Preflop Opening Ranges by Position: A Practical Guide

Your opening range should get wider the closer you sit to the button. Fewer opponents remain to act behind you, and you are more likely to have position after the flop, so a weak-looking hand costs less and earns more from a late seat than from an early one. This guide explains why, shows what the difference looks like in numbers, and covers the mistakes that make most players’ ranges too loose in the wrong seats and too tight in the right ones.

Every example here assumes a 6-max (six-player) cash game, 100 big blinds (bb) effective stacks, and a standard raise-first-in (RFI) situation, meaning everyone before you has folded. A tournament, a deeper game, a straddle, or a table that defends aggressively will shift the borders. Treat the sample ranges below as illustrations of a method, not as a chart to memorize and apply everywhere.

Poker Position Names and What an Opening Range Is

An opening range is the set of hands you raise with when no one has entered the pot. Thinking in ranges rather than single hands matters because opponents cannot see your cards. They can only reason about all the hands you could plausibly hold from a given seat.

In a 6-max game the seats, in order of action preflop, are under the gun (UTG), the hijack (HJ), the cutoff (CO), the button (BTN), the small blind (SB) and the big blind (BB). In a nine-handed game, extra seats such as UTG+1 and middle position (MP) sit before the hijack. The seat name tells you how many players still have to act after you: five behind UTG, two behind the button, and one behind the small blind.

Range size is usually quoted as a percentage of the 1,326 possible two-card starting combinations. A pocket pair such as 7♠ 7♥ has six combinations, a suited hand such as A♠ K♠ has four, and an offsuit hand such as A♠ K♦ has twelve. Counting combinations, not hand names, is how you measure how wide a range really is.

How Position Changes Which Hands You Open

Two forces push opening ranges wider as you move toward the button. The first is the number of players left to act. Each opponent behind you has some chance of holding a hand strong enough to 3-bet (re-raise) or call, and with five players behind, that chance accumulates. From the button only the blinds remain.

The second force is position after the flop. When you open from the cutoff or button and get a call, you usually act last on every later street. Acting last lets you see what your opponent does first, control the pot size, and realize more of your hand’s equity (its share of the pot over time). Out-of-position hands from early seats realize less.

The table below shows illustrative, deliberately simplified sample ranges for a 6-max, 100bb game. They are examples for counting combinations, not solver output, and real strategies include mixed frequencies and vary by game.

Here is how the totals work. For UTG, 66 through AA is nine pairs times six combinations, or 54. AJs, AQs and AKs are three suited hands times four, or 12. KQs adds 4, and AQo plus AKo are two offsuit hands times twelve, or 24. The sum is 94 combinations, and 94 ÷ 1,326 is about 7.1%. The sample button range is more than twice as wide at 218 combinations, or about 16.4%.

Many solver-informed charts open considerably more than these samples, especially in late position. The point of the comparison is the shape: each seat later adds hands, and the added hands are usually suited and connected hands with playability rather than weak offsuit holdings.

Example Hand: The Same Hand From Two Seats

Suppose you are playing a 6-max cash game with 100bb effective stacks and hold 10♥ 8♥. The action folds to you.

From UTG, this hand is a fold in most standard strategies. Five players act behind you, you will often be out of position if called, and the hand makes weak top pairs and weak flushes that lose to better holdings when the money goes in.

Now move the same hand to the button, with action folding to you. The only players left are the blinds. The pot holds 1.5bb (0.5bb small blind plus 1bb big blind), and you raise to 2.5bb. Your raise needs to work about 62.5% of the time to break even if every call beats you: bet ÷ (pot before the bet + bet) is 2.5 ÷ (1.5 + 2.5) = 0.625. That is a pessimistic baseline, because 10♥ 8♥ has real equity and position when called, so the true requirement is lower. Against two blinds who fold often, opening is generally standard.

The hand did not change. The seat, the number of opponents, and the position did.

How to Apply Opening Ranges at the Table

Start by confirming the game you are in: number of players, stack depth, and whether there is an ante or straddle. A range built for 100bb in a six-handed game is the wrong tool for a nine-handed, short-stacked or straddled game.

Next, look at the players behind you. A button who 3-bets aggressively makes your cutoff opens less profitable, and two passive blinds make button steals more profitable. Adjust the borderline hands, not the strong ones. Pocket aces and ace-king are opens in every seat. The hands you tune are the ones near the edge of the range, such as suited gappers, small offsuit broadways and the weakest suited aces.

Finally, choose a consistent open size. Many online games use something near 2 to 2.5bb, and live games often use larger raises, so sizing conventions vary by room and format. Keeping your size the same across hands prevents opponents from reading your holding from the bet.

Common Mistakes With Preflop Opening Ranges

Opening the same hands from every seat is the most common error. A range that is correct on the button is too loose from UTG, and a range tuned for UTG leaves a lot of value uncollected on the button.

Playing too many weak offsuit hands is the second. Hands like K♦ 6♣ or 9♠ 4♥ have little playability, make second-best pairs and cannot make flushes. Suited and connected hands are better borderline opens because they can make strong draws and disguised hands.

Ignoring the blinds’ tendencies costs money too. A blind who never folds to steals makes wide button opens unprofitable, while one who folds too often makes them almost automatic.

Judging a range by one result is a final trap. An open that loses a pot is not proof the open was wrong, and an open that wins is not proof it was right. Variance means correct decisions lose often in the short term.

Why Preflop Range Charts Need Context

Free preflop range charts are useful because they give you a structured starting point, but every chart embeds assumptions about stack depth, rake, ante structure and opponent behavior. In most online cash games, rake is taken from the pot and can shrink the profit from marginal opens. In many live games it is a time charge or larger percentage, and the effect on marginal hands is bigger.

Live play often rewards slightly tighter early-position opens because opponents tend to call more and fold less. Online, aggressive regulars may 3-bet more, which shifts the borders in the other direction. Neither environment is universally right, so check which assumptions your source uses before copying its numbers.

Poker involves real financial risk, and no opening range removes variance. Use ranges to make more consistent decisions, and play only with money you can afford to lose.

What to Study After Opening Ranges

Once your opening ranges feel solid, the natural next questions are what to do when someone raises before you, and how to continue after the flop. Studying 3-betting, defending the big blind and continuation betting builds directly on the ranges described here. Each of those topics asks you to work out which hands from your range continue, and why.