FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in          Games  Calendar Log in to check your private messages    How many grains of sand vs number of Sudoku          Sudoku Programmers Forum Index -> The mathematics of sudoku View previous topic :: View next topic   Author Message ChPicard Joined: 12 Mar 2008 Posts: 82 : Location: Montreal, Canada Items Posted: Thu Mar 19, 2009 10:22 am    Post subject: How many grains of sand vs number of Sudoku For the answer look at : http://visindavefur.hi.is/svar.asp?id=4803 But we don't know how many 17 given sudoku grids are valid, because it is too complicated to solve this question. ChPicard Back to top gsf Joined: 18 Aug 2005 Posts: 411 : Location: NJ USA Items Posted: Sun May 24, 2009 1:00 pm    Post subject: Re: How many grains of sand are there in the world? ChPicard wrote: For the answer look at : http://visindavefur.hi.is/svar.asp?id=4803 But we don't know how many 17 given sudoku grids are valid, because it is too complicated to solve this question. just looked at this was this guy guestimating grains of sand (6.63x10^22) or sudoku grids (6.67x10^21) Back to top ChPicard Joined: 12 Mar 2008 Posts: 82 : Location: Montreal, Canada Items Posted: Tue May 26, 2009 1:43 am    Post subject: Re: How many grains of sand are there in the world? gsf wrote: just looked at this was this guy guestimating grains of sand (6.63x10^22) or sudoku grids (6.67x10^21) I was asking : How many valid sudoku grids? JPS Back to top gsf Joined: 18 Aug 2005 Posts: 411 : Location: NJ USA Items Posted: Tue May 26, 2009 2:38 am    Post subject: Re: How many grains of sand are there in the world? ChPicard wrote: gsf wrote: just looked at this was this guy guestimating grains of sand (6.63x10^22) or sudoku grids (6.67x10^21) I was asking : How many valid sudoku grids? I know I was just commenting on the weird proximity of the actual number of grids and the guy's guess on something completely different Back to top angusj Site Admin Joined: 18 Jun 2005 Posts: 406 : Items Posted: Tue May 26, 2009 3:35 am    Post subject: I've changed the title of this thread to indicate it does have some (very tenuous IMHO) relevance to Sudoku. I've done this hopefully to discourage new threads with little relevance to Sudoku. (Admittedly, there's a gray line between what's relevant and what isn't.) Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         Sudoku Programmers Forum Index -> The mathematics of sudoku All times are GMT Page 1 of 1   Jump to: Select a forum Sudoku----------------Solving sudokuSetting sudokuProgramming sudokuThe mathematics of sudokuExotic sudoku Library----------------PuzzlesSoftwareSudoku elsewhere Not sudoku----------------Random thoughtsForum feedback  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum   Powered by phpBB © 2001, 2005 phpBB Group Igloo Theme Version 1.0 :: Created By: Andrew Charron