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Calcudoku size:4×45×56×68×89×97×7Killer SudokuSudoku
Level:EasyMediumDifficultEasyMediumDifficultEasyMediumDifficultMediumDifficultDifficultExtraEasyMediumEasyMedium
21 Aug 2012   Show solution
     Rating:  
     Points: 5     Solved 13 times so far,
abcdefghi
1 
5
9
12

17

7

10
2 


10
7

9
21


3 
13
9

7



7

4 


8

15

10

9
5 
15

6
10
11


18

6 

20


9
11
7

13
7 
17

14






8 



16

18



9 

14


2

19


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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