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Calcudoku:4×46×68×89×910×108×8Killer SudokuSudoku
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One of the World's Hardest Killer Sudokus
can you solve it?

Killer Sudoku

Difficult        

9 Nov 2012 Today   Rating:
(solved 203 time(s) so far)
15

19

16

8

19

15

4

18



7

16

16


12






17


17
17
10

20


7




6

9
7

26

23





12




26






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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