To play Sudoku, look at the grid made of 9 rows, 9 columns, and 9 smaller 3x3 boxes. The goal is to fill the empty spaces with numbers from 1 to 9.
Main rule
Each row, column, and 3x3 box must contain the numbers from 1 to 9, without repetition.
Step-by-step for beginners
- Look for rows, columns, or boxes with many numbers already filled in.
- See which numbers are still missing in that area.
- Eliminate impossible positions using the numbers already present in the same row, column, and box.
- Fill a cell only when you are logically sure.