Killer Sudoku, Difficulty 10

Puzzle 5192 Apr 10 April 2012
Puzzle 5197 Apr 11 April 2012
Puzzle 5202 Apr 12 April 2012
Puzzle 5207 Apr 13 April 2012
Puzzle 5212 Apr 14 April 2012
Puzzle 5217 Apr 15 April 2012
Puzzle 5227 Apr 17 April 2012
Puzzle 5237 Apr 19 April 2012
Puzzle 5247 Apr 21 April 2012
Puzzle 5257 Apr 23 April 2012
Daily Killer Sudoku