Sudoku is a classic logic-based number puzzle that has gained worldwide popularity. The goal is simple: fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid contains all of the digits from 1 to 9.
Every horizontal row must include each number from 1 to 9 exactly once, with no repetitions.
Every vertical column must include each number from 1 to 9 exactly once, with no duplicates.
Each of the nine 3×3 subgrids must contain all numbers from 1 to 9 without repetition.
Sudoku is purely about logic and pattern recognition—no arithmetic or mathematical skills needed!
Look for rows, columns, or boxes that already have many numbers filled in. These will give you the most clues about which numbers are missing.
Scan rows and columns to eliminate possibilities. If a number already appears in a row and column, it can't appear in the intersecting cell.
Sometimes a cell will have only one possible number that can fit based on the numbers already in its row, column, and box.