How to Play Sudoku: Official Sudoku Rules for Beginners
Sudoku is a logic-based puzzle of deduction and spatial reasoning. The goal is simple: fill every square on a 9×9 grid so that every row, column, and 3×3 box contains all digits from 1 to 9 without repetition.
3The 3 Fundamental Rules
Rows
Each of the 9 horizontal rows must contain all digits from 1 to 9. No number can appear twice in the same row.
Columns
Each of the 9 vertical columns must contain all digits from 1 to 9. No number can appear twice in the same column.
3×3 Boxes
The grid is divided into nine 3×3 square blocks. Each block must contain each digit from 1 to 9 exactly once.
Killer Sudoku Rules (Cages)
Killer Sudoku adheres to all 3 classic Sudoku rules, but introduces cages (groups of cells marked with dashed borders and a target sum number in the corner):
- 1The sum of all numbers inside a cage must equal the small number in the top-left corner of that cage.
- 2Numbers cannot repeat within the same cage, even if the cage spans across multiple rows or columns.
Sudoku Rules and Tricks: How Do You Play Sudoku for Beginners?
When asking how do you play Sudoku for beginners, remember that Sudoku is a game of pure deduction, not guesswork. Master these essential beginner tricks to solve any board faster:
1. The Elimination Method
Scan intersecting rows and columns for digits that appear frequently. Eliminate impossible squares in neighboring 3×3 boxes.
2. Look for "Almost Complete" Lines
If a row, column, or block already has 7 or 8 squares filled, counting the missing 1 or 2 digits guarantees an immediate free placement.
Ready to test your skills?
Start with Easy mode and utilize smart hints whenever you need guidance.