths
The algorithm simulates every action sequence across the game tree.
3Measure Regret
For each decision, calculate how much EV was lost by not choosing the best action.
4Update Strategy
Shift frequency toward higher-EV actions to reduce regret.
5Repeat Until Convergence
Iterate thousands of times until no player can gain EV by deviating — a mixed-strategy equilibrium.
CFR converges to a mixed strategy (frequencies + EV per action). The result depends entirely on the ranges you input.

A poker solver is software that iteratively approximates a near–Nash-equilibrium strategy for a given spot (both ranges, stacks, and board). Its output is a set of frequencies (a mixed strategy) — e.g., “bet 70%, check 30%” — plus the EV of each action.

Under the hood it runs CFR (Counterfactual Regret Minimization), updating the strategy to minimize “regret” until it converges. You don’t need the math, but you must remember one thing: a solver’s answer is not absolute — it depends entirely on the ranges you input.

PioSOLVER vs GTO Wizard

PioSOLVER vs GTO Wizard
PioSOLVER
  • •Desktop app
  • •Solve any spot
  • •Intermediate+
GTO Wizard
  • •In the browser
  • •Browse pre-solved
  • •Beginner-friendly
Start with Wizard, go deep with Pio
PioSOLVERGTO Wizard
FormDesktop app you installCloud app in the browser
ComputeSolves on your PC (fully flexible)Browse pre-solved solutions
LevelIntermediate to advancedBeginner-friendly
StrengthConfigure any custom spotDrills and stats built in

Beginners should start with a pre-solved tool like GTO Wizard. You skip building game trees and can instantly check the “answer” for standard spots. Move to PioSOLVER once you want to dig into custom situations.

A 3-step beginner solver workflow

A 3-step solver workflow
1Grab the policy
Ignore tiny mixes
2Target leaks
Only unsure hands
3Verbalize why
Don't memorize
Loop this instead of trying to cover everything
  1. Read the policy, not the percentages — at first, grab only the big tendency (“c-bet this board at high frequency”). Ignore the 0.3% mixes.
  2. Target your own leaks — only review hands you were genuinely unsure about. Trying to cover everything guarantees burnout.
  3. Verbalize the “why” — don’t memorize outputs; be able to say “I attack because this board favors my nutted range.”
A solver is not a tool to memorize answers — it’s a tool to find where your intuition is wrong.

A common misconception

Solver Output: What It Promises vs. What It Doesn’t
What Solvers DO guarantee
  • •Near-optimal play given the input ranges
  • •Correct EV estimates for each action
  • •A baseline to measure your own deviations against
  • •Insight into balanced, unexploitable tendencies
What Solvers DON’T guarantee
  • •Accurate answers if input ranges are wrong
  • •Automatic profit vs. real opponents
  • •Accounting for opponent tendencies or exploits
  • •Replacing reads, game-flow, and table dynamics
Solvers are only as good as the ranges you feed them. Against real opponents who play exploitably, maximizing EV often means deviating from GTO.

“Play like the solver and you’ll always win” is false. A solver is only correct if the ranges you input are correct. Feed it unrealistic ranges and you get unrealistic answers. And since real opponents don’t play GTO, exploitation ultimately matters most.

Summary

Solvers are the standard study tool in modern poker, but misuse wastes hours. Loop through “grab the policy → target leaks → verbalize the why” to improve as fast as possible.

This article was prepared by the Poker GTO Lab editorial team for educational purposes, drawing on widely published solver outputs, training content, and preflop charts. The ranges and frequencies shown are representative tendencies; the true optimum depends on stack depth, opponents, and table rules. This site does not promote gambling.

Share:
3