Sudoku Fever

Thanks to JD for introducing me to Sudoku. Just too cheap to buy my own book though. So I went out to see if there are any good implementations of it for the PC which was crap followed by more crap. Recently though, I stumbled a website that implements the Sudoku puzzle game in JavaScript which by far had the best interface to play the Sudoku game and provides techniques to solve the puzzle. Don't bother with the easy one, its just a waste of your time since they are easy and quite mechanical. Go for the Extremely Hard ones that will get your thinker thinking. The hardest one for me to do in my head was this XY-Wing I get the numbers totally mixed up in my head. I was able to solve my first one today woo hoo! The site is not without its flaws though. Among them are:

• There is no direct link to go to the hardest level. (Actually found a way of doing this by viewing the source).
• If you are partially colour blind like me, you'd have trouble distinguishing errors from correct values when you click on Show Errors (though you shouldn't be using that anyway).
• On FireFox, pasting a "pencilled" number into a box makes it disappear when you go to the next box unless you do some edits to it.

Good luck if you try!