How To Build Custom Solutions

Say goodbye to the limitations of presolved solutions with GTO Wizard AI!

In the past, we solved spots using traditional solvers and then uploaded them to a library of solutions. Presolved solutions are fast and useful, but this meant users couldn’t change anything about the spot. This is where GTO Wizard AI comes in.

With custom solving, you can change every parameter and solve it in seconds!

Prefill Spots

The prefill button lets you import the ranges, stack, and pot from a pre-solved GTO Wizard solution.

Select the PREFILL button in the top-left corner to open the PREFILL menu.

Choose your solution at the top of this dialog box, select the positions, then enter the preflop actions to quickly import everything.

Starting Street

This setting determines the starting point of your solution.

You can set the stack and pot size in increments of 0.1bb. There are two constraints:

Open the range editor by selecting either player’s range in the Solution Builder. From here, you can edit, save, and load all player’s ranges.

Select either of the range previews to edit that player’s range.

You can assign labels to each range, such as IP, OOP, or seat names. Note that labels do not affect the solution. They are merely organizational tools.

There are several ways to work with ranges:

Note that different decision points (AKA nodes) may be simplified to different sizes depending on what’s best! We’re not telling the solver to choose the same size for every spot; we’re telling it to choose the best size in every spot.

By default, IP (In Position) inherits the betting tree settings from OOP (Out Of Position), and Turns/Rivers inherit the settings from the Flop. However, you can change that if you wish. Toggle these switches to customize the betting tree for each player and each street. Use the Flop, Turn, and River tabs to customize each street.

In the example below, OOP is using an automatically optimized river strategy, whereas IP will always have a 50% and 100% bet size, and a 66% raise size on the river.

GTO Wizard now supports preflop solving.

Multiway preflop solving requires an Ultra subscription, while heads-up preflop can be solved with an Elite subscription. However, anyone can solve spots at stack depths of 10bb or less to test the features.

To begin, select Preflop at the top of the page. The available tree builder options will change depending on whether you are solving heads-up or multiway preflop.

Most of the core configuration happens inside the Solution card. This is where you define the structure of the game before solving. You can choose the number of players dealt into the hand, set the stack sizes, configure the blinds and antes, add rake, and enable straddles or limps. You can also assign a profile to each player if you want to model exploitable tendencies instead of a purely equilibrium solution.

Equity Model

The Equity Model determines what the solver is trying to maximize. Chip EV is used when the goal is simply to win the most chips, which is the standard approach for most games. ICM assesses chip value using the Independent Chip Model, where chips are worth different amounts depending on survival pressure, making it the correct choice for late-stage tournaments.

Rake

The Rake settings are used for cash game solves. Rake represents the portion of the pot taken by the house at the end of the hand. You can configure both the Rake %, which is the percentage of the matched pot that is removed, and the Rake cap, which is the maximum amount of rake that can be taken in a single hand, measured in big blinds.

Stack Sizes and Blinds

Default Stack sets the starting stack depth in big blinds for all players. You can then override this value for individual positions if needed. SB/BB in bb controls the size of the small blind relative to the big blind. For example, this would be 0.5 in a standard 1/2 structure, or 0.4 in a 2/5 structure. These settings let you accurately model the blind structure of the game you want to solve.

Antes

The Ante setting controls how antes are posted. There are three formats available:

Straddles

The Straddle setting allows you to model games where an additional blind is posted before the cards are dealt. When a straddle is present, action starts to the left of the final straddler, and that player acts last preflop. There are three types of straddles to choose from:

Profiles

Profiles let you apply exploitable player tendencies to individual seats. This can be useful when you want to model non-GTO behavior or build trees against customized opponents. Profiles are configurable, so you can tailor them to the type of player or environment you want to study. Learn More.

Bet Sizes

The multiway preflop Bet sizes menu allows you to efficiently customize the preflop betting tree.

Presets

The Limps setting in Presets controls whether players are allowed to enter the pot by calling the Big Blind instead of raising. No limps means players can only raise or fold in an unopened pot. SB complete allows only the Small Blind, when action folds to them, to complete rather than raise. 1 limp + SB complete allows one non-small-blind player to limp, and also allows the Small Blind to over-limp.

Selecting Presets creates a pre-made betting tree that can be viewed and adjusted manually in the Tree edit section. The presets are human-guided heuristics that adjust with SPR. They’re designed to be a quick starting point, but they’re not fully optimized.

Fixed

Selecting Fixed opens a menu that allows you to customize the preflop tree with much more control. You can apply different sizing schemes to different positions, set in-position and out-of-position raise sizes separately, scale raise sizes when facing limpers or cold-callers, and choose which positions can limp or cold-call. Fixed mode supports the same bet sizing inputs as postflop trees: pot percentage (%), multipliers (x), big blinds (bb), and geometric sizes (e).

