Quite simply the strongest bridge playing software available! Significant improvements made since version 3. Compose your own convention card using nearly 100 different conventions. Many built in cards like Standard American Yellow Card, Acol, 2/1 GF, Moscito (a strong club system) and Jack's own convention card (used to win the World Computer Bridge Championships in New York 2004). Adjustable lead system and signal methods. Hints both during the auction and the play. Over 30 levels of play. Create your own tournaments. Duplicate, imps, imp pairs and more! Just enter the number of tables. Play rubber bridge (Chicago available as well). The fastest double dummy solver in the world! Instantly shows you how many tricks can be made from any position. Determine the par score of a deal. Jack determines with open cards the optimal contract for both sides. Free automatic updates of the program available at the click of a button!