Killer Sudoku, Difficulty 7

Puzzle 758 Sep 7 September 2009
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Difficulty 7/10 Average solving time 50 min
Puzzle 761 Sep 8 September 2009
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Difficulty 7/10 Average solving time 52 min
Puzzle 773 Sep 12 September 2009
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Difficulty 7/10 Average solving time 30 min
Puzzle 776 Sep 13 September 2009
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Difficulty 7/10 Average solving time 42 min
Puzzle 815 Sep 26 September 2009
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Difficulty 7/10 Average solving time 50 min
Puzzle 818 Sep 27 September 2009
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Difficulty 7/10 Average solving time 46 min
Puzzle 2121 Sep 11 September 2010
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Difficulty 7/10 Average solving time 28 min
Puzzle 2165 Sep 20 September 2010
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Difficulty 7/10 Average solving time 20 min
Puzzle 2305 Oct 1 October 2010
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Difficulty 7/10 Average solving time 29 min
Puzzle 2407 Aug 10 August 2010
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Difficulty 7/10 Average solving time 36 min
Daily Killer Sudoku