Preflop Lab

No canned charts, no fake precision — this is a workbench. Paint a range on the grid, give your opponent one too, and run the actual math: Monte Carlo range-vs-range equity, computed live on your device. When you're ready to go deeper, export both ranges straight into a free open-source postflop solver and study the real game tree. Do the work yourself; it sticks better that way.

Brush weight 100% Paint at 100% for always, 50% for half the time — drag across the grid to paint.

Board (optional)

Take it postflop

These buttons copy your ranges in standard solver text format (AA,AKs,A5s:0.5,…) — paste them into WASM Postflop, a free open-source GTO solver that runs entirely in your browser, as the OOP and IP ranges. Build here, solve there. Or feed them to a cloud engine like Deepsolver for full postflop solves in seconds.

Prefer to start from pro-built ranges instead of a blank grid? Poker Academy’s preflop library gives you cash- and tournament-ready charts to paint from.

Partner-tool links above are affiliate links — they support the site at no extra cost to you.

Lab Notes

The fine print, minus the fine print energy.

Why no preflop charts?

We had them. They were simplified exploitative charts dressed up in GTO clothing, and that bugged us. Real preflop solutions are mixed-frequency monsters computed on server farms — anything simpler is somebody's opinion in a table. The Lab takes the opposite approach: you build the range, the math checks it. Your opinion, properly audited.

How accurate is the equity number?

It's a Monte Carlo estimate over 100,000 random runouts, which lands within about ±0.3% of the exact answer — tighter than anyone's read on your river bluff. Run it twice and the numbers may wiggle a decimal; that's randomness doing its job, not a bug.

What are the "Starting Points"?

Common opening-range shapes by position — reasonable defaults, not gospel. They exist so you don't start from a blank grid. Edit them ruthlessly. The whole point of the Lab is that the final range is yours.

What's WASM Postflop and why are you sending me there?

It's a genuinely free, open-source postflop GTO solver that runs in your browser — the kind of tool that used to cost a monthly subscription. We're not affiliated; it's just excellent. The Lab speaks its range format natively, so the two work as a pipeline: rough out your preflop ranges here, then hand them to the solver to study flop, turn, and river strategy for real.

Do my saved ranges leave my device?

Only if you sign in and hit Save — then they're stored in your account so you can pull them up anywhere. The equity math itself always runs locally in your browser. Your reads stay your reads.

Take it postflop

Lab Notes

Get the inside track