In 1985, the famous chess player David Levy beat a world champion chess program in four straight games by using orthodox moves that confused the program. What was the name of the chess program? A. Kaissa B. CRAY BLITZ C. Golf D. DIGDUG E. None of the above

The correct answer is: A. Kaissa

Kaissa was a chess program developed by Walter Browne and David Slate. It was the first chess program to beat a grandmaster in a match, defeating Bent Larsen in 1974. In 1985, Kaissa was defeated by David Levy in four straight games. Levy used orthodox moves that confused the program, which was not used to playing against such a human-like style of play.

B. CRAY BLITZ was a chess program developed by Cray Research. It was the first chess program to beat a grandmaster in a tournament game, defeating Ulf Andersson in 1982. However, CRAY BLITZ was not as successful against David Levy as Kaissa was.

C. Golf is a video game developed by Atari. It was released in 1980 and is one of the most popular video games of all time. However, Golf has nothing to do with chess.

D. DIGDUG is a video game developed by Namco. It was released in 1982 and is a side-scrolling platform game. However, DIGDUG has nothing to do with chess.

E. None of the above is the correct answer.