Killer Sudoku, Difficulty 3

Puzzle 178 Feb 27 February 2009
Puzzle 181 Feb 28 February 2009
Puzzle 187 Mar 2 March 2009
Puzzle 190 Mar 3 March 2009
Puzzle 223 Mar 14 March 2009
Puzzle 229 Mar 16 March 2009
Puzzle 235 Mar 18 March 2009
Puzzle 238 Mar 19 March 2009
Puzzle 268 Mar 29 March 2009
Puzzle 277 Apr 1 April 2009
Daily Killer Sudoku