AlsaediNexius Games · Published October 9, 2026
Sudoku for Beginners: Six Techniques That Work
Sudoku is a logic puzzle, not a maths puzzle. You never need to add numbers. You only need to place the digits 1 to 9 so that each appears once in every row, every column and every 3 by 3 box. If you are new to the game, these six techniques will take you a long way.
1. Scan for a missing digit
Pick a digit, say 5, and find where it already appears. Each 5 rules out its whole row, column and box. Look at a box that has no 5 yet. Often only one cell is left where a 5 can go. Repeat for each digit.
2. Count what a row, column or box needs
If a row has eight digits filled in, the missing digit is obvious. Rows, columns and boxes that are nearly full are the best places to start.
3. Find the only candidate in a cell
Look at one empty cell and list which digits could go there by checking its row, column and box. If only one digit is possible, write it in. This is called a naked single.
4. Use pencil notes
When you cannot place a digit directly, write small candidate numbers in the cell. Do this only for cells with two or three possibilities, or the grid gets messy. Notes let you spot patterns that are invisible otherwise.
5. Look for pairs
If two cells in the same row both have only the candidates 3 and 7, then 3 and 7 must go in those two cells. You can remove 3 and 7 from the other cells in that row. This single idea unlocks many medium puzzles.
6. Take a break and switch areas
Staring at one spot rarely helps. Move to a different box. New digits placed elsewhere often make the stuck area easy when you come back.
Common mistakes
The biggest mistake is guessing. A guess that turns out wrong can corrupt many cells before you notice. Every puzzle in Sudoku Pro has exactly one solution that can be found by logic, so when you feel stuck, there is always a logical step you have not spotted yet. Check your notes for errors before assuming the puzzle is wrong.
Getting faster
Speed comes from habit. Always scan the same way, for example digit by digit from 1 to 9. Set Easy as your starting point, move up when you finish without hints, and use hints only to learn what you missed.
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