As the forum's newbie I wonder what skills should I learn

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As the forum's newbie I wonder what skills should I learn

Postby dino_hsu_1019 » Tue Feb 21, 2012 3:28 pm

I know the basic eliminations, and I seem to be able to solve most level 5 puzzles, until I am stuck by this one after the 37th move is made:
030006100806205309000000086057000008083000061100000730348000690901403802005900413
according to "sudoku solver by Andrew Stuart" (http://www.sudokuwiki.org/sudoku.htm), it takes 7737 recursion to confirm it as having one unique solution and is thus valid. The problem is I don't know how to move on and I can't find a program to tell me which next move is available.
Since this is a valid puzzle, there should be some way to solve it, I wonder is it some skills that I don't know or is it too complicated for human, please shed some light on me, thanks in advance.
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Re: As the forum's newbie I wonder what skills should I lear

Postby ronk » Tue Feb 21, 2012 4:32 pm

This puzzle has a Sudoku Explainer difficulty rating of 8.5. That puts it in the grayish boundary between what is humanly solvable and what is not. IOW experienced solvers can likely work it, but newbie's don't really have a chance.
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Re: As the forum's newbie I wonder what skills should I lear

Postby Serg » Wed Feb 22, 2012 6:51 am

Hi, dino_hsu_1019!
Welcome to this forum!
dino_hsu_1019 wrote:I know the basic eliminations, and I seem to be able to solve most level 5 puzzles, until I am stuck by this one after the 37th move is made:
030006100806205309000000086057000008083000061100000730348000690901403802005900413
according to "sudoku solver by Andrew Stuart" (http://www.sudokuwiki.org/sudoku.htm), it takes 7737 recursion to confirm it as having one unique solution and is thus valid. The problem is I don't know how to move on and I can't find a program to tell me which next move is available.
Since this is a valid puzzle, there should be some way to solve it, I wonder is it some skills that I don't know or is it too complicated for human, please shed some light on me, thanks in advance.

I wonder why weren't you able to find solution of your puzzle step-by-step, because you know sudoku solver by Andrew Stuart. I went to http://www.sudokuwiki.org/sudoku.htm site, imported your sudoku (button "Import a Sudoku") and followed puzzle decision procedure step-by-step, clicking on the button "Take Step" repeatedly. Certainly the decision path is very complicated (at least to me, I am poor sudoku solver), but it does exist.

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