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Calcudoku:4×45×56×67×79×97×7Killer SudokuSudoku
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16 Apr 2012   Hide solution   Rating: 0 () Points: 1 (solved 279 time(s) so far)
abcd
1 
3+
1
5+
3

2
7+
4
2 

2
5+
4
1
1

3
3 
4
4

1
7+
3
2
2
4 
5+
3

2

4
1
1

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