Killer Sudoku, Difficulty 10

Puzzle 12151 Jan 30 January 2016
Puzzle 12156 Jan 31 January 2016
Puzzle 12166 Feb 2 February 2016
Puzzle 12176 Feb 4 February 2016
Puzzle 12186 Feb 6 February 2016
Puzzle 12196 Feb 8 February 2016
Puzzle 12206 Feb 10 February 2016
Puzzle 12216 Feb 12 February 2016
Puzzle 12226 Feb 14 February 2016
Puzzle 12236 Feb 16 February 2016
Daily Killer Sudoku