# Daily CalcuDoku

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Oct 02 - 7 × 7 - Hard

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## Today's CalcuDoku 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 and column contains the numbers 1 to the size of the grid.
Every row and column contains each number exactly once.
A cage clue tells you the answer after the cage values have undergone the specified mathematical operation.
The clues don't tell you which way round the numbers are, just the answer to the calculation.
A number can appear more than once in a cage.

Help
Read the help / walkthrough page on CalcuDoku 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 check box).
CTRL + arrows = move around the grid (you might need to press SHIFT as well).
SHIFT + number = highlight all squares with that number [SHIFT+0 to clear].

Checking
If you click 'check' the system will check for incorrect squares. If 'show mistakes when checking' is ticked / checked they will be marked in red. There are two types of error checked for:
• a single number that isn't the same as the answer
• multiple numbers that don't contain the answer number

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.

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