Sudoku grid n°1233439

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Grid n°1233439 | Difficulty : beginner

Congratulations

Well done ! You have solved this puzzle successfully!

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Miscellaneous

Settings

How to play ?

Reset puzzle

New puzzle

Calculate pencilmarks

Remove pencilmarks

Settings

Input mode

Cell first
First select a cell. Then select the digit to insert in it.

Digit first
First select a digit. Then select the cell in which you want to insert it.

Mixed
Click on a cell to select it and play like Cell first mode. Click on it again to unselect it and deactivate Cell first mode.
Long press a digit (or Ctrl + digit with keyboard) to lock it and play like Digit first mode. Click on it again to unlock it and deactivate Digit first mode.

Automatic error checking

Disabled
No errors are pointed out.

Rule violations
You are notified when you enter a digit twice in the same row, column or region.

Incorrect values
You are notified when you enter a digit in the wrong cell.

Highlight restricted cells
When a cell is selected, it highlights the cells that share a house with it.
When a digit is locked, it highlights the cells where that number cannot be put in.

Auto remove candidates
When you enter a digit in a cell, it automatically removes that digit as candidate from cells in the same row, column, or region.

Automatic error checking

Disabled
No errors are pointed out.

Rule violations
You are notified when you enter a digit twice in the same row, column or region.

Incorrect values
You are notified when you enter a digit in the wrong cell.

Input mode

Cell first
First select a cell. Then select the digit to insert in it.

Digit first
First select a digit. Then select the cell in which you want to insert it.

Calculate pencilmarks

Overwrite pre-existing pencilmarks

Errors were found !

One or more errors were found in your grid. You have to fix them first in order to get a hint.

Would you like us to display these errors on the grid ?

Missing pencilmarks !

Pencilmarks are missing in one or more cells of your grid. You must first complete the list of possible candidates for each cell in order to get a hint.

Would you like to automatically add pencilmarks in the grid ?

Hint

The hint feature is currently under development. For any questions, or if you find a bug, please contact us on this page.

The hint feature works as follows :

We first check that the grid does not contain any errors. If necessary, we suggest displaying them;
We complete the pencilmarks for each cell;
We are looking for a technique that allows you to eliminate candidates or enter a value. The solution is never given to you directly. We try to put you on the path by taking it step by step, so that you find it yourself.

11/13/2023 : added Naked single and Hidden single techniques (beginner).

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