Killer Sudoku, Difficulty 3

Puzzle 6760 Feb 17 February 2013
Puzzle 6770 Feb 19 February 2013
Puzzle 6780 Feb 21 February 2013
Puzzle 6790 Feb 23 February 2013
Puzzle 6800 Feb 25 February 2013
Puzzle 6810 Feb 27 February 2013
Puzzle 6820 Mar 1 March 2013
Puzzle 6830 Mar 3 March 2013
Puzzle 6840 Mar 5 March 2013
Puzzle 6850 Mar 7 March 2013
Daily Killer Sudoku