Your First Sudoku Puzzle: A No-Pressure Walkthrough
Sudoku a Day Blog
Staring at a half-empty 9x9 grid for the first time can feel overwhelming. Where do you even start? The good news: Sudoku is simpler than it looks, and you do not need any math skills to solve it.
This walkthrough takes you through your very first puzzle, one step at a time.
The three rules (that is all there are)
Every Sudoku puzzle follows exactly three rules:
1. Each row must contain the digits 1 through 9, with no repeats. 2. Each column must contain the digits 1 through 9, with no repeats. 3. Each 3x3 box must contain the digits 1 through 9, with no repeats.
That is it. No addition, no special formulas. Just place every number so it appears exactly once in its row, column, and box. For a full breakdown, visit our Sudoku rules page.
Step 1: look for almost-complete rows
Start by scanning the grid for any row, column, or box that already has most of its numbers filled in. If a row has eight numbers and one empty cell, the missing number is obvious. Fill it in.
This is the easiest type of move, and most easy puzzles give you several of these right away.
Step 2: scan one number at a time
Pick a number, say 5, and look at where it already appears on the grid. In any row, column, or box that already has a 5, you know no other cell in that group can hold a 5. Use that information to find cells where 5 is the only option left.
This technique is called scanning, and it is the foundation of all Sudoku solving. Learn more about it in our beginner guide.
Step 3: use elimination
When scanning does not give you an obvious answer, try elimination. Look at an empty cell and ask: which numbers are already in this cell's row, column, and box? Cross those out mentally. If only one number remains, that is your answer.
This is the naked singles technique, and it works on nearly every cell in easy puzzles.
Step 4: keep going
After each placement, check whether it unlocks new information nearby. One solved cell often reveals the next. Easy puzzles are designed to create this chain reaction, so patient scanning wins.
If you get stuck, do not guess. Move to a different part of the grid and come back. There is always a logical next step.
What if I make a mistake?
Everyone makes mistakes early on. If the grid starts to feel impossible, the most likely cause is an incorrect placement somewhere earlier. Go back and double-check your recent moves.
Using pencil (on paper) or notes mode (in an app) helps prevent errors. You can write small candidate numbers in cells and erase them as you narrow down options.
You finished your first puzzle
Congratulations. It might have taken 20 minutes or an hour, but you solved it with pure logic. No shortcuts, no luck. That feeling of completion is real, and it gets better with practice.
What comes next?
Once you have solved a few easy puzzles comfortably, you will start to notice patterns. Certain number placements will feel automatic. That is your scanning instinct developing. It is the same instinct that makes experienced solvers look fast, and it starts building from your very first grid.
Do not rush to harder levels. Enjoy easy for a while. Build accuracy and confidence first, then let curiosity pull you toward medium when easy starts feeling too quick.
Ready for your next one? Try today's daily puzzle or download a printable easy pack to keep practicing.
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