SUDOKU SAMA · iPHONE & iPAD
Daily 6×6 Sudoku.
One key placement.
Find where a number belongs in a given row—not every empty cell. Take your time, with no timer. After you answer, replay the numbered steps and unlock a short science reading.
Today’s puzzle is free. No ads. No Sudoku Sama account required.
One answer. Then a little more.
1. Make one key placement
Each daily puzzle asks where a particular number belongs in a given row. Study the clues in the 6×6 grid, then choose its position. Complete the challenge with that answer, not by filling every empty cell.
2. Replay the steps
After you answer, tap HOW? to replay the numbered steps and watch the grid fill in, one step at a time.
3. Read something new
Completing today’s puzzle unlocks a short science reading. Follow its source link to explore further.
Science readings are AI-generated editorial text based on linked NASA reference materials. NASA has not reviewed or endorsed these readings or this app.
Start with the rules. Follow the clues.
New to a smaller Sudoku grid? These guides are free to read here. Playing the daily puzzle takes place in the app, not in your browser.
How to play Sudoku Sama
Read the question, choose a cell, and revisit your answer.
Read the app guide →The rules of 6×6 Sudoku
Six numbers. Rows, columns, and 2×3 boxes.
Learn the rules →One placement, worked through
An original teaching grid with a step-by-step elimination example.
Follow the example →Mini Sudoku vs classic 9×9
When a 6×6 grid is enough, and when a full classic puzzle still fits.
Compare the formats →What one key placement means
One cell completes the day. The reasoning can take several steps.
Read the definition →A daily brain teaser with no timer
What changes when a daily puzzle does not score you on speed.
See the calm daily →Hidden singles on a 6×6
Where a number has to go when one cell is left in a row, column, or box.
Learn the scan →Why 6×6 boxes are 2×3
Six digits need six cells, so the boxes are rectangles.
See the box shape →A daily streak without a clock
What a completion streak counts, and how it follows you between devices.
Read about the streak →A short science reading after the puzzle
What unlocks when you finish, and how to read the source.
Read about the reading →Learn from the step replay
What HOW? shows after you answer, and how to review it.
See the replay →Your progress, your pace
Track your results and streak, and revisit completed puzzles. Progress is saved on your device. Optional iCloud Sync keeps Daily completion dates and grades and Archive collection dates and grades in sync across your iPhone and iPad.
Puzzle boards, readings, answers, display names, and preferences do not sync. Restored results can be reviewed when the relevant puzzle content is available; iCloud does not restore the original puzzle snapshot. Read more about saved progress and sync.
Before you download
Which devices can play?
Sudoku Sama is an English-language app for iPhone and iPad, requiring iOS or iPadOS 26 or later. Check the App Store listing for availability in your region.
What is free? What does Premium add?
Today’s puzzle is free. Premium unlocks past puzzles in the Archive, a collection built from completed puzzles, and a member profile card to save or share. Monthly and annual subscriptions are available. Prices and availability vary by region; see the app’s subscription screen before purchasing.
Is there a timer or a full grid to finish?
No timer. You answer a specified placement question instead of filling the entire grid. One answer can still take several deductions. There is no time limit to beat.
Do I need an account?
No Sudoku Sama account is required. Subscriptions use your Apple Account, and optional sync uses your iCloud account. The privacy policy explains content downloads, optional usage analytics, and purchase reporting.
Can I play on this website?
No. This website introduces the app and provides reading guides. Download Sudoku Sama from the App Store to play.
A little logic. A little wonder.
One daily question. Time to think.
Download on the App StoreQuestions? Contact Sudoku Sama support.