Sudoku
Sudoku is the world's most popular number-placement puzzle. The objective is to fill a 9ร9 grid so that each column, each row, and each of the nine 3ร3 sub-boxes contains all digits from 1 to 9. The puzzle provides a partially completed grid, and you must use logic to determine the correct numbers for each empty cell. Sudoku requires no math โ just logic and patience. It's an excellent brain exercise that improves concentration, logical thinking, and pattern recognition. Our version offers four difficulty levels from Easy to Expert, with a built-in hint system for when you get stuck.
How to Play Sudoku
Click on an empty cell to select it, then type a number from 1 to 9. Each number can only appear once in each row, column, and 3ร3 box. Use the pencil mode to add notes (candidate numbers) to cells. The puzzle is complete when every cell is filled correctly. Use logic to eliminate possibilities and find the correct numbers.
Sudoku Tips & Tricks
Start with rows, columns, or boxes that have the most numbers filled in. Use elimination โ if a number already appears in a row, column, or box, it can't go in other cells of that group. Look for 'naked singles' โ cells where only one number is possible. Use pencil marks to track candidates. Practice easier puzzles before attempting Expert difficulty.