Killer Sudoku, Difficulty 10

Puzzle 1478 May 5 May 2010
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Difficulty 10/10 Average solving time 34 min
Puzzle 1487 May 8 May 2010
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Difficulty 10/10 Average solving time 36 min
Puzzle 1496 May 11 May 2010
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Difficulty 10/10 Average solving time 31 min
Puzzle 1508 May 15 May 2010
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Difficulty 10/10 Average solving time 34 min
Puzzle 1511 May 16 May 2010
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Difficulty 10/10 Average solving time 42 min
Puzzle 1553 May 30 May 2010
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Difficulty 10/10 Average solving time 36 min
Puzzle 1556 May 31 May 2010
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Difficulty 10/10 Average solving time 49 min
Puzzle 1559 Jun 1 June 2010
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Difficulty 10/10 Average solving time 43 min
Puzzle 1562 Jun 2 June 2010
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Difficulty 10/10 Average solving time 52 min
Puzzle 1574 Jun 6 June 2010
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Difficulty 10/10 Average solving time 26 min
Daily Killer Sudoku