Capped vs. Uncapped Ranges

A range is "capped" when it can't contain the strongest hands — there's a ceiling on how good it can be. It's "uncapped" when the very best hands are still possible. Spotting which player is capped is one of the most profitable reads in poker, because capped ranges can be attacked relentlessly.

How ranges get capped

A range usually caps itself through the actions taken. For example, a player who just calls (rather than raises) on an earlier street often caps their range, because they'd typically have raised their strongest hands. Checking back can cap a range too. By contrast, a player who took the aggressive line keeps their strong hands in — staying uncapped.

Why capped ranges are vulnerable

If your opponent can't have the nuts and you can, you hold the nut advantage, which lets you apply maximum pressure: big bets and overbets. They have to fold a lot, because they can't credibly continue against bets that threaten their stack with a range that tops out at medium strength. Capped opponents bleed chips to aggression.

Protecting your own range from being capped

The defense is to keep some strong hands in lines that look weak — for instance, occasionally just calling or checking with a strong hand so your "weak" actions aren't always weak. This is why protecting your checking range matters: an always-weak checking range is a capped, exploitable range.

How to attack a capped range

• Bet bigger and more often.
• Use overbets when you also hold the nut advantage.
• Bluff more, since they must fold their capped holdings.

The takeaway

Watch the actions that cap a range — passive calls, check-backs — and attack the player who can't have the nuts while you can. Equally, protect your own range from capping by mixing strong hands into your passive lines.