Abstract: A playing card system for use in the game of Blackjack is provided. A set of playing cards having the standard suit and rank arrangement is modified such that both surfaces of each card are marked with that card's particular suit and rank. Thus, the rank and suit of all cards in play remain exposed, which effectively eliminates many types of cheating. It is particularly effective against card marking, flashing and switching. The set of cards is further modified so that ace and “10” value cards are marked with identifying indicia such that an early determination that the dealer has “21” can be made. A masking member is provided for placement over the dealer's hole card so that its rank and suit can remain concealed while the determination of early “21” is made. The invention further comprises a card shoe which is modified so that the determination of early “21” can be made before the hole card is dealt from the shoe.