Sudoku is a recently popular number puzzle game from Japan. You need to fill the grid with numbers in such a way that all rows, columns and 3×3 squares have all digits (1-9). These puzzles are printed daily on many leading newspapers.

The concept of Sudoku is simple. The puzzle consists of a 9×9 square grid that is divided into nine 3×3 squares, resulting in nine rows and nine columns, for a total of 81 small squares. The unsolved Sudoku puzzle supplies only a few numbers in random squares.

In its most basic form, Sudoku comes in the traditional 9×9 square grid with various difficulty levels. The difficulty rating for solving the puzzle is not based on the number of squares with numbers supplied, but rather on their placement on the grid. These supplied numbers are called givens. ³

Free download from Shareware Connection - Traditional Sudoku is a logic-based placement puzzle. Te object is to fill the grid so that every column, every row and every 3×3 box contains the digits 1 to 9. AvexLab Sudoku presents Sudoku game with very simple and user-friendly interface.

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“Sudoku has become the passion of many people the world over,” says computer scientist J. F. Crook of Winthrop University in Rock Hill, S.C., in the current Notices of the American Mathematical Society. teresting fact about Sudoku is that it is a trivial puzzle to solve.

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Play unlimited sudoku puzzles on your pc with just one sudoku download. Desktop Sudoku is a fun and easy to use puzzle game for beginners and expert sudoku players alike.

The puzzles are generally grids of 81 squares, nine across and nine down. Some boxes have a number filled in; the rest are blank. Players must fill in the blank squares with numbers between 1 and 9 without repeating any numbers in a row, column or the nine interior 3-by-3 boxes of the puzzle.

In 1986 it was published in a Japanese puzzle magazine under the name “Sudoku”. Subsequently, the game was reimported into America and Europe and the Japanese name stuck, doubtless giving the puzzle an air of oriental mystery.

This is looking for set of numbers or a singleton set in order to finalise the number for the cell. You need to repeat this for cells, rows and columns. Arriving at this preemptive set and hidden preemptive set is the key in finding solution for a sudoku puzzle.

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There are chances, that you may not gracefully finish the puzzle without making a random choice. So make the necessary random choice to continue the game and solve it. Crook explained the need for making random choice by demonstrating that there are chances for a puzzle to have several possible solution.