Killer Sudoku, Difficulty 7

Puzzle 257 Mar 25 March 2009
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Difficulty 7/10 Average solving time 37 min
Puzzle 263 Mar 27 March 2009
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Difficulty 7/10 Average solving time 49 min
Puzzle 266 Mar 28 March 2009
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Difficulty 7/10 Average solving time 41 min
Puzzle 272 Mar 30 March 2009
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Difficulty 7/10 Average solving time 28 min
Puzzle 287 Apr 4 April 2009
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Difficulty 7/10 Average solving time 41 min
Puzzle 305 Apr 10 April 2009
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Difficulty 7/10 Average solving time 45 min
Puzzle 320 Apr 15 April 2009
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Difficulty 7/10 Average solving time 45 min
Puzzle 347 Apr 24 April 2009
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Difficulty 7/10 Average solving time 31 min
Puzzle 368 May 1 May 2009
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Difficulty 7/10 Average solving time 40 min
Puzzle 380 May 5 May 2009
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Difficulty 7/10 Average solving time 37 min
Daily Killer Sudoku