First, I track 8s and 9s together. This is like Tarzan's count. Just the third group is presented in side count form. Because you count every rank, the variance is reduced and the P/E is greatly improved. The only drawback is when you buy insurance using AccuZen (short for Accurate Zen), even if you are right, the dealer downcard can be an ace. But Zen put face card double weight the ace, so the problem is not severe. I invent this counting system and divide it into five levels. Level 1 is the standard Zen. The differences among level 3, level 4 and level 5 are the numbers of the included indexes. Level 3 has the most important indexes. With penetration 84% (1D cut off 6D), PA rule set, Level 3 AccuZen has SCORE of $53.50.