This Sudoku first time I saw in World Sudoku Championship 2009 (Puzzle L3). This puzzle I created for the Indian Team practice.
Instructions:
Fill in the grid so that every row, every column and every 3x3 box contains all digits 1 through 9. Every diagonal contains only 3 different numbers (e.g. 1,4,6).
Update your timing for this puzzle in the "Comments" section below this post. Also give your feedback regarding this puzzle there, it will help me to improve the puzzles posted on this site.
Check out for "Puzzle Gadgets" created by me.