Easy Puzzle #6 - 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			1						2		Easy Puzzle #6 - October 6, 2005
2			7	3		6	5	1			Original puzzle as published on joe-ks.com…
3	3	2			1			4	7
4			8			7		9	5
5	7	6			5			8	4
6		9	2	4	6				3
7		7	9	5				3	6
8	6	1					9
9		3			9	2		5	1
	A	B	C	D	E	F	G	H	I
1			1				3		2		Step 1: #3 is in Rows 2 & 3: #3 MUST go in Cell G1
2			7	3		6	5	1			(NB: can’t go in H1 as #3 is in Column H @ H7)
3	3	2			1			4	7
4			8			7		9	5
5	7	6			5			8	4
6		9	2	4	6				3
7		7	9	5				3	6		Step 2: #5 is in Rows 7 & 9: #5 MUST go in Cell C8…
8	6	1	5				9
9		3			9	2		5	1
	A	B	C	D	E	F	G	H	I
1			1				3		2		Step 3: #3 is in Columns A & B: #3 MUST go in Cell C5…
2			7	3		6	5	1	9
3	3	2			1			4	7		Step 4: #6 is in Columns E & F: #6 MUST go in Cell D9
4			8			7		9	5		(NB: can’t go in D8 as #6 is in Row 8 @ A8)
5	7	6	3		5			8	4
6		9	2	4	6				3		Step 5: #9 is in Columns G & H: #9 MUST go in Cell I2…
7		7	9	5				3	6
8	6	1	5				9
9		3		6	9	2		5	1
	A	B	C	D	E	F	G	H	I
1			1				3		2		Step 6: Only one # required for Column I…
2			7	3		6	5	1	9		#8 MUST go in Cell I8…
3	3	2			1			4	7
4			8			7		9	5		Step 7: #8 is in Rows 4 & 5: #8 MUST go in Cell F6…
5	7	6	3		5			8	4
6		9	2	4	6	8			3
7		7	9	5				3	6
8	6	1	5				9		8
9		3		6	9	2		5	1
	A	B	C	D	E	F	G	H	I
1			1				3	6	2		Step 8: #6 is in Rows 5 & 6: #6 MUST go in Cell G4…
2			7	3		6	5	1	9
3	3	2			1			4	7		Step 9: Now #6 is in Columns G & I: #6 MUST go in Cell H1…
4			8			7	6	9	5
5	7	6	3		5			8	4		Step 10: #1 is in Rows 8 & 9: #1 MUST go in Cell F7
6		9	2	4	6	8			3		(because #1 is already in Column E @ E3)
7		7	9	5		1		3	6
8	6	1	5				9		8
9		3		6	9	2		5	1
	A	B	C	D	E	F	G	H	I
1			1				3	6	2		Step 11: Only one # required for Block CC…
2			7	3		6	5	1	9		#8 MUST go in Cell G3…
3	3	2	6		1		8	4	7
4			8		3	7	6	9	5		Step #12: #6 is in Rows 1 & 2: #6 MUST go in Cell C3…
5	7	6	3		5			8	4
6		9	2	4	6	8			3		Step 13: #3 is in Rows 5 & 6: #3 MUST go in Cell E4
7		7	9	5		1		3	6
8	6	1	5			3	9		8		Step 14: #3 is in Rows 7 & 9: #3 MUST go in Cell F8
9		3		6	9	2		5	1		(see Step 13 re #3s now in Columns D & E…)
	A	B	C	D	E	F	G	H	I
1			1				3	6	2		Step 15: Row 3 needs two more #s: #5 & #9:
2			7	3		6	5	1	9		#5 can't go in Cell D3 ('cause #5 is in Column D @ D7), so
3	3	2	6	9	1	5	8	4	7		#5 MUST go in Cell F3, and #9 MUST go in Cell D3…
4			8		3	7	6	9	5
5	7	6	3		5	9		8	4		Step 16: #9 is now in Columns D & E: #9 MUST go in Cell F5
6		9	2	4	6	8			3
7		7	9	5		1		3	6
8	6	1	5			3	9		8
9		3		6	9	2		5	1
	A	B	C	D	E	F	G	H	I
1			1				3	6	2		Step 17: #2 is needed in Block F: #2 MUST go in Cell G5
2			7	3	2	6	5	1	9		(because #2 in Row 6 excludes Cells G6 & H6…)
3	3	2	6	9	1	5	8	4	7
4			8		3	7	6	9	5		Step 18: #2 is in Rows 1 & 3: #2 MUST go in Cell E2…
5	7	6	3		5	9	2	8	4
6		9	2	4	6	8			3
7		7	9	5		1		3	6
8	6	1	5			3	9		8
9		3		6	9	2		5	1
	A	B	C	D	E	F	G	H	I
1	9		1				3	6	2		Step 19: Block II needs a #2: #2 MUST go in Cell H8
2			7	3	2	6	5	1	9		(because #2s in Row 9 & Column G exclude G7 & G9)
3	3	2	6	9	1	5	8	4	7
4			8		3	7	6	9	5		Step 20: Now we have #2 in Rows 8 & 9: #2 MUST go in A7…
5	7	6	3		5	9	2	8	4
6		9	2	4	6	8			3		Step 21: #9 is in Rows 2 & 3: #9 MUST go in Cell A1
7	2	7	9	5		1		3	6		(because #9 in Column B @ B6 excludes B1…)
8	6	1	5			3	9	2	8
9		3		6	9	2		5	1
	A	B	C	D	E	F	G	H	I
1	9		1				3	6	2		Step 22: Block HH needs #8: #8 MUST go in Cell E7
2			7	3	2	6	5	1	9		(because #8 in Row 8 @ I8 excludes Cells D8 & E8…)
3	3	2	6	9	1	5	8	4	7
4			8		3	7	6	9	5		Step 23: Now there are #8's in Rows 7 & 8…
5	7	6	3		5	9	2	8	4		#8 MUST go in Cell A9 (because of #8 in Column C @ C4)
6		9	2	4	6	8	1		3
7	2	7	9	5	8	1		3	6		Step 24: #1 is in Columns H & I: #1 MUST go in Cell G6…
8	6	1	5			3	9	2	8
9	8	3		6	9	2		5	1
	A	B	C	D	E	F	G	H	I