Killer Sudoku, Difficulty 10

Puzzle 4147 Sep 13 September 2011
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Difficulty 10/10 Average solving time 48 min
Puzzle 4157 Sep 15 September 2011
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Difficulty 10/10 Average solving time 30 min
Puzzle 4167 Sep 17 September 2011
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Difficulty 10/10 Average solving time 35 min
Puzzle 4177 Sep 19 September 2011
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Difficulty 10/10 Average solving time 29 min
Puzzle 4187 Sep 21 September 2011
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Difficulty 10/10 Average solving time 31 min
Puzzle 4197 Sep 23 September 2011
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Difficulty 10/10 Average solving time 30 min
Puzzle 4207 Sep 25 September 2011
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Difficulty 10/10 Average solving time 25 min
Puzzle 4217 Sep 27 September 2011
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Difficulty 10/10 Average solving time 50 min
Puzzle 4227 Sep 29 September 2011
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Difficulty 10/10 Average solving time 40 min
Puzzle 4237 Oct 1 October 2011
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Difficulty 10/10 Average solving time 32 min
Daily Killer Sudoku