Calcudoku: 4×4 6×6 8×8 9×9 10×10 8×8 Killer Sudoku Sudoku Level: EasyMediumDifficult EasyMediumDifficult MediumDifficult Difficult Difficult Extra MediumDifficult Medium

One of the World's Hardest Killer Sudokus
can you solve it?
 9 Nov 2012 Today (solution on Sunday) Rating:        Solved 437 times so far , last by
abcdefghi
1
15

19

16

8

19
 1 Clear 2 Undo 3 Bold 4 Pencil 5 6 7 8 9
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

Note that now you have two days to solve this puzzle (submit before Sunday)

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.

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

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