Deep Junior is a computer chess program authored by the Israeli programmers Amir Ban and Shay Bushinsky. Grandmaster Boris Alterman assisted, in particular with the opening book. The idea of creating a chess-playing machine dates back to the eighteenth century. ... Boris Alterman (born April 5, 1970) is an Israeli chess Grandmaster, advisor of the Deep Junior chess program. ...

Deep Junior won the World Computer Chess Championships in 2002 and 2004, organised by the International Computer Games Association. Championship Results 2004 Location: Bar-Ilan University, Ramat Gan Israel Winner : Deep Junior 2003 Location: Graz, Austria Winner : Shredder (chess) 2002 Location: Maastricht, Netherlands Winner : Deep Junior 2001 Location: Paderborn, Germany Winner : Shredder (chess) Categories: Computer chess ...

In terms of raw power, 'Deep Junior' is dwarfed by other earlier programs such as Deep Blue (which can calculate 200-300 million combinations per second). Deep Junior, which is designed to run on commodity SMP multiprocessor computer hardware, calculates only around 2-3 million combinations per second, but is more selective about the positions it analyzes. Deep Blue was IBMs chess playing computer. ... SMP is a Three letter abbreviation which can refer to the following: In computing: Symmetric multiprocessing, the use of multiple CPUs. ... Multiprocessing is traditionally known as the use of multiple concurrent processes in a system as opposed to a single process at any one instant. ...

According to Bushinsky, one of the innovations of Deep Junior over other chess programs is its way to count moves. It counts orthodox, ordinary moves as two moves, while an interesting move is one or even less. In this way interesting variations are analysed more deeply than less promising lines. This seems to be a generalization of search extensions already used by other programs.

Another approach they claim to use is 'Opponent modelling'. Deep Junior might play moves which are not objectively the strongest but that play more towards the weaknesses of the opponent.

In 2003 Deep Junior played a 6-game match against Garry Kasparov which resulted in a 3-3 tie. 2003 is a common year starting on Wednesday of the Gregorian calendar. ... Garry Kasparov Garry Kimovich Kasparov (, pronounced with stress falling on the second syllable: kas-PA-rov) (born April 13, 1963) is a chess grandmaster and one of the strongest chess players in history. ...