Medium Puzzle #35 - 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						6			Medium Puzzle #35 - November 4, 2005
2	3	6	7				9	4	5		Original puzzle as published © joe-ks.com
3	8		5	7		6	2
4				1	2	5
5					6
6				9	7	8
7	9		2	6		1	8		7
8	6	8	3				5	2	1
9		7						9
	A	B	C	D	E	F	G	H	I
1		1					7	6			Step 1: #7 is in Rows 2 & 3: #7 MUST go in Cell G1…
2	3	6	7				9	4	5
3	8		5	7		6	2				Step 2: Row 8 needs #7: #7 MUST go in Cell F8
4				1	2	5					(#7 is Column D excludes use of Cell D8, &
5					6						#7 in Column E excludes use of Cell E8)
6				9	7	8
7	9		2	6		1	8		7
8	6	8	3			7	5	2	1
9		7						9
	A	B	C	D	E	F	G	H	I
1		1				9	7	6			Step 3: #9 is in Rows 7 & 9: #9 MUST go in Cell E8
2	3	6	7				9	4	5		(#9 in Column D @ D6 excludes use of Cell D8)
3	8	9	5	7		6	2
4				1	2	5					Step 4: #9 is now in Columns D & E: #9 MUST go in Cell F1
5					6						(#9 in Row 2@ G2 excludes use of Cell F2)
6				9	7	8
7	9		2	6		1	8		7		Step 5: #9 is now in Rows 1 & 2: #9 MUST go in Cell B3…
8	6	8	3		9	7	5	2	1
9		7						9
	A	B	C	D	E	F	G	H	I
1	2	1	4			9	7	6			Step 6: Complete Block AA: need #s 2 & 4…
2	3	6	7				9	4	5		#2 can't go in Cell C1 (cf #2 in Column C @ C7), so
3	8	9	5	7	4	6	2				#2 MUST go in Cell A1, & therefore #4 MUST go in Cell C1
4				1	2	5
5					6	4					Step 7: #4 is now in Rows 1 & 2: #4 MUST go in Cell E3…
6				9	7	8
7	9		2	6		1	8		7		Step 8: Complete Row 8: #4 MUST go in Cell D8...
8	6	8	3	4	9	7	5	2	1
9		7						9			Step 9: #4 is now in Columns D & E: #4 MUST go in Cell F5
	A	B	C	D	E	F	G	H	I
1	2	1	4			9	7	6			Step 10: Complete Block EE: #3 MUST go in Cell D5…
2	3	6	7				9	4	5
3	8	9	5	7	4	6	2
4				1	2	5
5				3	6	4
6				9	7	8
7	9		2	6		1	8		7
8	6	8	3	4	9	7	5	2	1
9		7						9
	A	B	C	D	E	F	G	H	I
1	2	1	4			9	7	6			Step 11: Complete Column F: need #s 2 & 3…
2	3	6	7			2	9	4	5		#3 can't go in Cell F2 (cf #3 in Row 2 @ A2), so
3	8	9	5	7	4	6	2				#3 MUST go in Cell F9, & therefore #2 MUST go in Cell F2
4				1	2	5
5				3	6	4					Step 12: #3 is now in Rows 8 & 9: #3 MUST go in Cell H7…
6				9	7	8
7	9		2	6		1	8	3	7
8	6	8	3	4	9	7	5	2	1
9		7				3		9
	A	B	C	D	E	F	G	H	I
1	2	1	4			9	7	6	8		Step 13: Complete Row 7: need #s 4 & 5…
2	3	6	7			2	9	4	5		#4 can't go in Cell E7 (cf #4 in Column E @ E3), so
3	8	9	5	7	4	6	2				#4 MUST go in Cell B7, & therefore #5 MUST go in Cell E7
4				1	2	5
5				3	6	4					Step 14: Block CC needs #8: #8 MUST go in Cell I1
6				9	7	8					(#8 in Row 3 @ A3 excludes use of Cell H3 & I3)
7	9	4	2	6	5	1	8	3	7
8	6	8	3	4	9	7	5	2	1
9		7				3		9
	A	B	C	D	E	F	G	H	I
1	2	1	4			9	7	6	8		Step 15: Complete Block CC: need #s 1 & 3…
2	3	6	7		1	2	9	4	5		#3 can't go in Cell H3 (cf #3 in Column H @ H7), so
3	8	9	5	7	4	6	2	1	3		#3 MUST go in Cell I3, & therefore #1 MUST go in Cell H3
4				1	2	5
5				3	6	4					Step 16: #1 is now in Rows 1 & 3: #1 MUST go in Cell E2
6				9	7	8					(#1 in Column D @ D4 excludes use of Cell D2)
7	9	4	2	6	5	1	8	3	7
8	6	8	3	4	9	7	5	2	1
9		7				3		9
	A	B	C	D	E	F	G	H	I
1	2	1	4			9	7	6	8		Step 17: #8 is in Rows 1 & 3: #8 MUST go in Cell D2…
2	3	6	7	8	1	2	9	4	5
3	8	9	5	7	4	6	2	1	3
4				1	2	5
5				3	6	4
6				9	7	8
7	9	4	2	6	5	1	8	3	7
8	6	8	3	4	9	7	5	2	1
9		7				3		9
	A	B	C	D	E	F	G	H	I
1	2	1	4	5	3	9	7	6	8		Step 18: Complete Block BB: need #s 3 & 5…
2	3	6	7	8	1	2	9	4	5		#3 can't go in Cell D1 (cf #3 in Column D @ D5), so
3	8	9	5	7	4	6	2	1	3		#3 MUST go in Cell E1, & therefore #5 MUST go in Cell D1
4				1	2	5
5				3	6	4					Step 19: Complete Column D: #2 MUST go in Cell D9…
6				9	7	8
7	9	4	2	6	5	1	8	3	7		Step 20: Complete Column E: #8 MUST go in Cell E9…
8	6	8	3	4	9