FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in          Games  Calendar Log in to check your private messages    Killer Swordfish example Goto page Previous  1, 2, 3, 4          Sudoku Programmers Forum Index -> Solving sudoku View previous topic :: View next topic   Author Message Nick70 Joined: 08 Jun 2005 Posts: 160 : Items Posted: Thu Aug 04, 2005 10:22 pm    Post subject: AMcK wrote: Thanks to you both for assistance. I see that my "simple logic" pre-solver had missed the N=2 pair in column 6 and I was colouring from {3,6}=348 rather than your 48. ??? The 3 in r3c6 is removed by the swordfish. That was the whole point of the puzzle! AMcK wrote: but I'm still looking for a logically solvable puzzles that supercolouring can't solve. Actually you were looking for a swordfish that supercoloring couldn't solve--which is the puzzle above. If you want logically solvable puzzles that cannot be solved by supercoloring, I can give you plenty. Here are two: Code: ..8.2.7.1 .356..... 9........ .....5... ..2.1.8.. ...4..... ........4 .....752. 7.1.8.3.. ..4.8.6.1 .356..... 7........ .....5... ..6.1.8.. ...4..... ........7 .....752. 5.8.6.3.. The coloring algorithm can however be extended to deal with them. 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 Goto page Previous  1, 2, 3, 4 Page 4 of 4   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