Game is life..
For hundreds of millions of people, the morning routine includes getting a
hot beverage and a Sudoku puzzle. Billions of people in every country of the
world have enjoyed Sudokus, and some of us are addicts to this puzzle type.
In fact, we have a whole section on why we think Sudokus are addictive, and
how the puzzles in this book were chosen using one criterion of addictiveness.
The rules governing Sudoku puzzles are stated here for the benefit of beginners
who are encountering this puzzle type for the first time. First, an overview of
commonly used terms.