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Daily Killer Sudoku

Solve a random Easy, Medium, Hard Japanese-type logic puzzle chosen from today's collection.
Note: If the puzzle doesn't look as it should try using 'Compatibility Mode'.

March 21 - Medium

Auto pencil marks

Show a pinned square

Show errors

Show duplicates

Alternative highlights

Warn when leaving page

Pencil Marks:
Simply enter multiple numbers per square.

Use CTRL+F5 if the page fails to load.

Notes

• Objective / Rules
- Every row, column and 3x3 block must contain the digits 1 to 9.
- Every cage has a little clue in the corner, and digits in each cage must add to the clue.
- For example, a 2 square cage with an 11 clue could be 2 + 9, 3 + 8, 4 + 7 or 5 + 6 (either way around).
- A cage does not contain the same digit more than once (which is different to CalcuDoku).
- We have provided a page that shows possible combinations.

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

• Pencil Marks
Enter a single number as an answer. Enter multiple numbers as pencil marks.

• Keyboard Usage [only when your cursor is in the grid]
Note: not all options work on all browsers.
A = auto-pencil marks (or click the check box) - be careful using this too early in the puzzle, as it will fill in each square with all remaining possibilities.
P = show a pinned square.
CTRL + arrows = move around the grid.
SHIFT + number = highlight all squares with that number [SHIFT+0 to clear]

• Checking
If you click 'Check' the system will tell you to use the 'Show Errors' option to check your solution.

• Uniqueness
Each puzzle has exactly one solution, which can be found using logic alone and no guesses are ever required. If you think you've found another solution, then please double check the rules. If you still think you've found another solution, then please email us and we'll try to help.

• Combinations
See all possible cage clues and combinations here.

• JavaScript
This game requires JavaScript to be enabled.