Uniqueness

Advanced methods and approaches for solving Sudoku puzzles

Postby Finlip » Fri Sep 08, 2006 8:16 am

There's been a lot going on in this thread. The original question that I had has been answered. Thank you everybody. If I find a solution using uniquenes conditions, I won't prove that I've reached a unique solution. I may have missed a few solutions, an even number of them.
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Postby tarek » Fri Sep 08, 2006 9:28 am

It all falls down to the fact that this technique should be applied when a single solution is assured...... (Chack validity from an online solver, or Trust the reliable source)

The logic behind its application depends on the fact that there is one solution to the puzzle.

It has been taken for granted because all of the puzzles in newspapers nowadays are of that type [this made the fine print of "Apply when there is only one solution" unnecessary]

Unfortunately, when you stumble into a Pseudopuzzle or any puzzle that does not have one solution, then it should not be applied, the outcome is irrelevant and illogical as much as it is variable........

tarek
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