Argyle Sudoku 2013 - 1

I have been out of town since Monday to attend the wedding of my Brother-in-law and hence not been able to update the blog. I could skip the blog for a few days but I cannot sideline the Daily League. So This is a puzzle for the daily league.

Today's Puzzle is an argyle sudoku.

Rules of classic sudoku apply. Additionally, digits cannot repeat on any of the marked diagonals.