GTO Preflop Ranges Explained: How to Read and Use a Starting-Hand Chart

If you have ever opened a GTO preflop chart for the first time, the reaction is usually the same: a grid of coloured squares that looks more like a spreadsheet than a poker strategy. But those charts are one of the most useful study tools in the modern game, and once you understand what they are actually telling you, they become far less intimidating. This guide explains what GTO preflop ranges are, how to read a starting-hand chart, why your position changes everything, and how to check — honestly — how closely your real play matches the theory.

What "GTO preflop range" actually means

GTO stands for game theory optimal. A GTO preflop range is, in plain terms, the set of starting hands a mathematically balanced player would play a certain way from a certain seat — which hands to raise, which to call, and which to fold. It is not a magic formula that wins every pot. It is a baseline: a way of playing that cannot be easily exploited, which you then adjust based on the specific opponents in front of you.

The 13x13 grid you see on a chart maps every possible two-card starting combination:

• The diagonal is your pocket pairs (AA, KK, QQ, down to 22).
• The upper-right of the grid is suited hands (AKs, AQs, and so on).
• The lower-left is the offsuit versions (AKo, AQo, ...).

Colours or shading show the recommended action for each hand — typically raise, call, or fold. Read that way, the chart is just a picture of a decision you would otherwise have to make from memory dozens of times an hour.

Position is the whole story

The single biggest thing a preflop chart teaches is that the same two cards are a raise from one seat and a fold from another. Why? Because position — where you sit relative to the dealer button — determines how many players still get to act after you and how often you will play the rest of the hand with information advantage.

• Early position (UTG): you act first on every later street and have many players behind you who could wake up with a strong hand. Correct ranges here are tight — mostly premium pairs, big suited broadways, and strong aces.
• Middle position: fewer players left to act, so the range widens to include more suited connectors and medium pairs.
• Late position (cutoff, button): you will often have position for the whole hand, so you can profitably open a much wider range, including many suited hands and weaker offsuit holdings.
• Blinds: you are forced to act with money already in, so defending and 3-betting ranges become their own study.

A good set of charts, like our free GTO Preflop Ranges tool, gives you a separate range for each position so you can see this widening effect for yourself instead of memorising it in the abstract.

How to actually use a chart (without going robotic)

Charts are a study aid, not a script to follow blindly at the table. Here is a sane way to use them:

1. Learn one position at a time. Start with your opening ranges from the button and the cutoff, where you play the most hands, then work backwards toward early position.
2. Understand the "why" behind the edges. Notice which hands sit right on the border between raise and fold. Those marginal hands are where most of your money is won and lost, and where opponent tendencies matter most.
3. Deviate on purpose, not by accident. If the table is playing passively, you can open wider than the chart. If three aggressive players sit to your left, tighten up. The chart is your anchor; your reads are the adjustment.
4. Review your hands afterwards. The real learning happens away from the table, comparing what you did to what a balanced range would have done.

For the maths behind specific spots — equity, outs, and win probability once the flop comes — pair your preflop study with our Poker Odds Calculator.

Closing the gap between theory and your real game

Knowing the chart and playing the chart are two different things. Under pressure, most players open too many hands from early position and fold too many from late position — the exact opposite of what a balanced range recommends. The only way to catch that drift is to keep a record of how you actually played.

This is where honest, manual tracking matters. When you log your sessions and review your play by hand, you can start to see whether your real starting-hand selection lines up with what you have been studying. Manage Bankroll is a manual tracking tool — you enter your own results and notes, and it turns them into performance history you fully control. Nothing is auto-imported and nothing is connected to any account; you add, edit, or delete every entry yourself.

Over time, the combination of studying a GTO chart and reviewing your own tracked results is what turns theory into instinct. You stop asking "should I play this hand?" and start knowing — and, just as importantly, you notice quickly when your discipline slips.

Study smart, track honestly

GTO preflop ranges are not about playing like a machine. They are about giving yourself a solid, unexploitable default so that every deliberate deviation is a choice rather than a leak. Learn the charts one position at a time, understand why the borders fall where they do, and keep an honest record of how closely you follow them.

Start with the free GTO Preflop Ranges charts, then track your sessions to see how your real game measures up — privately, manually, and entirely under your control.