• The program has turned into a web application
• Using Tornado as the server framework, Twitter bootstrap is included as well

This change is aim for better data input method, thus no change on the sudoku solver algorithm

• Able to solve hard sudoku problems
• The attached input is a random example of hard sudoku game
• Added more complex algorithm to reduce the possibility table

Gone far from the most optimal way.. can't garentee the correctness either, did not add validation tests.

• Limited to file input
• Able to solve simple sudoku problems
• The attached input is said to be the HARDEST sudoku ( not sure if it's true, but I wasn't able to solve it with pen and paper yet.. )
• More complex algorithms to find answers need to be added ( concluded from my own experience of playing sudoku for years.. )

Exploring Best and most Optimal way to solve sudoku.