Killer Sudoku, Difficulty 10

Puzzle 3428 May 11 May 2011
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Difficulty 10/10 Average solving time 25 min
Puzzle 3458 May 17 May 2011
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Difficulty 10/10 Average solving time 38 min
Puzzle 3468 May 19 May 2011
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Difficulty 10/10 Average solving time 33 min
Puzzle 3492 May 24 May 2011
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Difficulty 10/10 Average solving time 31 min
Puzzle 3497 May 25 May 2011
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Difficulty 10/10 Average solving time 34 min
Puzzle 3502 May 26 May 2011
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Difficulty 10/10 Average solving time 20 min
Puzzle 3507 May 27 May 2011
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Difficulty 10/10 Average solving time 42 min
Puzzle 3545 Jun 4 June 2011
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Difficulty 10/10 Average solving time 27 min
Puzzle 3570 Jun 9 June 2011
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Difficulty 10/10 Average solving time 25 min
Puzzle 3670 Jun 9 June 2011
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Difficulty 10/10 Average solving time 30 min
Daily Killer Sudoku