Challenge #200: Sudoku Solver

[Himanshu_1984]

Hi

Please find attach the beginner solution

[greko]

My solution for the beginner challenge

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[Ben_H]

I just tried to post but I seem to have lost it -

Anyway here's my solution to the advanced section. I didn't include the other bits as they are needed to do the advanced.

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[KevinTang]

Advanced done, write a little iterative macro to fill the blanks. 

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it's hard to find the general solving rules for all the sudoku, but it's definitely an interesting topic, will dig deeper later

[tguler1]

Solution attached (works for all levels). Went for the strategy I use to solve them though Alteryx does it a bit faster.

[DavidThorpe]

My beginner solution:

[KeithZ]

Spoiler

I'll have to come back around for the intermediate and advanced.

[papalow]

I solved the beginner level.  Will need to spend more time on the intermediate level puzzle on another day.

[MOHAMMEDAFZAL]

Beginner and Intermediate Solution attached below

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[SeanAdams]

To understand recursion...

First you must understand recursion.

Went with a python solution as that seemed to be the most direct approach to crack the advanced part of this challenge

Spoiler

The solution can be broken down into:
- Is the current board solved - if yes then stop
- if not, then find the first open position:
- For every valid move in that positoin:
        - Try the move - and then try to solve the resulting board (just feed it into this same process)
        - If this works then you have a solution, if it doesn't then the number that you tried didn't belong there - try a different number







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