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 Post subject: MeanDoku NC X 15
PostPosted: Tue Aug 29, 2017 9:04 pm 
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Grand Master
Grand Master

Joined: Wed Apr 30, 2008 9:45 pm
Posts: 526
MeanDoku NC X 15

The following colour clues apply:
Green: the average of the two adjacent cells is below five
Blue: the average of the two adjacent cells is five
Red: the average of the two adjacent cells is above five

NC: horizontally and vertically adjacent cells are non-consecutive.

X: diagonals do not repeat.

On how I create them: I think up some sort of skeleton pattern (say a lot of blues). I then check that it has solutions (if not I remove some clues until it does). I then use JSudoku to find all solutions (Alt-recursively solve). I then chose more clues fitting in with the original idea to make it unique (but normally not solvable). I solve it as far as I can then add more clues a few at a time until I can solve it completely. I use JSudoku at this stage but care must be taken with the combination work as the program will find relationships a human cannot see. I finish by solving it myself at least once.

This last bit is difficult as with this approach you often find that adding the last clue to make it solvable simplifies earlier solving and makes the puzzle too easy.

Reasonably hard


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 Post subject: Re: MeanDoku NC X 15
PostPosted: Fri Sep 15, 2017 9:29 pm 
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Addict
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Joined: Mon Apr 21, 2008 11:35 pm
Posts: 23
AWESOME! Thanks, HATMAN, can't wait to give this a go! And, thanks for the creation insights - sounds as complicated as I envisioned it!


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