Killer Sudoku, Difficulty 3

Puzzle 2947 Feb 2 February 2011
Puzzle 2952 Feb 3 February 2011
Puzzle 2956 Feb 4 February 2011
Puzzle 2961 Feb 5 February 2011
Puzzle 2966 Feb 6 February 2011
Puzzle 2971 Feb 7 February 2011
Puzzle 2975 Feb 8 February 2011
Puzzle 2980 Feb 9 February 2011
Puzzle 2985 Feb 10 February 2011
Puzzle 2989 Feb 11 February 2011
Daily Killer Sudoku