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  1. Newsgroups: sci.math
  2. Path: sparky!uunet!haven.umd.edu!darwin.sura.net!Sirius.dfn.de!Urmel.Informatik.RWTH-Aachen.DE!tabaqui!dak
  3. From: dak@tabaqui.informatik.rwth-aachen.de (David Kastrup)
  4. Subject: Re: Chess Problem
  5. Message-ID: <dak.716324101@tabaqui>
  6. Sender: news@Urmel.Informatik.RWTH-Aachen.DE (Newsfiles Owner)
  7. Nntp-Posting-Host: tabaqui
  8. Organization: Rechnerbetrieb Informatik  /  RWTH Aachen
  9. References: <BuFpLp.9nI@ecf.toronto.edu>
  10. Date: 12 Sep 92 18:55:01 GMT
  11. Lines: 11
  12.  
  13. rairan@ecf.toronto.edu (RAI Ranjan) writes:
  14.  
  15. >In celebration(?) of the Fischer-Spasky rematch in Yugoslavia, I thought I'd post
  16. >a little chess problem I encountered in high school.
  17. > 
  18. >Chess Problem:
  19. >     Eight rooks are placed at random on a chessboard.  What is the probability that
  20. >   no two rooks can attack one another?
  21. There are {64\over8} valid configurations, of which 8! configurations
  22. have the desired property (in first column, 8 places to choose,
  23. in second 7...)
  24.