7. SIM Browser

How It Works

The Sim Browser is Lucid's game tree explorer. It gives you direct access to pre-solved GTO solutions across preflop and postflop situations so you can study any spot in depth, without needing to run a solver yourself.

Free users can browse all preflop situations and up to 5 postflop spots per day. A Lucid Pro subscription removes the postflop limit and unlocks custom turn and river resolves with Lucid's built-in solver.

Accessing the Sim Browser

1. 1
   Open Lucid and find the Sim Browser icon

   Look for the hand grid icon. On desktop it appears in the left-hand menu. On mobile it is in the bottom navigation bar.

Lucid · Sim Browser · Icon Location

2. 2
   Select a game type

   Tap the game type label in the top-left corner to open the selector. Options include 6-max cash, high rake, club sims, single size, and more. Tap Confirm to apply.

Lucid · Sim Browser · Game Type Selector

3. 3
   Select a stack size

   Just below the game type, tap the stack size label to switch between available stack depths for your chosen game type.

Lucid · Sim Browser · Stack Size

4. 4
   Navigate the game tree

   Use the node navigation controls at the top of the screen to build your spot. Select actions for each position to move through the tree toward the node you want to study.

Navigating the Game Tree

The node navigation bar at the top of the screen shows you where you are in the hand. Each position acts in sequence. Select an action for a position to advance to the next decision point.

Lucid · Sim Browser · Postflop Node

As you navigate, keep an eye out for colored dots on action buttons:

• Red dot: This action ends the game tree. No further nodes exist (e.g. a preflop fold).
• Blue dot: A postflop node exists but is not available in the current sim pack. Most common in multi-way spots.

Postflop Info Panel

Once you reach a postflop node, additional information appears next to the board:

• Pot size: The total pot going into the flop, in big blinds.
• SPR: Stack-to-pot ratio. How many pot-sized bets remain in effective stacks.
• Geometric bet size: The single bet size as a percentage of pot that, if used on every remaining street, results in an all-in by the river.

Lucid · Sim Browser · Postflop Info Panel

Reading the Hand Grid

The 13x13 hand grid shows the solver's recommended strategy for every hand combination in the active player's range. Each cell is color-coded by action, and the height of each color bar represents the frequency of that action.

You can interact with the grid in two ways:

• Hover over any cell to preview that hand's action breakdown.
• Click a cell to lock it in and see the full frequency breakdown for that specific hand.

Lucid · Sim Browser · Single Hand Selected

Hand Classes and Range Filters

The right panel offers three tabs for more targeted analysis:

Hand Classes tab

Breaks the active range into categories such as sets, two pair, top pair, draws, and air. Click any hand class to highlight only those hands on the grid. Multiple categories can be selected at once.

Lucid · Sim Browser · Hand Classes Tab

Strategy View tab

Lets you filter the range by suit combinations. Clicking a suit filter shows only hands where both hole cards share that suit. Useful for isolating flush draw behavior on wet boards.

The Strategy View tab also contains the height display and rounding controls:

Height display options

• Actual: Bar heights reflect true frequencies. Most accurate view.
• Normalized: The highest-frequency hand is scaled to fill its cell; all others scale proportionally. Easier to read when frequencies are small.
• Full: Every hand displays as if played at 100% frequency. Removes frequency weighting.

Lucid · Sim Browser · Strategy View · Normalized Height

Rounding options

• No rounding: Raw solver output. Maximum accuracy.
• 5%: Rounds to nearest 5%. Cleans up mixed strategies significantly.
• 10%: Rounds to nearest 10%. Good for studying simplified ranges.
• 25%: Rounds to nearest 25%. Best for easy-to-execute strategies.

Equity and EV heat maps

At the bottom of the screen, Lucid displays equity and EV totals for each player's range at the current node. Clicking Equity or EV switches the hand grid to a heat map. Greener cells indicate hands with higher equity or EV.

Custom Turn and River Resolves

On turn and river nodes, a Resolve option becomes available. This is powered by Lucid's built-in solver and lets you generate an unexploitable strategy for a specific runout using custom bet sizes for each player.

1. 1
   Navigate to a turn or river node

   Build your spot through the game tree. The Resolve option only appears at turn and river decision points.
2. 2
   Select the runout card

   Choose the specific turn or river card you want to study.
3. 3
   Set bet sizes for each player

   Choose which bet sizes each player can use. Tap the pencil icon to enter custom sizes. You can set multiple sizes per player or restrict each to a single option.
4. 4
   Tap Resolve

   Lucid's solver runs and returns an unexploitable strategy based on your inputs within a few seconds. Results appear in the hand grid and strategy panel.

Next Steps

After exploring a spot in the Sim Browser:

• Use Create Custom Drill from the three-dot menu to practice the node with active reps
• Check the Hand Classes tab to understand which hand types drive the strategy
• Run a custom resolve on the turn or river to model specific opponent sizing tendencies
• Review Progress Tracking to see how your drill performance trends over time