Killer Sudoku, Difficulty 7

Puzzle 3576 Mar 21 March 2011
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Difficulty 7/10 Average solving time 42 min
Puzzle 3579 Mar 23 March 2011
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Difficulty 7/10 Average solving time 41 min
Puzzle 3618 Apr 30 April 2011
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Difficulty 7/10 Average solving time 44 min
Puzzle 3757 Jun 27 June 2011
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Difficulty 7/10 Average solving time 52 min
Puzzle 3797 Jul 5 July 2011
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Difficulty 7/10 Average solving time 39 min
Puzzle 3917 Jul 29 July 2011
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Difficulty 7/10 Average solving time 20 min
Puzzle 4976 Feb 27 February 2012
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Difficulty 7/10 Average solving time 20 min
Puzzle 5111 Mar 25 March 2012
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Difficulty 7/10 Average solving time 28 min
Puzzle 5226 Apr 17 April 2012
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Difficulty 7/10 Average solving time 26 min
Puzzle 5805 Aug 11 August 2012
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Difficulty 7/10 Average solving time 27 min
Daily Killer Sudoku