Easy Puzzle #47 - One Possible Solution Approach…
	NB:  There is only one final solution to this Sudoku puzzle…
	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	6	8		7	3				5		Easy Puzzle #47 - November 16, 2005
2		3				2	6				Original puzzle as published © joe-ks.com
3			4		6			7	8
4		7			2	5			6
5	8		1
6		4	2			8		1	3
7		5	8		7	3			4
8		9	6	4		1		5	7
9					5	6	8	3	1
	A	B	C	D	E	F	G	H	I
1	6	8		7	3				5		Step 1: #6 is in Columns A & C: #6 MUST go in Cell B5...
2		3				2	6
3			4		6		3	7	8		Step 2: #6 is now in Rows 4 & 5: #6 MUST go in Cell D6
4		7			2	5			6		(#6 in Column E @ #3 excludes use of Cell E6)
5	8	6	1
6		4	2	6		8		1	3		Step 3: #3 is in Columns H & I: #3 MUST go in Cell G3
7		5	8		7	3			4		(#3 in Row 1 @ E1 excludes use of Cell G1)
8		9	6	4		1		5	7
9					5	6	8	3	1
	A	B	C	D	E	F	G	H	I
1	6	8		7	3				5		Step 4: #4 is in Columns B & C: #4 MUST go in Cell A9
2		3				2	6				(#4 in Row 7 @ I7 excludes use of Cell A7, &
3			4		6		3	7	8		#4 in Row 8 @ D8 excludes use of Cell A8).
4		7			2	5			6
5	8	6	1			7					Step 5: #7 is in Columns D & E: #7 MUST go in Cell F5...
6		4	2	6		8	7	1	3
7		5	8		7	3			4		Step 6: #7 is now in Rows 4 & 5: #7 MUST go in Cell G6...
8		9	6	4		1		5	7
9	4				5	6	8	3	1
	A	B	C	D	E	F	G	H	I
1	6	8		7	3				5		Step 7: #6 is in Columns G & I: #6 MUST go in Cell H7...
2		3				2	6
3			4		6		3	7	8		Step 8: #8 is in Columns G & I: #8 MUST go in Cell H4
4		7			2	5		8	6		(#8 in Row 5 @ A5 excludes use of Cell H5)
5	8	6	1			7
6		4	2	6		8	7	1	3
7		5	8		7	3		6	4
8		9	6	4		1		5	7
9	4				5	6	8	3	1
	A	B	C	D	E	F	G	H	I
1	6	8		7	3	4			5		Step 9: Complete Column B: need #s 1 & 2…
2		3				2	6				#1 can't go in Cell B9 (cf #1 in Row 9 ! I9), so
3		1	4		6	9	3	7	8		#1 MUST go in Cell B3, & therefore #2 MUST go in Cell B9
4		7			2	5		8	6
5	8	6	1			7					Step 10: Complete Column F: need #s 4 & 9…
6		4	2	6		8	7	1	3		#4 can't go in Cell F3 (cf #4 in Row 3 @ C3), so
7		5	8		7	3		6	4		#4 MUST go in Cell F1, & therefore #9 MUST go in Cell F3
8		9	6	4		1		5	7
9	4	2			5	6	8	3	1
	A	B	C	D	E	F	G	H	I
1	6	8		7	3	4			5		Step 11: Complete Row 6: need #s 5 & 9…
2		3				2	6				#5 can't go in Cell E6 (cf #5 in Column E @ E9), so
3	2	1	4	5	6	9	3	7	8		#5 MUST go in Cell A6, & therefore #9 MUST go in Cell E6
4		7			2	5		8	6
5	8	6	1			7					Step 12: Complete Row 3: need #s 2 & 5…
6	5	4	2	6	9	8	7	1	3		#5 can't go in Cell A3 (cf #5 from Step 11 @ A6), so
7		5	8		7	3		6	4		#5 MUST go in Cell D3, & therefore #2 MUST go in Cell A3
8		9	6	4		1		5	7
9	4	2			5	6	8	3	1
	A	B	C	D	E	F	G	H	I
1	6	8		7	3	4			5		Step 13: Complete Block II: need #s 2 & 9…
2		3				2	6	4			#9 can't go in Cell G8 (cf #9 in Row 8 @ B8), so
3	2	1	4	5	6	9	3	7	8		#9 MUST go in Cell G7, & therefore #2 MUST go in Cell G8
4		7		1	2	5		8	6
5	8	6	1			7					Step 14: #4 is in Rows 1 & 3: #4 MUST go in Cell H2
6	5	4	2	6	9	8	7	1	3		(#4 in Column I @ I7 excludes use of Cell I2)
7		5	8		7	3	9	6	4
8		9	6	4		1	2	5	7		Step 15: #1 is in Rows 5 & 6: #1 MUST go in Cell D4...
