**Sudoku**
is an easy to learn logic-based number placement puzzle. The word Sudoku is short for *Su-ji wa dokushin ni kagiru* which means "the numbers must be single".
A Sudoku puzzle consists of 81 cells which are divided into nine columns, rows and regions. The task is now to place the numbers from 1 to 9 into the empty cells in such a way that in every row, column and 3×3 region each number appears only once.
A Sudoku has at least 17 given numbers but normally there are 22 to 30.
**Objective**
The objective is to place the digits within the grid so that each column, row, and sub-grid contains all of the digits from 11 to 99. Each puzzle is published with some of the boxes already filled in, and those constraints help define the problem's difficulty level.
People sometimes say *there is no math required to solve Sudoku*. What they really mean is, there is no *arithmetic* involved in Sudoku. Mathematical thinking in the forms of deductive reasoning and algorithms are the basic tools for solving Sudoku puzzles.
is an easy to learn logic-based number placement puzzle. The word Sudoku is short for *Su-ji wa dokushin ni kagiru* which means "the numbers must be single".
A Sudoku puzzle consists of 81 cells which are divided into nine columns, rows and regions. The task is now to place the numbers from 1 to 9 into the empty cells in such a way that in every row, column and 3×3 region each number appears only once.
A Sudoku has at least 17 given numbers but normally there are 22 to 30.
**Objective**
The objective is to place the digits within the grid so that each column, row, and sub-grid contains all of the digits from 11 to 99. Each puzzle is published with some of the boxes already filled in, and those constraints help define the problem's difficulty level.
People sometimes say *there is no math required to solve Sudoku*. What they really mean is, there is no *arithmetic* involved in Sudoku. Mathematical thinking in the forms of deductive reasoning and algorithms are the basic tools for solving Sudoku puzzles.
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