The Postflop tab

Unlike preflop, where you can easily compare your game to a theoretical benchmark (the Poker Sciences Charts or your custom Charts, for example), it's always a bit more complicated for postflop which, let's be honest, due to its immense combinatorial complexity, never boils down to a single universal answer.

The most relevant benchmark then becomes the pool of regs at your stake. You play roughly the same way they do (same preflop ranges, same adjustments), which makes the comparison directly actionable.

Concretely, the Postflop tab puts this comparison at your fingertips by laying out three panels side by side for each situation: your game (Hero), the fish in the pool , the regs in the pool .

You can then read and compare how each of them plays, action by action.

Note that this chapter is fairly technical and is aimed at intermediate to advanced players. So don't worry if everything isn't crystal clear on the first read.

Preflop, the situation is closed. Positions and stacks are fixed, opponents' ranges are known (either the player hasn't acted yet and has 100% of their possible combos, or they have opened and their range is more or less identifiable).

Postflop, the number of variables explodes. A theoretical benchmark exists for a given preflop construction, but it's only valid if you played preflop exactly the way it assumed.

As soon as you deviate for good reasons (pool exploit, simplification, adjustment to a type of opponent), your postflop range no longer looks like the one used to compute the benchmark.

Concrete example

You decide to limp more often than GTO would preflop vs Fish , because they don't isolate enough.

Comparing your flop c-bet frequency to the GTO benchmark then becomes misleading: that benchmark was computed with a tighter preflop range than yours, so the "right" c-bet frequency is no longer the same.

For a postflop comparison to really be clean, you'd need a benchmark that adapts to your specific preflop construction.

In the meantime, the pool of regs at your stake is the best compass available. You share the same preflop ranges, the same opponents, the same stack constraints.

And if you limp more often than GTO vs Fish , the regs at your stake probably do the same: your deviations are roughly the same as theirs, which makes the Hero / Reg comparison relevant.

Visually, the three panels Hero / Fish / Reg are displayed side by side like this. Same structure, same metrics: you can compare your game to two reference groups, the fish and the regs.

Use case 1: find your leaks

As explained above, to find your potential leaks, you can compare your frequencies (the % next to each action) and your sizings (the color on the horizontal bar, which breaks down each action by bet size) with those of the regs.

A clear divergence is a signal: maybe you c-bet too much, too little, or you choose different sizings than they do.

Use case 2: analyze opponents' game

Beyond your own game, you can explore the fish and regs' game in detail.

The read happens at two levels: the frequencies first (how often each population takes each action, with which sizings), then the range composition when you click further in.

By clicking on an action (c-bet, check, donk-bet, etc.) or on a sizing within an action (small, medium, large, all-in for a c-bet for example), the corresponding range composition opens line by line by hand strength category, simultaneously across the three panels.

You can then answer specific questions: which combos do fish donk-bet with? What do they call river with vs 3-barrel? What does their check-raise range look like?

That's where exploitative strategies are built: if fish donk-bet mostly TP, your call becomes less profitable with A high.

If their check-raises are made of 0% bluff, you can fold wide until proven otherwise.

For both use cases, observing and forming hypotheses is easy: you spot a gap, you identify a pattern, you build an intuition.

Going from observation to concrete action (fixing a leak in depth or building a clean exploitative strategy) takes more work.

The previous section introduced the three Hero / Fish / Reg panels. Now we can look at how to navigate the Postflop tab and understand the role of each zone.

A. The sidebar: choose the situation to analyze

The sidebar works the same way as in the preflop tab: you'll find most Spin situations there, organized by position, pot type and street.

To make navigation more concrete, let's take a specific example: Hero on the BTN in 3-max . The logic will then be the same for the other positions and situations.

Here are 3 screenshots and, for each one, the situation that is selected:

The bottom of the panel also offers two filter panels that show up when needed: sizing faced for defensive situations (BB vs C-bet, BB vs check-raise, etc.) and preflop pot type (Limp Pot, Raise Pot, ISO Pot).

B. The three levels of information in the panels

For each selected situation, the Hero / Fish / Reg panels give access to three levels of information that complement each other.

1. Action frequencies (for the situation selected in the right side panel), with their sizing.

2. Range composition: with which hand strength Hero, the fish or the regs take the selected action.

By clicking on an action or a sizing, the corresponding range is broken down by category: straight+, trips, top pair / double pair, medium or low pair, A/K high, draw and trash.

For Hero, all your hands are known. For Fish and Reg, however, only hands revealed at showdown can be analyzed. Opponent hand strength categories are therefore partially biased: they don't represent an exact range, but the hands the opponent showed after going down this line.

The right read is therefore mostly to use this data as comparative hints, especially between Fish and Reg, and to stay cautious when comparing Hero directly to opponents.

3. The hand list, displayed below the three panels: it lists the actual hands matching the action (and the optional sizing) you selected, with date, cards, board, action line and EV.

Clicking a hand opens it in the Replayer.

You can filter the situation progressively: click on an action, then on a sizing, then on a hand strength category. With each click, the selection narrows down, and the hand list below updates with the matching hands.

Concretely, by clicking on c-bet then on the large sizing then on trash in the Hero panel, you see exactly the times you c-bet your trashes with a large sizing.

C. Filter Hero and Regs: vs Fish or vs Reg

As in the preflop tab, your Hero and the Regs can be filtered by type of opponent faced, from a dropdown menu in the panel header.

This filter applies simultaneously to the Hero and Regs panels. If you choose vs Fish, the Hero panel shows your hands played against a fish, and the Regs panel shows the hands where regs played against a fish.

If you choose vs Reg, in the same way, both panels switch to spots played against a reg.

Like all stats, you have to analyze your data carefully. And on postflop, one reflex is more central than any other: always trace the story back to preflop before concluding anything.

A postflop stat is the result of a chain of decisions that starts at preflop: your flop c-bet shapes your turn range, which shapes your 2-barrel, which shapes your river range, and so on.

In reality, if you c-bet flop at 90% while regs c-bet 70%, your turn range is saturated with weak hands that have no reason to keep going. A 2-barrel at 40% becomes mechanically logical.

If there's really a leak, it's on the flop, not on the turn. The right fix happens at the source, not at the output.

Provided it really is a leak: maybe you have good reasons to c-bet 90% (pool exploit, simplification), in which case there's nothing to fix.

Alright, a fairly technical chapter, hopefully I haven't lost you. And if I have, take your time before moving on, because the next chapter will probably be just as technical.

Put in the volume, play with the tool and you'll see it's not that hard to get the hang of. You'll quickly pull very interesting insights out of it about your own game and that of your opponents.

With the Postflop tab, you now have the tool to understand how you and the pool play each situation.

In the next chapter, we tackle the Global EV tab, really the big piece of the Leak Finder: another angle, which shows where your EV is built and where it's lost.