Killer Sudoku, Difficulty 3

Puzzle 8183 Nov 28 November 2013
Puzzle 8193 Nov 30 November 2013
Puzzle 8203 Dec 2 December 2013
Puzzle 8213 Dec 4 December 2013
Puzzle 8223 Dec 6 December 2013
Puzzle 8233 Dec 8 December 2013
Puzzle 8243 Dec 10 December 2013
Puzzle 8253 Dec 12 December 2013
Puzzle 8263 Dec 14 December 2013
Puzzle 8273 Dec 16 December 2013
Daily Killer Sudoku