Easy Puzzle #30 - 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		6	1	2		7			Easy Puzzle #30 - October 30, 2005
2	2			3		7			6		Original puzzle as published © joe-ks.com
3	6		5	9		8	2		3
4		4						5
5	7	1						9	8
6		6						2
7	4		9	5		6	7		1
8	1			8		4			2
9		3		2	9	1		6
	A	B	C	D	E	F	G	H	I
1		8		6	1	2		7			Step 1: #7 is in Rows 1 & 2: #7 MUST go in Cell B3...
2	2			3		7			6
3	6	7	5	9		8	2		3
4		4						5			Step 2: #9 is in Rows 7 & 9: #9 MUST go in Cell G8
5	7	1						9	8		(#9 in Column H @ H5 excludes use of Cell H8)
6		6						2
7	4		9	5		6	7		1
8	1			8		4	9		2
9		3		2	9	1		6
	A	B	C	D	E	F	G	H	I
1		8		6	1	2		7	9		Step 3: #6 is in Columns A & B: #6 MUST go in Cell C8
2	2			3		7			6		(#6 in Row 9 @ H9 excludes use of Cell C9)
3	6	7	5	9		8	2		3
4		4						5			Step 4: #9 is in Columns G & H: #9 MUST go in Cell I1…
5	7	1						9	8
6		6						2
7	4		9	5		6	7		1
8	1		6	8		4	9		2
9		3		2	9	1		6
	A	B	C	D	E	F	G	H	I
1		8		6	1	2	5	7	9		Step 5: Complete Block BB: need #s 4 & 5…
2	2			3	5	7			6		#5 can't go in Cell E3 (cf #5 in Row 3 @ C3), so
3	6	7	5	9	4	8	2		3		#5 MUST go in Cell E2, & therefore #4 MUST go in Cell E3
4		4						5
5	7	1						9	8		Step 6: #5 is now in Rows 2 & 3: #5 MUST go in Cell G1…
6		6						2
7	4		9	5	3	6	7		1		Step 7: Complete Box HH: need #s 3 & 7…
8	1		6	8	7	4	9		2		#7 can't go in Cell E7 (cf #7 in Row 7 @ G7), so
9		3		2	9	1		6			#7 MUST go in Cell E8, & therefore #3 MUST go in Cell E7
	A	B	C	D	E	F	G	H	I
1		8		6	1	2	5	7	9		Step 8: #1 is in Columns A & B: #1 MUST go in Cell C2
2	2		1	3	5	7			6		(#1 in Row 1 @ E1 excludes use of Cell C1)
3	6	7	5	9	4	8	2	1	3
4		4						5			Step 9: #1 is now in Rows 1 & 2: #1 MUST go in Cell H3...
5	7	1						9	8
6		6						2			Step 10: #2 is in Rows 8 & 9: #2 MUST go in Cell B7...
7	4	2	9	5	3	6	7		1
8	1		6	8	7	4	9		2
9		3		2	9	1		6
	A	B	C	D	E	F	G	H	I
1		8		6	1	2	5	7	9		Step 11: #7 is in Columns A & B: #7 MUST go in Cell C9...
2	2		1	3	5	7			6
3	6	7	5	9	4	8	2	1	3		Step 12: #5 is in Columns G & H: #5 MUST go in Cell I9...
4		4						5
5	7	1						9	8		Step 13: #5 is now in Rows 7 & 9: #5 MUST go in Cell B8,,,
6		6						2
7	4	2	9	5	3	6	7		1
8	1	5	6	8	7	4	9		2
9		3	7	2	9	1		6	5
	A	B	C	D	E	F	G	H	I
1		8		6	1	2	5	7	9		Step 14: Complete Block GG: #8 MUST go in Cell A9...
2	2		1	3	5	7	8	4	6
3	6	7	5	9	4	8	2	1	3		Step 15: #8 is now in Rows 8 & 9: #8 MUST go in Cell H7...
4		4						5
5	7	1						9	8		Step 16: #8 is now in Columns H & I: #8 MUST go in Cell G2
6		6						2
7	4	2	9	5	3	6	7	8	1		Step 17: Complete Block CC: #4 MUST go in Cell H2...
8	1	5	6	8	7	4	9		2
9	8	3	7	2	9	1		6	5
	A	B	C	D	E	F	G	H	I
1		8		6	1	2	5	7	9		Step 18: Complete Column B: #9 MUST go in Cell B2...
2	2	9	1	3	5	7	8	4	6
3	6	7	5	9	4	8	2	1	3		Step 19: Complete Column H: #3 MUST go in Cell H8...
4		4						5
5	7	1						9	8
6		6						2
7	4	2	9	5	3	6	7	8	1
8	1	5	6	8	7	4	9	3	2
9	8	3	7	2	9	1		6	5
	A	B	C	D	E	F	G	H	I
1	3	8	4	6	1	2	5	7	9		Step 20: Complete Column I: need #s 4 & 7…
2	2	9	1	3	5	7	8	4	6		#4 can't go in Cell I4 (cf #4 in Row 4 @ B4), so
3	6	7	5	9	4	8	2	1	3		#4 MUST go in Cell I6, & therefore #7 MUST go in Cell I4
4		4						5	7
5	7	1						9	8		Step 21: Complete Block AA: need #s 3 & 4…
6		6						2	4		#4 can't go in Cell A1 (cf #4 in Column A @ A7), so
7	4	2	9	5	3	6	7	8	1		#4 MUST go in Cell C1, & therefore #3 MUST go in Cell A1
8	1	5	6	8	7	4	9	3	2
9	8	3	7	2	9	1		6	5
	A	B	C	D	E	F	G	H	I
1	3	8	4	6	1	2	5	7	9		Step 22: Complete Column A: need #s 5 & 9…
2	2	9	1	3	5	7	8	4	6		#5 can't go