Killer Sudoku, Difficulty 3

Puzzle 2561 Nov 30 November 2010
Puzzle 2568 Dec 1 December 2010
Puzzle 2571 Dec 2 December 2010
Puzzle 2576 Dec 3 December 2010
Puzzle 2581 Dec 4 December 2010
Puzzle 2586 Dec 5 December 2010
Puzzle 2591 Dec 6 December 2010
Puzzle 2596 Dec 7 December 2010
Puzzle 2601 Dec 8 December 2010
Puzzle 2606 Dec 9 December 2010
Daily Killer Sudoku