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a chess engine by David Norris which has been under development since its first release as WinChess [1] and Windows Chess in the first Microsoft Entertainment Pack in 1989 [2]. A group of Microsoft developers believed that, in order for Windows to succeed, a grassroots effort to create simple but fun entertainment titles needed to be made, and thus "Bogus Software" was born [3]. The byline for Bogus Software was that all of our applications could be "written in ten days plus a couple of two day follow-ups".
Ziggurat [4]


The present Ziggurat is a UCI chess engine re-written from the ground up in C that uses the PVS/ZWS search algorithm, aspiration windows, the null move heuristic, magic bitboards, and limited razoring.


Early Ziggurat Window [5]

See also

Forum Posts

External Links

Chess Engine



  1. ^ Download WinChess 1.01
  2. ^ The Microsoft Entertainment Pack for Windows
  3. ^ Bogus Software
  4. ^ Mesopotamia for Kids - Ziggurats
  5. ^ Septober - Computerschach by Herbert Marquardt

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