Microsoft Sudoku

For those new to these Microsoft Daily Challenge games, every day of the month the game presents you with three challenges that require you to complete a specific game-related task of varying difficulty, often not needing you to complete the full puzzle. The Achievement requires that you complete all three challenges for every day of the entire calendar month. You do not need to complete them on the day that they are posted, but when a new month begins, all previous progress toward this Achievement is lost. (You will still keep any badges you earned, however.)

For this game, you will be presented with a trio of challenges from either the Symbol or Irregular variety. Symbol puzzles work the same as regular Sudoku puzzles but use shapes instead of numbers. Irregular puzzles are a little different, in that the "houses" are not the standard 3x3 but take irregular shapes. You still need to abide by the one-number-per-row and one-number-per-column rules, but the one-number-per-house applies to an oddly-shaped space (which are thankfully coloured to make it easier to discern between them).

You have as many attempts as you need, and you can make mistakes along the way (though each puzzle has a limit as to how many mistakes you can make before you lose the challenge). The Achievement will pop once you complete the last challenge of the month and progress to the Collect Reward screen.

Not really a solution, so check the other solutions for what this achievement is about.

But.
If you need help, I created a Sudoku solver for this game (Symbols for now, Irregular coming soon).
http://dev.360surface.net/sudoku