This shows the crucial plays in blackjack, according to several sources. For the best information, see The Wizard of Odds.
This applet shows the hard hands, splits and soft hands that you must know in order to play blackjack successfully. This trainer is essentially a set of flash cards for the common situations. It doesn’t play out each hand, since additional cards don’t change the rules of play. It doesn’t use a real distribution of cards, since 76% of the hands dealt are simple hard hands. Instead it chooses on the the 58 rules of play and constructs a hand based on that rule.
The applet source is available