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| stonesbg
| Joined: 11 Oct 2005 | Posts: 3 | : | | Items |
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Posted: Tue Oct 11, 2005 7:48 pm Post subject: Sudoku only one solution and can only be solved by logic |
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Hey Everyone don't know if this is the right place to put this or not but i am looking for information on sudoku that can only be solved by logic and not brute force and also sudoku that only have one solution. Hope that you can all help
Stones |
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| Lummox JR
| Joined: 07 Sep 2005 | Posts: 202 | : | | Items |
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Posted: Tue Oct 11, 2005 10:16 pm Post subject: |
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Brute force actually is logic. It's trial and error, which applied logically is different from a guess. (It says "This placement is invalid because ____" or "All choices for ____ imply ____.") For most people it's a little too close to guessing for comfort, but it's still logic.
And all valid sudoku puzzles have only one solution. A puzzle with more than one solution is broken; logic can't solve them; it can only eliminate or place candidates to the point where you must make a guess.
So if you're looking for puzzles that can be solved with logic alone, and also puzzles that have just one solution, they're one in the same. All others are invalid. |
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