Rules Of Sudoku Puzzles (known also as SUDOKO, SU-DO-KU)
The puzzle is most frequently a 9×9 grid made up of 3×3 subgrids (called "regions"). Some cells already contain numbers, known as "givens". The goal is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 through 9 exactly once. Each number in the solution therefore occurs only once in each of three "directions", hence the "single numbers" implied by the puzzle's name.
See also:
Sudoku In Wikipedia
Daily Sudoku Puzzles Online @2005-2016 by friko.net
Commands:
Undo | Undo one move |
Redo | Redo one move |
Restart | Restarts current game |
Print | Prints given sudoko puzzle |
Hint | Gives a hint for choosen field (you should place the cursor in the field before) |
Solve | Solves given sudoku |
Random | Random game |
Custom | Clears the board, so you can type your own puzzle |