Killer Sudoku, Difficulty 10

Puzzle 6658 Jan 27 January 2013
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Difficulty 10/10 Average solving time 42 min
Puzzle 6668 Jan 29 January 2013
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Difficulty 10/10 Average solving time 31 min
Puzzle 6678 Jan 31 January 2013
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Difficulty 10/10 Average solving time 30 min
Puzzle 6683 Feb 1 February 2013
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Difficulty 10/10 Average solving time 30 min
Puzzle 6688 Feb 2 February 2013
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Difficulty 10/10 Average solving time 29 min
Puzzle 6693 Feb 3 February 2013
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Difficulty 10/10 Average solving time 37 min
Puzzle 6703 Feb 5 February 2013
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Difficulty 10/10 Average solving time 35 min
Puzzle 6713 Feb 7 February 2013
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Difficulty 10/10 Average solving time 32 min
Puzzle 6718 Feb 8 February 2013
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Difficulty 10/10 Average solving time 19 min
Puzzle 6723 Feb 9 February 2013
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Difficulty 10/10 Average solving time 28 min
Daily Killer Sudoku