Blocker

A card you hold that makes some of their hands less likely, because that card cannot be in their hand too.

Example

You hold the A♠ on a board with three spades, so they cannot have the nut flush.

Also written: blockers, card removal, blocking.

Related

Practise it in 5 minutes Count the combos, a short free lesson.

Quads is for adults, 18 and over. It teaches with play chips only: there is no real money, ever.