Effect of Blackjack Indexes
do Blackjack indexes affect advantages of counts?
The more indexes that a card counter uses, the higher the advantage.
So obviously the advantages at each true count must change. This
chart shows the advantages by true count, but only for six decks.
The red line is the same as the red line on the chart on the previous
page the advantage using full indexes (over 100.) The
green line represents data for the Illustrious 18 and Fab 4 indexes
the most valuable indexes according to Don Schlesinger. The
blue line displays the advantages using no indexes playing
Blackjack Basic Strategy. In all cases, the trend is higher advantage
at higher counts and the more indexes the higher the advantage.
But the effect of using more indexes is different at different counts.
At a count of zero it makes little difference as you are playing
very close to Basic Strategy. At higher counts, we see that the
most important 22 indexes supply most of the gain. In fact at True
Counts of +4 and +5 the red and green lines are very close. This
is important since TCs of +4 and +5 should be where most of your
max bets are placed. At the very low counts, full indexes make a
much larger difference. But, you should avoid playing at these counts.
is the change in advantage from TC to TC?
This chart is like the second chart on the previous
page. But here we see the increase in advantage at each count
displayed for full, partial and no indexes. Again, a common card
counting rule of thumb is that the increase at each count is about
.5% for each count. As we can see here this depends on the number
of indexes. This is not surprising since the effect of indexes kicks
in at different points. The red bars in this chart are the same
as the red bars in the chart on the previous page. The green and
blue bars show that the gain in advantage per true count is much
less with fewer indexes. However, we also see that the gain in advantage
is very close between 100+ indexes and 22 indexes at the most important
true counts. As we saw on the True Count
Frequencies page, the high and low counts rarely occur.
- Six decks, S17, DAS, LS, 4.81/6, Hi-Lo max indexes, trunc, half-deck
- Two decks, H17, DAS, 1.5/2, Hi-Lo Ill18 indexes, trunc, half-deck
- Single-deck, H17, 2 players, 4 rounds, Hi-Lo max indexes, trunc,
- Single-deck, H17, 4 players, 2 rounds, Hi-Lo max indexes, trunc,
- Ten billion rounds for six and two decks, five billion rounds