Killer Sudoku, Difficulty 10

Puzzle 4247 Oct 3 October 2011
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Difficulty 10/10 Average solving time 40 min
Puzzle 4252 Oct 4 October 2011
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Difficulty 10/10 Average solving time 32 min
Puzzle 4257 Oct 5 October 2011
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Difficulty 10/10 Average solving time 27 min
Puzzle 4267 Oct 7 October 2011
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Difficulty 10/10 Average solving time 36 min
Puzzle 4272 Oct 8 October 2011
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Difficulty 10/10 Average solving time 35 min
Puzzle 4277 Oct 9 October 2011
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Difficulty 10/10 Average solving time 43 min
Puzzle 4287 Oct 11 October 2011
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Difficulty 10/10 Average solving time 46 min
Puzzle 4297 Oct 13 October 2011
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Difficulty 10/10 Average solving time 37 min
Puzzle 4307 Oct 15 October 2011
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Difficulty 10/10 Average solving time 29 min
Puzzle 4317 Oct 17 October 2011
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Difficulty 10/10 Average solving time 32 min
Daily Killer Sudoku