Walkthrough 1 - Hard

Step 5

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

Easy one, the 4s in sections 1 and 8 mean there is only one place for the 4 in section 2

Click here for Step 6