It results in some counter-intuitive rules. You have sixteen, the dealer is showing a ten. The chart says hit. You have a pair of aces or 8's, and the dealer is showing a ten. Played correctly, this system assures you of being at no more than a 2 percent disadvantage against the casino.
Most players prefer to follow their instincts.
Some players prefer to count cards as they are played at the Black jack table, adjusting their bets according to how many tens and aces are left to be played in a given hand. A simpler version counts 9's and 10's in one column, aces in another, and hands played on your fingers. When the count is high, you should increase your bets. Reprinted with permission of Merritt Publishing.