Daily Killer Sudoku 

Share link – www.brainbashers.com/i610677

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

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

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Objective / Rules
Complete the grid such that every row, every column, and every 3 x 3 block contains the numbers from 1 to 9.
Every cage has a little clue in the corner, and the numbers in each cage must add to the clue.
A number can't appear more than once in a cage (which is different to Calcudoku). I have provided a page that shows possible combinations.

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

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].

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.

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.

Combinations
See all possible cage clues and combinations here.

JavaScript
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