# Daily Sudoku

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Feb 07 - Hard [0:00]

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## Today's Sudoku Puzzles

Note: take a look at the information about the difficulty levels.

All daily items change at midnight GMT – set your local time zone.

## Notes

Objective / Rules
Complete the grid such that every row, every column, and every 3 × 3 block contains the numbers from 1 to 9.
Sudoku is a game of logic and no mathematics is required to solve the puzzles.

Help
Read the help page on Sudoku puzzles for a more detailed explanation.

Pencil Marks
What is a pencil mark? Pencil marks can help you keep track of your own thinking, simply enter more than one digit / letter into each square, just like you might do if you were using pen and paper. The size of the digits / letters is smaller when there is more than one digit / letter in a square. A square might contain more pencil mark digits / letters than can be shown.

Usage
Note: only when supported by your computer / device / browser / etc (and only when your cursor is in the grid).
a = auto-pencil marks (or click the 'pencil' button).
p = show a pinned square.
CTRL + arrows = move around the grid (you might need to press SHIFT as well).
SHIFT + digit = highlight all squares with that digit [SHIFT + 0 to clear].

Uniqueness
This puzzle has exactly one correct answer, which can be found using logic and deduction alone, and no guesses are required. If you think that you have found another answer, then please check the rules carefully for a reason the other answer isn't allowed.

Checking
If you click 'check' the system will check for single-digit squares that don't match the answer (squares with pencil marks are not checked). You have to select 'show mistakes' to see the mistakes.

Printing
Only BrainBashers Sudoku can be printed (the starting grid, without pencil marks).

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