Killer Sudoku, Difficulty 3

Puzzle 489 Jun 10 June 2009
Puzzle 492 Jun 11 June 2009
Puzzle 495 Jun 12 June 2009
Puzzle 504 Jun 15 June 2009
Puzzle 510 Jun 17 June 2009
Puzzle 519 Jun 20 June 2009
Puzzle 531 Jun 24 June 2009
Puzzle 582 Jul 11 July 2009
Puzzle 603 Jul 18 July 2009
Puzzle 612 Jul 21 July 2009
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