FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in          Games  Calendar Log in to check your private messages    To all sudoku gods, please help. Goto page Previous  1, 2          Sudoku Programmers Forum Index -> Setting sudoku View previous topic :: View next topic   Author Message Jean-Christophe Joined: 19 Mar 2006 Posts: 126 : Location: Belgium Items Posted: Tue Oct 10, 2006 2:59 pm    Post subject: Correct, I forgot to mention that the sub puzzles usually do not have unique solutions on their own. But one can open 5 instances of a solver program for each of the 5 sub puzzle of a samurai and solve them until no progress can be made. Then mirror the candidates in the overlapping areas and solve again. And repeat this process until the unique solution is found. This is actually easier to do than to explain ! _________________ Jean-Christophe "When you have eliminated the impossible, whatever remains, however improbable, must be the truth." Sherlock Holmes. Back to top m_b_metcalf Joined: 13 Mar 2006 Posts: 210 : Location: Berlin Items Posted: Tue Oct 10, 2006 6:52 pm    Post subject: Jean-Christophe wrote: Correct, I forgot to mention that the sub puzzles usually do not have unique solutions on their own. But one can open 5 instances of a solver program for each of the 5 sub puzzle of a samurai and solve them until no progress can be made. Then mirror the candidates in the overlapping areas and solve again. And repeat this process until the unique solution is found. This is actually easier to do than to explain ! But does it actually work (have you tried it)? That's the equivalent of what I do when solving a butterfly by hand, but at some point I require information across three sub-puzzles simultaneously: on a row that intersects 3 sub-puzzles and where a given value is on that row in the 2 leftmost boxes and in the two rightmost boxes, it is clear that that value must also be in the centre box of the seven on that row. That often solves a clue that your proposed method might not. There are other variations too. Regards, Mike Metcalf Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         Sudoku Programmers Forum Index -> Setting sudoku All times are GMT Goto page Previous  1, 2 Page 2 of 2   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