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Calcudoku size:4×45×56×68×89×98×8Killer SudokuSudoku
Level:EasyMediumDifficultEasyMediumDifficultEasyMediumDifficultMediumDifficultDifficultExtraEasyMediumEasyMedium
28 Jul 2015 (Tuesday 9x9 solution on Thursday)
     Rating:  
     Points: 5     Solved 72 times so far
abcdefghi
1 
7
17

10
10

6

6
2 

9


10
17
17


3 
12

19
19



22
20
4 




6

2


5 
10

11

5
8



6 
10


8


17


7 
15

5

21

10
11
11
8 

9

8

8



9 
9

2

5

5

8

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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