In this 8-deck blackjack game, the cards in the dealer's hand are all visible to a player. . As a player has obvious advantages over the dealer, a blackjack. The strategies. The scientifically devised unbalanced K-O count can be used profitably anywhere blackjack is played: Las Vegas, Atlantic City, Mississippi, riverboat casinos. Only a man with a complete knowledge of the game and the best techniques for teaching the game could write the perfect book for Blackjack player.