Sudoku #3586

Complexity: Extremely Hard

 Fun Fact About Sudoku
The first jigsaw puzzle was created in 1767 when John Spilsbury, an English cartographer, chopped up a wooden map of Britain and challenged the public to reassemble it. He called it a "dissected puzzle."

Enter numbers into the empty cells so that each row, column and 3x3 box contains the numbers 1 to 9.

8 4 7 6 9
6 5 8 4 1
5 2 3 1 7
1 9 7 6 3 2 5
3 1
8 1 5 9 7 6 3
5 9 8 4 7
8 1 6 5 2
3 8 2 1 6