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Calcudoku size:4×45×56×67×79×98×8Killer SudokuSudoku
Level:EasyMediumDifficultEasyDifficultEasyMediumDifficultMediumDifficultDifficultExtraEasyEasyMedium
13 Aug 2012   Show solution   Rating:
Points: 5 (solved 229 time(s) so far)
abcdefghi
1 
16
11

8

7
7
8

2 

5
17

14


15

3 
6




7
12

15
4 

10
11
16

17

6

5 
9



13



9
6 

15
9


19

21

7 
19


9
21

8


8 


10





16
9 

7

5

7



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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All puzzles published on this site are © Patrick Min. Send your ideas and suggestions to



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