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# Weekly Challenge

Solve the challenge, share your solution and summit the ranks of our Community!

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## Challenge #200: Sudoku Solver

8 - Asteroid

Hi

Please find attach the beginner solution

7 - Meteor

My solution for the beginner challenge

Spoiler

10 - Fireball

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.

Spoiler
8 - Asteroid

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

Spoiler

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

5 - Atom

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

Alteryx

My beginner solution:

8 - Asteroid
Spoiler

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

8 - Asteroid

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

7 - Meteor

Beginner and Intermediate Solution attached below

Spoiler

17 - Castor

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

ResultThe Canvas
#SnakingMyWayThruChallenges