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How to reinstate a deleted candidate

 
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pch

Joined: 28 Sep 2005
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PostPosted: Wed Sep 28, 2005 4:24 pm    Post subject: How to reinstate a deleted candidate Reply with quote

I find the Simple Sudoku program very useful, particularly when solving Killer Su Doku puzzles. However, I sometime inadvertently remove a possible candidate from a cell and discover later that I need to re-instate it. Is it possible to do so without going through multiple 'Un-Do' steps and, thereby, losing the progress to date?
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angusj
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Joined: 18 Jun 2005
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PostPosted: Wed Sep 28, 2005 10:32 pm    Post subject: Re: How to reinstate a deleted candidate Reply with quote

pch wrote:
I find the Simple Sudoku program very useful, particularly when solving Killer Su Doku puzzles. However, I sometime inadvertently remove a possible candidate from a cell and discover later that I need to re-instate it. Is it possible to do so without going through multiple 'Un-Do' steps and, thereby, losing the progress to date?

No, it's not possible except by using undo. (The danger in reinstating a candidate without undoing is that subsequent actions may also have been premised on that exclusion mistake.)
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