Easy Puzzle #28 - One Possible Solution Approach…
	NB:  There is only one final solution to this Sudoku puzzle…
	Rules: Place a number from 1-9 in each empty cell so that each row, each column AND each 3x3 block contains all the numbers from 1-9.
	A	B	C	D	E	F	G	H	I
1
2	AA			BB			CC				Reference to 3x3 Blocks AA, BB & CC
3
4
5	DD			EE			FF				Reference to 3x3 Blocks DD, EE & FF
6
7
8	GG			HH			II				Reference to 3x3 Blocks GG, HH & II
9
	A	B	C	D	E	F	G	H	I
1	8	4			7		9				Easy Puzzle #28 - October 28, 2005
2	9	7		4			5	1			Original puzzle as published © joe-ks.com
3					1			4	8
4		2	9	1
5		6	4			8	1
6	3					7	2	5
7	2	3			4	9	8
8			6			1		9	5
9			5		6			7	2
	A	B	C	D	E	F	G	H	I
1	8	4			7		9				Step 1: #9 is in Rows 1 & 2: #9 MUST go in Cell D3
2	9	7		4			5	1			(#9 in Column F @ F7 excludes use of Cell F3)
3				9	1			4	8
4		2	9	1							Step 2: #5 is in Rows 8 & 9: #5 MUST go in Cell D7…
5		6	4			8	1
6	3					7	2	5
7	2	3		5	4	9	8
8			6			1		9	5
9			5		6			7	2
	A	B	C	D	E	F	G	H	I
1	8	4			7		9				Step 3: #9 is in Columns A & C: #9 MUST go in Cell B9
2	9	7		4			5	1			(#9 in Row 8 @ H8 excludes use of Cell B8)
3				9	1			4	8
4		2	9	1
5		6	4			8	1
6	3					7	2	5
7	2	3		5	4	9	8
8			6			1		9	5
9		9	5		6			7	2
	A	B	C	D	E	F	G	H	I
1	8	4			7		9				Step 4: #7 is in Rows 1 & 2: #7 MUST go in Cell G3…
2	9	7		4			5	1
3	6			9	1		7	4	8		Step 5: #6 is in Columns B & C: #6 MUST go in Cell A3…
4		2	9	1
5		6	4			8	1
6	3					7	2	5
7	2	3		5	4	9	8
8			6			1		9	5
9		9	5		6			7	2
	A	B	C	D	E	F	G	H	I
1	8	4			7		9				Step 6: Block AA needs #5: #5 MUST go in Cell B3
2	9	7		4			5	1			(#5 in Column C @ C9 excludes use of Cells C1, C2 & C3)
3	6	5		9	1		7	4	8
4		2	9	1							Step 7: #7 is in Columns E & F: #7 MUST go in Cell D8
5		6	4			8	1				(#7 in Row 9 excludes use of Cell D9)
6	3					7	2	5
7	2	3		5	4	9	8
8			6	7		1		9	5
9		9	5		6			7	2
	A	B	C	D	E	F	G	H	I
1	8	4			7		9				Step 8: Block BB needs #8: #8 MUST go in Cell E2
2	9	7		4	8		5	1			(#8 in Row 1 @ A1 excludes use of Cells D1 & F1, &
3	6	5		9	1		7	4	8		#8 in Column F @ F5 excludes use of Cells F1, F2 & F3)
4		2	9	1
5		6	4			8	1				Step 9: #7 is in Rows 8 & 9: #7 MUST go in Cell C7…
6	3					7	2	5
7	2	3	7	5	4	9	8
8			6	7		1		9	5
9		9	5		6			7	2
	A	B	C	D	E	F	G	H	I
1	8	4			7	5	9				Step 10: Block GG needs #1: #1 MUST go in Cell A9
2	9	7		4	8		5	1			(#1 in Row 8 @ F8 excludes use of Cells A8 & B8)
3	6	5		9	1		7	4	8
4		2	9	1							Step 11: #5 is in Rows 2 & 3: #5 MUST go in Cell F1
5		6	4			8	1				(#5 in Column D @ D7 excludes use of Cell D1)
6	3					7	2	5
7	2	3	7	5	4	9	8
8			6	7		1		9	5
9	1	9	5		6			7	2
	A	B	C	D	E	F	G	H	I
1	8	4			7	5	9				Step 12: Complete Block GG: need #s 4 & 8…
2	9	7		4	8		5	1			#8 can't go in Cell A8 (cf #8 in Column A @ A1), so
3	6	5		9	1		7	4	8		#8 MUST go in Cell B8, & therefore #4 MUST go in Cell A8
4		2	9	1
5		6	4			8	1				Step 13: #8 is now in Columns A& B: #8 MUST go in Cell C6
6	3		8			7	2	5
7	2	3	7	5	4	9	8				Step 14: #4 is now in Rows 7 & 8: #4 MUST go in Cell G9…
8	4	8	6	7		1		9	5
9	1	9	5		6		4	7	2
	A	B	C	D	E	F	G	H	I
1	8	4			7	5	9				Step 15: #2 is in Rows 7 & 9: #2 MUST go in Cell E8…
2	9	7		4	8		5	1
3	6	5		9	1		7	4	8		Step 16: #1 is in Rows 4 & 5: #1 MUST go in Cell B6…
4		2	9	1
5		6	4			8	1
6	3	1	8			7	2	5
7	2	3	7	5	4	9	8
8	4	8	6	7	2	1		9	5
9	1	9	5		6		4	7	2
	A	B	C	D	E	F	G	H	I
1	8	4			7	5	9				Step 17: Complete Block HH: need #s 3 & 8…
2	9	7		4	8		5	1			#8 can't go in Cell F9 (cf #8 in Column F @ F5), so
3	6	5		9	1		7	4	8		#8 MUST go in Cell D9, & therefore #3 MUST go in Cell F9
4		2	9	1
5		6	4			8	1				Step 18: #3