How to play Mini Sudoku

The goal and the first move

Fill a 4 by 4 grid so every row, column and 2 by 2 box contains 1 through 4. Open the first challenge if this is your first round. Before pressing Start, read the goal in the side panel and locate the controls. There is no entry fee, score purchase or account requirement. You can restart a round whenever you need another attempt.

Select an empty cell, then choose a number below the board. On a narrow screen, the controls appear below the board. Keep the page still while interacting with the game, and finish any typing before using keyboard shortcuts. This avoids sending an intended game move to a text field.

A strategy to try

Start with a row or box that is missing only one number.

A number may fit the row but conflict with its box. Check all three constraints before committing.

Try one change at a time. For example, play a round while prioritising the tip above, then compare how the board develops with your previous attempt. A single useful observation is more valuable than a rushed restart. The result belongs to this challenge; it is not a comparison with other players.

Choose your challenge

The ten entries below share the same basic rules. Their settings determine the goal, the available time, the board or the computer behaviour. Easy, Medium and Hard are labels within this game family; they are not standardised ratings across every game on the site.

1. Royal Numberbook — empty cells: 5
2. Reef Number Tiles — empty cells: 6
3. Library Ledger — empty cells: 7
4. Robot Numberboard — empty cells: 8
5. Snowflake Squares — empty cells: 9
6. Orchard Planner — empty cells: 10
7. Starlight Sudoku — empty cells: 11
8. Studio Number Study — empty cells: 12
9. Teatime Grid — empty cells: 13
10. Lagoon Logic — empty cells: 14

When a round does not go to plan

Check the controls before changing your strategy. A blocked move can be part of the game rules, such as moving into a wall, choosing a filled cell or using a disabled letter. Read the status line above the board for the current prompt. It reports progress and explains the result when the round ends.

Use Restart to return to a fresh board. Where the game uses shuffled layouts, the next round can have a different arrangement while keeping the same challenge settings. A harder label means a changed set of parameters, not a guarantee that every random layout will take longer.

Short breaks and local records

Finish a round, put the game down and return when you want another short break. PLAYDAY saves favourites, recent game IDs and small result records in browser storage. It does not provide cloud saves or a public leaderboard. Clearing browser data, using a different browser or private browsing may remove or separate these records.

The games do not make claims about improving intelligence, treating a condition or measuring professional ability. Their purpose is ordinary recreation. You can read more about the stored information on the privacy page.