Preflop Opening Ranges, Explained

A preflop opening range is the set of hands you raise with first into the pot. The core principle is simple: the earlier your position, the tighter your range, because more players are left to act behind you. The later your position, the wider you can open.

Why position sets the range

When you open from early position, several opponents can still wake up with a big hand. You need stronger holdings to justify entering. From the button or, in heads-up, from the small blind, only one player is left, so you can open a very wide range profitably.

Building a sound range

Rank hands by raw strength and playability:

• Always open: big pairs, big broadways (AK, AQ, KQ), strong suited aces.
• Open wider in late position: smaller pairs, suited connectors, suited gappers, weaker broadways, more offsuit hands.
• Trim in early position: drop the speculative and dominated offsuit hands.

Suited hands outperform their offsuit versions because they make flushes and play better postflop, so they enter your range earlier.

Open-raise sizing

A consistent raise size keeps your range balanced and your decisions simple. The exact size matters less than using the same size with your whole opening range so you don't reveal hand strength by how much you raise.

Heads-up note

In heads-up, the button (small blind) acts first preflop but last postflop, and opens an extremely wide range — often the large majority of hands — because position postflop and the single opponent make wide opens profitable.

Common mistakes

• Opening too tight from late position (leaving money on the table).
• Opening too loose from early position.
• Changing raise size based on hand strength.