Killer Sudoku, Difficulty 7

Puzzle 5989 Sep 17 September 2012
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Difficulty 7/10 Average solving time 32 min
Puzzle 6463 Dec 19 December 2012
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Difficulty 7/10 Average solving time 42 min
Puzzle 6999 Apr 5 April 2013
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Difficulty 7/10 Average solving time 41 min
Puzzle 7469 Jul 8 July 2013
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Difficulty 7/10 Average solving time 32 min
Puzzle 7959 Oct 14 October 2013
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Difficulty 7/10 Average solving time 25 min
Puzzle 7999 Oct 22 October 2013
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Difficulty 7/10 Average solving time 33 min
Puzzle 8094 Nov 10 November 2013
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Difficulty 7/10 Average solving time 44 min
Puzzle 8254 Dec 12 December 2013
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Difficulty 7/10 Average solving time 37 min
Puzzle 8489 Jan 28 January 2014
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Difficulty 7/10 Average solving time 43 min
Puzzle 8859 Apr 12 April 2014
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Difficulty 7/10 Average solving time 33 min
Daily Killer Sudoku