Select +Add New to create different rules for different positions. You can also copy bet sizing rules to other positions. Select which sizes should be copied copy over, and what positions they apply to, using this menu.

Calls

The Call settings determine which passive actions are allowed. Limp allows a player to limp in. CC 2b allows a player to cold-call a 2-bet without having already put money in the pot. CC 3b+ allows a player to cold-call a 3-bet or higher without having already put money in the pot. Turning a cold-call option off forces a raise-or-fold response, which is a standard simplification in many trees.

2-Bet

The 2-bet section controls open raises and isolation raises. The +ISO option increases the size for each limper. For example, this setting opens to 2.5bb plus 2bb for every limper.

3-Bet

For example, this setting 3-bets 3x in position and 4x out of position, with an extra multiple per cold-caller.

The 3-bet, 4-bet, and 5-bet+ sections control how you re-raise. These can be set separately for in-position and out-of-position play. You can also use +SQZ to increase the 3-bet size when squeezing.

Workflow

The best way to use the preflop solver is to build a solid default tree that you can reuse in a wide variety of spots. Start by setting the blind structure, rake, stacks, and other game details. Then customize the betting tree using the Fixed sizes menu. Create different rules by position, and use Tree edit at the bottom to fine-tune specific nodes as needed.

Once you’re satisfied with the tree, save it for later use. That gives you a reusable starting point for future solves. From there, you can layer on extra complexity like mixed stacks, exploitable profiles, or unusual sizings, only when needed.

For example, this tree was designed to be a solid starting point for 100bb cash games. Try it here.

Sharing

You can share your work with your colleagues, study partners, or students in two ways:

Select the Tree Edit dropdown to open this menu. This allows you to edit and preview the betting tree at specific nodes (decision points).

Select the Edit Node pencil icon in the bottom-right corner of any decision point.

You can add, remove, or edit the bet sizes from here. You can even delete the ability to check or fold, if you want.

Select the + icon to add a new size, and select the x button to remove an action. You can hover over the dropdown next to each size to change the bet sizing input between bb, pot %, geometric, or a multiple x.

Alternatively, you can Edit Nodes after a solution is already built. Again, just hover over any decision and press the edit node button.

Summary Page

The Summary tab is used to overview your entire solution. This shows each street’s ranges, stack, pot, and betting tree settings.
You can access the summary tab by selecting the show info button ⓘ in the solution selector:

Alternatively, select the Summary tab in the top-right corner of the solution builder:

The last step is to select the flop! Note that you can always change the board cards later! It only takes a few seconds to solve. Custom Solving is an exclusive feature only available to Elite Tier users. However, anyone can solve the Q♠T♠7♥ flop for free. All the features are fully available with any set of parameters on this flop.

Edit Solution

After you’ve solved a spot, you’ll notice an EDIT button in the Solution Selector. Select the EDIT button to open the solution builder and adjust the solver parameters.

Saving, Loading, & Organizing

You can organize many things in GTO Wizard with tags! For example, your preflop ranges, custom solutions, solver parameters, board filters, and training drills can all be organized with tags. Tagging allows you to assign useful categories to items, then filter for those items. We find tags to be a superior organizational tool compared to folders. Tagging permits many-to-many mapping (i.e., many tags assigned to many things). In contrast, folders permit only a one-to-many mapping (i.e., only one folder assigned to several things). This allows a much more flexible range of customization.

To create a new tag, click the Assign Tags button or select an already-assigned tag.

Keep in mind you can always load ranges from pre-solved solutions using the PREFILL function. However, many players prefer to use customized ranges.

To save your ranges, open the range editor, then select the save button in the top-left corner. Give it a name and save the range for later use! Saved ranges are displayed in the right panel. Click to load the range for whatever player is currently selected.

You can organize your ranges using tags. For example, here I have assigned a tag called “BB Defense” to the BB calling ranges in single-raised pots. Now I can filter with this tag to quickly see the relevant BB defense ranges!

Parameters define your custom solution settings! If you’ve spent any time building the perfect betting tree, you’ll want to save those settings for future use. To save your parameters, select the save button located in the bottom-left corner of the Solution Builder.

Select the Load button to open the saved parameters:

As always, you can organize and filter your saved settings with tags.

Open the Solution Selector in the top-left corner of Study Mode. Select the Custom Solutions tab.
Here the menu is divided into two spots: Saved solutions on the left, and recently solved solutions on the right:

Alternatively, you can add them to your saved spots by selecting the Saved Spots menu or pressing M.