Easy Puzzle #16 - 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		1			9	3	5				Easy Puzzle #16 - October 16, 2005
2	3	6		5	8		2	4			Original puzzle as published on joe-ks.com…
3	9	8				6		1
4		2		3			6	8
5		5	8		6				4
6				8	7		1	2
7		4	1	9		7	8	5
8		9		2	1			7	6
9						4		3
	A	B	C	D	E	F	G	H	I
1		1			9	3	5				Step 1: #9 is in Rows 1 & 3: #9 MUST go in Cell I2…
2	3	6		5	8		2	4	9
3	9	8				6		1
4		2		3			6	8			Step 2: #2 is in Rows 4 & 6: #2 MUST go in Cell F5…
5		5	8		6	2			4		(#2 in Column D @ D2 excludes use of Cell D5)
6				8	7		1	2
7		4	1	9		7	8	5			Step 3: #4 is in Rows 7 & 9: #4 MUST go in Cell G8…
8		9		2	1		4	7	6
9						4		3
	A	B	C	D	E	F	G	H	I
1		1			9	3	5				Step 4: #1 is in Rows 1 & 3: #1 MUST go in Cell F2…
2	3	6		5	8	1	2	4	9
3	9	8				6		1
4		2		3			6	8			Step 5: #9 is in Rows 7 & 8: #9 MUST go in Cell G9…
5		5	8		6	2			4		(#9 in Column I @ I2 excludes use of Cell I9)
6				8	7		1	2
7		4	1	9		7	8	5
8		9		2	1		4	7	6
9						4	9	3
	A	B	C	D	E	F	G	H	I
1		1			9	3	5				Step 6: Complete Row 2: #7 MUST go in Cell C2…
2	3	6	7	5	8	1	2	4	9
3	9	8				6		1
4		2		3	4		6	8			Step 7: Block EE needs #4: #4 MUST go in Cell E4
5		5	8		6	2			4		(#4 in Column F @ F9 excludes use of Cells F4 & F6, &
6				8	7		1	2			#4 in Row 5 @ I5 excludes use of Cell D5)
7		4	1	9		7	8	5
8		9		2	1		4	7	6
9						4	9	3
	A	B	C	D	E	F	G	H	I
1		1			9	3	5	6			Step 8: Complete Column H: need #s 6 & 9…
2	3	6	7	5	8	1	2	4	9		#9 can't go in Cell H1 (cf #9 in Row 1 @ E1), so
3	9	8				6		1			#9 MUST go in Cell H5, & therefore #6 MUST go in Cell H1
4		2		3	4		6	8
5		5	8		6	2		9	4		Step 9: Complete Column B: need #s 3 & 7…
6		3		8	7		1	2			#7 can't go in Cell B6 (cf #7 in Row 7 @ F7), so
7		4	1	9		7	8	5			#7 MUST go in Cell B9, & therefore #3 MUST go in Cell B6
8		9		2	1		4	7	6
9		7				4	9	3
	A	B	C	D	E	F	G	H	I
1		1			9	3	5	6			Step 10: #5 is in Rows 1 & 2: #5 MUST go in Cell C3…
2	3	6	7	5	8	1	2	4	9
3	9	8	5			6		1
4		2		3	4		6	8			Step 11: #1 is in Rows 7 & 8: #1 MUST go in Cell I9…
5		5	8		6	2		9	4
6		3		8	7		1	2
7		4	1	9		7	8	5
8		9		2	1		4	7	6
9		7				4	9	3	1
	A	B	C	D	E	F	G	H	I
1		1			9	3	5	6			Step 12: Complete Block II: #2 MUST go in Cell I7…
2	3	6	7	5	8	1	2	4	9
3	9	8	5			6		1
4		2		3	4		6	8			Step 13: Block EE needs #1: #1 MUST go in Cell D5
5		5	8	1	6	2		9	4		(#1 in Column F @ F2 excludes use of Cells F4 & F6)
6		3		8	7		1	2
7		4	1	9		7	8	5	2
8		9		2	1		4	7	6
9		7				4	9	3	1
	A	B	C	D	E	F	G	H	I
1		1			9	3	5	6			Step 14: Complete Row 5: need #s 3 & 7…
2	3	6	7	5	8	1	2	4	9		#3 can't go in Cell A5 (cf #3 in Column A @ A2), so
3	9	8	5			6		1			#3 MUST go in Cell G5, & therefore #7 MUST go in Cell A5
4		2		3	4		6	8
5	7	5	8	1	6	2	3	9	4		Step 15: Complete Row 7: need #s 3 & 6…
6		3		8	7		1	2			#6 can't go in Cell E7 (cf #6 in Column E @ E5), so
7	6	4	1	9	3	7	8	5	2		#6 MUST go in Cell A7, & therefore #3 MUST go in Cell E7
8		9		2	1		4	7	6
9		7				4	9	3	1
	A	B	C	D	E	F	G	H	I
1		1			9	3	5	6			Step 16: Complete Column G: #7 MUST go in Cell G3…
2	3	6	7	5	8	1	2	4	9
3	9	8	5		2	6	7	1
4		2		3	4		6	8			Step 17: Complete Column E: need #s 2 & 5…
5	7	5	8	1	6	2	3	9	4		#5 can't go in Cell E3 (cf #5 in Row 3 @ C3), so
6		3		8	7		1	2			#5 MUST go in Cell E9, & therefore #2 MUST go in Cell E3
7	6	4	1	9	3	7	8	5	2
8		9		2	1		4	7	6
9		7			5	4	9	3	1
	A	B	C	D	E	F	G	H	I
1		1		7	9	3	5	6			Step 18: #7 is in Rows 2 & 3: #7 MUST go in Cell D1…
2	3	6	7	5	8	1	2	4	9
3	9	8	5		2	6	7	1
4		2		3	4		6	8			Step 19: Complete Block HH: need #s 6 & 8…
5	7	5	8	1	6	2	3	9	4		#8 can't go in Cell D9 (cf #8 in Column D @ D6), so
6		3		8	7		1	2			#8 MUST go in Cell F8, & therefore #6 MUST go in Cell D9
7	6	4	1	9	3	7	8	5	2
8		9		2	1	8	4	7	6
9		7		6	5	4	9