Killer Sudoku, Difficulty 3

Puzzle 6197 Oct 29 October 2012
Puzzle 6207 Oct 31 October 2012
Puzzle 6212 Nov 1 November 2012
Puzzle 6222 Nov 3 November 2012
Puzzle 6232 Nov 5 November 2012
Puzzle 6242 Nov 7 November 2012
Puzzle 6252 Nov 9 November 2012
Puzzle 6262 Nov 11 November 2012
Puzzle 6272 Nov 13 November 2012
Puzzle 6282 Nov 15 November 2012
Daily Killer Sudoku