FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in          Games  Calendar Log in to check your private messages    An simple way to genarate Sudoku with a pattern          Sudoku Programmers Forum Index -> Setting sudoku View previous topic :: View next topic   Author Message Thunderwave Joined: 03 Jun 2007 Posts: 6 : Items Posted: Tue Jun 05, 2007 12:34 am    Post subject: An simple way to genarate Sudoku with a pattern So, this may or may not have been discussed but I browsed a lot and have not found anything too similar. I could be wrong. I just throw in a bunch of numbers and using my program, I highlight errors and fix them til the puzzle is complete, I than remove numbers to try to leave a pattern. When I find it leads to an unsolvable puzzle I go back and find a new number to delete. I keep deleting until it creates a pattern and has only one solution. So, here's one I came up with. Code: +-------+-------+-------+ | 4 . . | 1 . 5 | . . 3 | | . 9 . | . 7 . | . 4 . | | . . 2 | . . . | 1 . . | +-------+-------+-------+ | 1 . . | 8 . 9 | . . 4 | | . 5 . | . . . | . 7 . | | 3 . . | 7 . 4 | . . 1 | +-------+-------+-------+ | . . . | 2 . 3 | . . . | | . 1 . | . 6 . | . 3 . | | 2 . . | 5 . 7 | . . 8 | +-------+-------+-------+ Back to top wapati Joined: 12 Jun 2007 Posts: 622 : Location: Canada Items Posted: Wed Aug 01, 2007 4:37 pm    Post subject: You didn't ask any questions so it is hard to reply. Your puzzle is pretty difficult but has no symmetry. Here is a little easier symmetric version. Code: 4..1.5..3 .9..7..4. ..2...1.. 1..8.9..2 ....1.... 3..7.4..1 ..8...2.. .1..6..3. 2..5.7..8 There are two ways to create sudoku puzzles and yours is one. You take a complete grid and remove numbers until it cannot be solved, then put the last one back in. (Sometimes last two, for symmetry.) The other way is to take a blank grid and add clues until the puzzle can be solved. Back to top Thunderwave Joined: 03 Jun 2007 Posts: 6 : Items Posted: Wed Aug 01, 2007 5:45 pm    Post subject: So my question is Why does there have to be full symmetry? I think your version of that puzzle is good and fancy looking, just wandering if there are puzzles out there that maybe have picturesque qualities. Like animals, figures, etc. Code: +-------+-------+-------+ | . 4 . | . . . | . 5 . | | 9 . . | 2 . 4 | . . 8 | | . . 6 | . . . | 4 . . | +-------+-------+-------+ | . 7 . | 4 . 9 | . 1 . | | 1 . 4 | . . . | 9 . 6 | | . 6 . | 3 . 1 | . 7 . | +-------+-------+-------+ | . . 7 | 1 . 2 | 6 . . | | . . . | 8 . 6 | . . . | | 6 . 8 | 9 4 7 | 1 . 3 | +-------+-------+-------+ Back to top gsf Joined: 18 Aug 2005 Posts: 411 : Location: NJ USA Items Posted: Wed Aug 01, 2007 6:01 pm    Post subject: wapati wrote: Your puzzle is pretty difficult but has no symmetry. it has vertical symmetry Back to top north55 Joined: 02 Dec 2006 Posts: 43 : Items Posted: Wed Aug 01, 2007 10:35 pm    Post subject: gsf wrote: wapati wrote: Your puzzle is pretty difficult but has no symmetry. it has vertical symmetry Oops, my bad... Thanks gsf, sorry Thunderwave, you do have symmetry. There are many forms of symmetry and while 180 degree may be most popular all symmetry is respected. Back to top Thunderwave Joined: 03 Jun 2007 Posts: 6 : Items Posted: Wed Aug 01, 2007 10:51 pm    Post subject: No problem north55/?Wapati? That leaves a lot more room for creativity. Back to top wapati Joined: 12 Jun 2007 Posts: 622 : Location: Canada Items Posted: Thu Aug 02, 2007 1:31 am    Post subject: Thunderwave wrote: No problem north55/?Wapati? LOL. My brother used my computer and left the logon. He has been at this site much longer than I, although he posts little. I answered not knowing that it was under his name. This is me, wapati. Back to top m_b_metcalf Joined: 13 Mar 2006 Posts: 210 : Location: Berlin Items Posted: Thu Aug 02, 2007 7:52 am    Post subject: Thunderwave wrote: ..., just wandering if there are puzzles out there that maybe have picturesque qualities. Like animals, figures, etc. Very many; see, for instance, http://www.sudoku.com/boards/viewtopic.php?t=4147. Regars, 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 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