Sudoku #2831

Level: Hard

 Fun Fact About 2
Wayne Gould, New Zealander and retired Hong Kong judge, calls himself the stepfather of Sudoku. He stumbled upon a Sudoku book in Tokyo while vacationing there.

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

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