  For a balanced cardcounting system we study the random variable of the true
count after a number of cards are removed from the remaining deck and we prove
a close formula for its standard deviation. As expected, the formula shows that
the standard deviation increases with the number of cards removed. This creates
a "standard deviation effect" with a two fold consequence: longer long run and
presumably larger fluctuations of the bankroll, but a small gain in playing
accuracy for the player sitting third base. The opposite happens for the player
sitting first base. Thus the optimal position in casino blackjack in terms of
shorter long run is first base.
