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Calcudoku:4×45×56×67×78×87×7Killer SudokuSudoku
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2 May 2012   Show solution   Rating: 0 () Points: 1 (solved 196 time(s) so far)
abcd
1 
4
2
4+

2 
4+

6+
7+
3 
3+



4 
7+

1
2

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