Sudoku Rules
Sudoku is a Japanese puzzle where you need to write numbers according to a specific algorithm (so they don't repeat vertically, horizontally or diagonally). In simple Sudoku, you need to fill in the missing numbers in 3x3 cells. Complex Sudoku can have more than three rows and three columns, up to 6x6, 9x9 or more cells.
In the classic Sudoku version, you have nine three-by-three blocks where you need to enter numbers from one to nine. The basic rules are as follows:
- · Vertical numbers cannot be repeated.
- · Horizontal numbers cannot be repeated.
- · Numbers can only appear once in a 3x3 square.
The rules of classic Sudoku mean that some numbers are already fixed at the beginning. This makes it easier to analyze the grid and find the missing values. The number of empty cells and numbers depends on how challenging you want the puzzle to be. The higher the challenge level, the fewer cells are filled (so you need to use specific techniques to quickly and accurately fill the entire grid).
Once you have entered all the numbers into the field, you are done. You can continue to the next one.