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Learn GTO preflop strategy

Solved preflop strategy, from the fundamentals up. Every piece names the conditions it was solved for, because a chart without its assumptions is an answer without a question.

Reference

Simple Preflop guide

How to open and navigate your range files in the Simple Preflop solver.

Glossary

Plain definitions for the preflop and solver vocabulary used across the library.

Fundamentals

What solved preflop strategy is and how to read it.

All fundamentals (3)

Fundamentals

Mar 17, 2026

Preflop Charts vs. Ranges: What's the Difference?

A preflop chart and a solved range are not the same thing. Learn how static charts differ from full solved ranges, and why the hidden assumptions matter.

Fundamentals

Feb 18, 2026

How to Read a Preflop Chart: the Hand Grid

Learn to read a preflop poker chart: how the hand grid is laid out, where pairs, suited, and offsuit hands live, and what a mixed-frequency cell means.

Fundamentals

Jan 14, 2026

GTO Preflop Ranges Explained

What GTO preflop ranges actually are, why solve accuracy and coverage matter, and how to use solved ranges for cash, tournaments, and Spin & Go.

Preflop spots

Opening, three-betting, squeezing, and defending, spot by spot.

All preflop spots (5)

Preflop spots

Jul 21, 2026

Squeeze Ranges Preflop by Position and Stack Depth

Squeezing over an open and a caller is a different play from a normal 3-bet. Learn how dead money widens the range, why sizing grows per caller, and where pools go wrong.

Preflop spots

Jul 17, 2026

3-Bet Ranges 100bb Cash: Value, Bluffs, and Blockers

How a solved 100bb cash 3-bet range balances value and bluffs, why blockers pick the bluffs, how IP and OOP sizing differ, and the leaks that make 3-bets readable.

Preflop spots

Jul 14, 2026

6-max Cash 100bb RFI Ranges by Position

How solved 6-max opening ranges widen from UTG to the small blind at 100bb, why each seat opens what it does, and the common over- and under-opening leaks.

Preflop spots

Jun 16, 2026

Preflop Raise Sizing: What the Solve Actually Uses

How stack depth, position, rake, and antes drive preflop raise sizing: open sizes, 3-bet sizing IP vs OOP, 4-bet sizing, and why the number changes as stacks shorten.

Preflop spots

May 19, 2026

Blind vs. Blind: SB vs. BB Preflop Ranges

Small blind vs. big blind is the widest, most complex preflop spot. Learn why the SB is at a disadvantage and how solved blind-vs-blind trees handle it.

Stack depth and ICM

Short stacks, push/fold, and what pay jumps do to a range.

Stack depth and ICM

Jul 24, 2026

Short-Stack Poker: the Math of 10bb to 20bb

The 10bb to 20bb zone is where tournaments are won and lost. Learn how postflop play shrinks, why small raise trees survive at 15bb to 20bb, and when it collapses to all-in-or-fold.

Theory

Why the solve says what it says.

Theory

Jul 10, 2026

How Rake Changes Preflop Ranges

Rake quietly rewrites correct preflop strategy. Learn how higher rake tightens opens, pushes the blinds toward 3-bet-or-fold, and why solved-for-rake ranges matter.

Study and practice

Turning solved output into something you can use at the table.

Study and practice

Jul 28, 2026

How to Memorize Preflop Ranges (Without Losing Your Mind)

You do not memorize 169 hands per spot by brute force. Learn to group ranges by position, action, and stack, and to reconstruct a range from its bottom boundary.

Study and practice

Apr 14, 2026

Browser Charts or Owned Files: Pick Your Preflop Workflow

Two ways to study solved preflop ranges: live charts in a browser, or files you own and open offline. What each one is good at, and how to choose.