Killer Sudoku, Difficulty 3

Puzzle 6566 Jan 9 January 2013
Puzzle 6576 Jan 11 January 2013
Puzzle 6586 Jan 13 January 2013
Puzzle 6596 Jan 15 January 2013
Puzzle 6606 Jan 17 January 2013
Puzzle 6616 Jan 19 January 2013
Puzzle 6626 Jan 21 January 2013
Puzzle 6636 Jan 23 January 2013
Puzzle 6646 Jan 25 January 2013
Puzzle 6656 Jan 27 January 2013
Daily Killer Sudoku