Counting Cards at Blackjack

Counting cards in Blackjack refers to the practice of following every card that is taken from the deck. This aids the player in understanding what cards are likely to be left in the deck and their number.
There are four systems to counting cards:
1.Knockout Count: in this system, when you count the whole deck the resultant number is not zero.
2.Hi-Lo Count: this is best for novices. Cards are grouped and each group is assigned a count value. There are here groups.
3.Hi-Opt I Count: for expert players. Similar to the Hi-Lo Count but has more researched methods that gives precision. There are more card values and tenets in this count.
4Hi-Opt II Count: this is the most sophisticated of all the counting systems. It needs a deep level of concentration. It not only has counting but some cards also have the value 2.