dailysudoku.com Forum Index dailysudoku.com
Discussion of Daily Sudoku puzzles
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Is a certain puzzle valid ?

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> General discussion
View previous topic :: View next topic  
Author Message
nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria

PostPosted: Wed Jul 03, 2013 8:11 am    Post subject: Is a certain puzzle valid ? Reply with quote

In this thread in the "Other Puzzles" section, Pat pointed out (quite correctly, of course) that my "Helmut's Sudoku Helper" did not verify the uniqueness / validity of an imported puzzle.

I remember back when I wrote HSH I intended to put this on my "to do" list for later, but then "later" never came ... Embarassed

So now I finally got around to doing what should have been there in the first place, I've upgraded HSH to find the number of solutions and refuse to import unless the puzzle has exactly one solution.

The Sudoku Helper can be found here:http://www.saueregger.at/sudoku/HSH/HSH.htm

To verify a puzzle, just paste a puzzle into the box on the right hand side and hit "Do it". If it imports without error message, the puzzzle is valid.

Helmut

----

Notes:
- the program will stop looking for more solutions once 100+ solutions have already been found.
- Most often, the reason for "too many solutions" is an incorrect Sudoku type. The X-Sudokus, for example, have two additional implicit constraints (diagonals) that can reduce the number of solutions from several thousand to only one.
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> General discussion All times are GMT
Page 1 of 1

 
Jump to:  
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