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Calcudoku size:4×46×68×89×910×108×8Killer SudokuSudoku
Level:EasyMediumDifficultEasyMediumDifficultMediumDifficultDifficultDifficultExtraMediumDifficultMedium

One of the World's Hardest Killer Sudokus
can you solve it?
9 Nov 2012 Today
     Rating:  
     Solved 312 times so far
abcdefghi
1 
15

19

16

8

19
2 

15

4

18



3 
7

16

16


12

4 





17


17
5 
17
10

20


7


6 


6

9
7

26

7 
23





12


8 


26






9 
21




12

10

You can solve the puzzle using the number + arrow keys, or the mouse. Use shift + number to toggle guesses, the space bar to clear a cell, and 'backspace' for undo. Press '=' to highlight the number in a cell.

A Killer Sudoku is the same as a Calcudoku puzzle, except:

  • the operator is always + (and not shown)
  • every 3×3 box has the numbers 1..9 exactly once
  • a cage also can not have duplicate numbers (!)

You can also solve the puzzles on the iPhone/iPod Touch/iPad and the Kindle 3.


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