9	4	2			5	6	8	3	1
	A	B	C	D	E	F	G	H	I
1	6	8		7	3	4			5		Step 16: Complete Column I: need #s 2 & 9…
2		3				2	6	4	9		#2 can't go in Cell I2 (cf #2 in Row 2 @ F2), so
3	2	1	4	5	6	9	3	7	8		#2 MUST go in Cell I5, & therefore #9 MUST go in Cell I2
4		7		1	2	5		8	6
5	8	6	1	3	4	7			2		Step 17: Complete Block EE: need #s 3 & 4…
6	5	4	2	6	9	8	7	1	3		#3 can't go in Cell E5 (cf #3 in Column E @ E1), so
7		5	8		7	3	9	6	4		#3 MUST go in Cell D5, & therefore #4 MUST go in Cell E5
8		9	6	4		1	2	5	7
9	4	2			5	6	8	3	1
	A	B	C	D	E	F	G	H	I
1	6	8		7	3	4			5		Step 18: Complete Block BB: need #s 1 & 8…
2	7	3		8	1	2	6	4	9		#1 can't go in Cell D2 (cf #1 in Column D @ D4), so
3	2	1	4	5	6	9	3	7	8		#1 MUST go in Cell E2, & therefore #8 MUST go in Cell D2
4		7		1	2	5		8	6
5	8	6	1	3	4	7			2		Step 19: #8 is now in Columns D & F: #8 MUST go in Cell E8...
6	5	4	2	6	9	8	7	1	3
7		5	8		7	3	9	6	4		Step 20: #7 is in Rows 7 & 8: #7 MUST go in Cell C9…
8		9	6	4	8	1	2	5	7
9	4	2	7		5	6	8	3	1		Step 21: #7 is now in Columns B & C: #7 MUST go in Cell A2...
	A	B	C	D	E	F	G	H	I
1	6	8	9	7	3	4			5		Step 22: Complete Row 2: #5 MUST go in Cell C2…
2	7	3	5	8	1	2	6	4	9
3	2	1	4	5	6	9	3	7	8		Step 23: Complete Block AA: #9 MUST go in Cell C1…
4	9	7	3	1	2	5	4	8	6
5	8	6	1	3	4	7			2		Step 24: Complete Block DD: need #s 3 & 9…
6	5	4	2	6	9	8	7	1	3		#9 can't go in Cell C4 (cf #9 from Step 23), so
7		5	8		7	3	9	6	4		#9 MUST go in Cell A4, & therefore #3 MUST go in Cell C4
8		9	6	4	8	1	2	5	7
9	4	2	7		5	6	8	3	1		Step 25: Complete Row 4: #4 MUST go in Cell G4…
	A	B	C	D	E	F	G	H	I
1	6	8	9	7	3	4			5		Step 26: Complete Block GG: need #s 1 & 3…
2	7	3	5	8	1	2	6	4	9		#3 can't go in Cell A7 (cf #3 in Row 7 @ F7), so
3	2	1	4	5	6	9	3	7	8		#3 MUST go in Cell A8, & therefore #1 MUST go in Cell A7
4	9	7	3	1	2	5	4	8	6
5	8	6	1	3