JACK 6.2

                                             by Hans Kuif, Wim Heemskerk and Barry Westra

Jack was written by Hans Kuijf from the Netherlands. He started programming Jack in 2000 with one goal in mind: to create the best computer bridge program in the world, both in bidding/play  and in features. The bridge skills of World Champion Berry Westra and Dutch top-player Wim Heemskerk resulted in a program that took the top from the start, yet it is still continuously being improved.

Jack has participated in ACBL World Computer Bridge Championships where it reached the semifinals at its debut in 2000 (3rd). After another hard years work Jack won the title in 2001 and successfully defended it until 2005 (World Champion in 2001, 2002, 2003 and 2004). After 4 years of domination Jack's reign was broken by WBridge5 from France in the final of 2005 (2nd). Jack recaptured the title in 2006. In 2008 Jack won the Round Robin far ahead of the field but lost the final with a smaller margin. In 2009, it was Jack who reclaimed the title in a direct match against WBridge5, succesfully defending it again in 2010, 2012, 2013 and 2015.

Jack is a commercial program. 

Jack is only available on Windows. Demo for download.

Jack supports 21 systems, among those are SAYC, 2/1, 5 Card Major, British and Dutch ACOL and Polish Club. The conventions used are connected to type of selected system.

Main Features

>  Playing strength can be set to 15 different Levels 

>  Bidding aggressivnes and Speed of bidding, lead and play is configurable

>  Play random deals

>  Play included tournaments. More can be added.

>  Let Professor Jack analyze your bidding and play and give advice.

Jack is probably the strongest and best of the commercial programs available today.

"The Principle of Restricted Talent is" a book about a bridge robot that reminds of Jack.

Irish player Eamon Galligan plays against Jack: