Sudoku #2490

Level: Hard

 Fun Fact About 2
There are 6,670,903,752,021,072,936,960 possible combinations for completing a 9-by-9 Sudoku grid, but only 5,472,730,538 of them really count for different solutions. Needlessly to say, you need a handful of lifetimes to solve all of them.

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

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