Sudoku Game: HA-13 Hard

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