William Toikka

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William E. (Bill) Toikka,
an American electrical engineer, computer scientist, chess player and former chess programmer, associated with Applied Data Research in Princeton, NJ. As member of the engineering honor society Tau Beta Pi, he graduated from Lehigh University in 1962 [1] [2].


Along with Fred Swartz, Victor Berman, Joe Winograd, Mike Alexander and Ira Ruben, William Toikka was co-author of the chess program CHAOS [3] , whose development started at RCA Systems Programming division in Cinnaminson, NJ. CHAOS was one of the strongest programs of the 70s and early 80s, using an unique, knowledge based and selective best-first, iterative widening approach [4] , keeping the search tree in memory.



CHAOS Team circa 1972.gif

CHAOS Team circa 1972 with UNIVAC 1108 Computer in Cinnaminson, NJ
From left, Fred Swartz (rear), Vic Berman (front), Bill Toikka, Ira Ruben (seated), Joe Winograd [5]

ACM 1979

Chaos vs Duchess.ACM 1979.jpg

CHAOS vs. Duchess at the ACM 1979 [6] David Cahlander, William Toikka, Fred Swartz and Tom Truscott


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