Killer Sudoku, Difficulty 10

Puzzle 6244 Nov 7 November 2012
Puzzle 6254 Nov 9 November 2012
Puzzle 6259 Nov 10 November 2012
Puzzle 6264 Nov 11 November 2012
Puzzle 6274 Nov 13 November 2012
Puzzle 6284 Nov 15 November 2012
Puzzle 6294 Nov 17 November 2012
Puzzle 6304 Nov 19 November 2012
Puzzle 6311 Nov 21 November 2012
Puzzle 6313 Nov 21 November 2012
Daily Killer Sudoku