Hole carding

In some games, like stud poker, casinos normally have rules against rubbernecking or having a confederate stand behind an opponent to signal hole cards.

Blackjack players must usually make playing decisions based on only seeing one of the dealer's cards (the upcard).

This technique is not applicable in most games outside of the United States where the second dealer card is normally not dealt until all players have played.

[1] A modification called "spooking" refers to a partner with a better view peeking at the hole card in the same circumstance and communicating the information to the player.

[3] Newer methods of hole-carding concentrate on observation before the down card is placed under the upcard.

Partial hole card tables contain ten columns as the dealer's total hand is not known with complete certainty.

A different set of tables must be used depending on the information acquired from the hole card.