I have solved many Sudoku games on my Android mobile phone's Sudoku apps, but never had I tried to solve one on paper.
My average time to solve a "hard" Sudoku game is around 13 minutes while the fastest was around 9 minutes. But these went to toss when I tried to solve a Sudoku game on paper.
The below is the photo of my attempt:
This took me greater than an hour to complete.
Maybe I need to learn a different strategy.
