Killer Sudoku, Difficulty 10

Puzzle 13911 Jan 16 January 2017
Puzzle 13916 Jan 17 January 2017
Puzzle 13921 Jan 18 January 2017
Puzzle 13931 Jan 20 January 2017
Puzzle 13941 Jan 22 January 2017
Puzzle 13951 Jan 24 January 2017
Puzzle 13961 Jan 26 January 2017
Puzzle 13971 Jan 28 January 2017
Puzzle 13981 Jan 30 January 2017
Puzzle 13996 Feb 2 February 2017
Daily Killer Sudoku