The Omega II card counting system was made popular in Bryce Carlson's book Blackjack for Blood. It is considered an advanced counting strategy, not suitable for beginners because of its complexity, but accurate.
The point values are distributed as per the table below:
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | A |
+1 | +1 | +2 | +2 | +2 | +1 | 0 | -1 | -2 | 0 |