Killer Sudoku, Difficulty 3

Puzzle 6860 Mar 9 March 2013
Puzzle 6870 Mar 11 March 2013
Puzzle 6880 Mar 13 March 2013
Puzzle 6890 Mar 15 March 2013
Puzzle 6900 Mar 17 March 2013
Puzzle 6910 Mar 19 March 2013
Puzzle 6920 Mar 21 March 2013
Puzzle 6930 Mar 23 March 2013
Puzzle 6940 Mar 25 March 2013
Puzzle 6950 Mar 27 March 2013
Daily Killer Sudoku