FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in          Games  Calendar Log in to check your private messages    Another Finned XWing question          Sudoku Programmers Forum Index -> Solving sudoku View previous topic :: View next topic   Author Message evert Joined: 30 Aug 2005 Posts: 68 : Location: Amsterdam Items Posted: Mon Mar 27, 2006 9:12 pm    Post subject: Another Finned XWing question See also http://www.setbb.com/sudoku/viewtopic.php?t=750. Ruud wrote: A finned X-Wing is almost an X-Wing. The only difference is that one of the 4 cells has some extra candidates that share a box and a row or column (depending on whether the almost X-Wing lies in the rows or in the columns. This is the picture: Code: . . .|. . .|. . . . . .|. . .|. . . . . X|. x .|. . . -----+-----+----- . . *|. . .|. . . . . *|. . .|. . . F F x|. X .|. . . -----+-----+----- . . .|. . .|. . . . . .|. . .|. . . . . .|. . .|. . . The extra candidates (marked with F) is what people call the 'fin'. Either of these 2 candidates can be available, or both. I Understand that the fact that the *s are in the same box as the fin is crucial. Is this correct? I.e. In Code: . . .|. . .|. . . . . .|. . .|. . . . . X|. x .|. . . -----+-----+----- . . *|. . .|. . . . . .|. . .|. . . F F x|. X .|. . . -----+-----+----- . . .|. . .|. . . . . *|. . .|. . . . . .|. . .|. . . The *s can't be eliminated? Back to top Ruud Site Admin Joined: 17 Sep 2005 Posts: 708 : Location: Netherlands Items Posted: Mon Mar 27, 2006 9:17 pm    Post subject: Re: Another Finned XWing question evert wrote: I Understand that the fact that the *s are in the same box as the fin is crucial. Is this correct? I.e. In Code: . . .|. . .|. . . . . .|. . .|. . . . . X|. x .|. . . -----+-----+----- . . *|. . .|. . . . . .|. . .|. . . F F x|. X .|. . . -----+-----+----- . . .|. . .|. . . . . *|. . .|. . . . . .|. . .|. . . The *s can't be eliminated? You marked 2 cells with * in your example. The top one shares a box with the fin, so it will be eliminated. The bottom one does not. Ruud _________________ Meet me at sudocue.net Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         Sudoku Programmers Forum Index -> Solving 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