Killer Sudoku, Difficulty 7

Puzzle 170 Feb 24 February 2009
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Difficulty 7/10 Average solving time 38 min
Puzzle 191 Mar 3 March 2009
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Difficulty 7/10 Average solving time 45 min
Puzzle 194 Mar 4 March 2009
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Difficulty 7/10 Average solving time 29 min
Puzzle 200 Mar 6 March 2009
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Difficulty 7/10 Average solving time 50 min
Puzzle 203 Mar 7 March 2009
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Difficulty 7/10 Average solving time 41 min
Puzzle 214 Mar 11 March 2009
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Difficulty 7/10 Average solving time 34 min
Puzzle 227 Mar 15 March 2009
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Difficulty 7/10 Average solving time 38 min
Puzzle 230 Mar 16 March 2009
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Difficulty 7/10 Average solving time 42 min
Puzzle 233 Mar 17 March 2009
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Difficulty 7/10 Average solving time 42 min
Puzzle 254 Mar 24 March 2009
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Difficulty 7/10 Average solving time 47 min
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