The objective of the game is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid (also called "boxes", "blocks", "regions", or "sub-squares") contains all of the digits from 1 to 9.
The puzzle setter provides a partially completed grid, which typically has a unique solution.
Completed puzzles are always a type of Latin square with an additional constraint on the contents of individual regions.
For example, the same single integer may not appear twice in the same 9x9 playing board row or column or in any of the nine 3x3 subregions of the 9x9 playing board.

Can you give me some tips for solving Sudoku puzzles?

Think logically about the puzzles, rather than guessing. This means you should only enter a number once you're sure about it. To get started, look for a number that appears a lot in the grid, and try to work out where else it should go. Also look for rows, columns or 3x3 boxes which are almost full, and see if you can place any of the numbers that are missing. Statistics about the avg time to solv the game. There's a Sudoku article at Wikipedia which contains many more solving tips - Wikipedia page about Sudoku

Created by Klaus S. Nielsen, Google Profile , other homepage .

Other online site to play www.websudoku.com, games.yahoo.com/sudoku.html

Think logically about the puzzles, rather than guessing. This means you should only enter a number once you're sure about it. To get started, look for a number that appears a lot in the grid, and try to work out where else it should go. Also look for rows, columns or 3x3 boxes which are almost full, and see if you can place any of the numbers that are missing. Statistics about the avg time to solv the game. There's a Sudoku article at Wikipedia which contains many more solving tips - Wikipedia page about Sudoku

Created by Klaus S. Nielsen, Google Profile , other homepage .

Other online site to play www.websudoku.com, games.yahoo.com/sudoku.html

Online Sudoku
GameApplication
Sudoku