Easy Puzzle #36 - 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	4	2	6	7							Easy Puzzle #36 - November 5, 2005
2					5			6			Original puzzle as published © joe-ks.com
3	8					2	7	9	1
4		7			3			8
5			9	1	6	4
6		6			9			3
7	7					3	9	2	6
8					7			1
9	6	9	8	5
	A	B	C	D	E	F	G	H	I
1	4	2	6	7							Step 1: #7 is in Columns A & B: #7 MUST go in Celll C2
2	9		7		5			6			(#7 in Row 3 @ G3 excludes use of Cell C3)
3	8					2	7	9	1
4		7			3			8			Step 2: #9 is in Column B & C: #9 MUST go in Cell A2...
5		8	9	1	6	4
6		6			9			3			Step 3: #8 is in Columns A & C: #8 MUST go in Cell B5...
7	7					3	9	2	6
8					7			1
9	6	9	8	5
	A	B	C	D	E	F	G	H	I
1	4	2	6	7		9					Step 4: #9 is in Rows 2 & 3: #9 MUST go in Cell F1
2	9		7		5			6			(#9 in Column E excludes use of Cell E1)
3	8					2	7	9	1
4		7			3			8			Step 5: #9 is now in Columns E & F: #9 MUST go in Cell D8
5		8	9	1	6	4					(#9 in Row 7 @ G7 excludes use of Cell D7)
6		6			9			3
7	7					3	9	2	6
8				9	7			1
9	6	9	8	5
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 6: #9 is in Columns G & H: #9 MUST go in Cell I4
2	9	1	7		5			6			(#9 in Row 5 @ C5 excludes use of Cell I5, &
3	8					2	7	9	1		#9 in Row 6 @ #6 excludes use of Cell I6)
4		7			3			8	9
5		8	9	1	6	4					Step 7: Block AA needs #1: #1 MUST go in Cell B2
6		6			9			3			(#1 in Row 3 @ I3 excludes use of Cells B3 & C3)
7	7					3	9	2	6
8				9	7			1			Step 8: #1 is now in Rows 2 & 3: E1 MUST go in Cell E1…
9	6	9	8	5
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 9: #6 is in Rows 1 & 2: #6 MUST go in Cell D3
2	9	1	7		5			6			(#6 in Column E @ E5 excludes use of Cell E3)
3	8			6		2	7	9	1
4		7			3		6	8	9		Step 10: #6 is in Rows 5 & 6: #6 MUST go in Cell G4...
5		8	9	1	6	4
6		6			9			3			Step 11: #6 is in Rows 7 & 9: #6 MUST go in Cell F8...
7	7					3	9	2	6
8				9	7	6		1
9	6	9	8	5
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 12: #3 is in Columns E & F: #3 MUST go in Cell D2...
2	9	1	7	3	5			6
3	8			6		2	7	9	1
4		7			3		6	8	9
5		8	9	1	6	4
6		6			9			3
7	7					3	9	2	6
8				9	7	6		1
9	6	9	8	5
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 13: Complete Block BB: need #s 4 & 8…
2	9	1	7	3	5	8		6			#4 can't go in Cell F2 (cf #4 in Column F @ F5), so
3	8			6	4	2	7	9	1		#4 MUST go in Cell E3, & therefore #8 MUST go in Cell F2
4		7			3		6	8	9
5		8	9	1	6	4					Step 14: #4 is now in Columns E & F: #4 MUST go in Cell D7
6		6			9		1	3
7	7			4		3	9	2	6		Step 15: #1 is in Columns H & I: #1 MUST go in Cell G6
8				9	7	6		1			#1 in Row 5 @ D5 excludes use of Cell G5)
9	6	9	8	5
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 16: Complete Column D: need #s 2 & 8…
2	9	1	7	3	5	8		6			#8 can't go in Cell D4 (cf #8 in Row 4 @ H4), so
3	8			6	4	2	7	9	1		#8 MUST go in Cell D6, & therefore #2 MUST go in Cell D4
4		7		2	3		6	8	9
5		8	9	1	6	4					Step 17: #2 is now in Columns D & F: #2 MUST go in Cell E9
6		6		8	9		1	3			(#2 in Row 7 @ H7 excludes use of Cell E7)
7	7			4		3	9	2	6
8				9	7	6		1
9	6	9	8	5	2
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 18: Complete Column E: #8 MUST go in Cell E7…
2	9	1	7	3	5	8		6
3	8			6	4	2	7	9	1		Step 19: Row 4 needs #4: #4 MUST go in Cell C4
4		7	4	2	3		6	8	9		(#4 in Column A @ A1 excludes use of Cell A4, &
5		8	9	1	6	4					#4 in Column F @ F5 excludes use of Cell F4)
6		6		8	9		1	3	4
7	7			4	8	3	9	2	6		Step 20: #4 is now in Rows 4 & 5: #4 MUST go in Cell I6...
8				9	7	6		1
9	6	9	8	5	2
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 21: #4 is in Columns A & C: #4 MUST go in Cell B8
2	9	1	7	3	5	8		6			(#4 in Row 7 @ D7 excludes use of Cell B7)
3	8			6	4	2	7	9	1
4		7	4	2	3		6	8	9		Step 22: Complete Block HH: #1 MUST go in Cell F9…
5		8	9	1	6	4
6		6		8	9		1	3	4		Step 23: #1 is now in Rows 8 & 9: #1 MUST go in Cell C7
7	7		1	4	8	3	9	2	6		(#1 in Column B @ B2 excludes use of Cell B7)
8		4		9	7	6		1
9	6	9	8	5	2	1
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 24: Complete Column B: need #s 3 & 5…
2	9	1	7	3	5	8		6			#3 can't go in Cell B7 (cf #3 in Row 7 @ F7), so
3	8	3	5	6	4	2	7	9	1		#3 MUST go in Cell B3, & therefore #5 MUST go in Cell B7
4		7	4	2	3		6	8	9
5		8	9	1	6	4					Step 25: Complete Row 3 (& Block AA):
6		6		8	9		1	3	4		#5 MUST go in Cell C3
7	7	5	1	4	8	3	9	2	6
8		4		9	7	6		1
9	6	9	8	5	2	1
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 26: Complete Column C: need #s 2 & 3…
2	9	1	7	3	5	8		6			#3 can't go in Cell C6 (cf #3 in Row 6 @ H6), so
3	8	3	5	6	4	2	7	9	1		#3 MUST go in Cell C8, & therefore #2 MUST go in Cell C6
4		7	4	2	3		6	8	9
5		8	9	1	6	4					Step 27: #2 is now in Columns B & C: #2 MUST go in Cell A8
6		6	2	8	9		1	3	4
7	7	5	1	4	8	3	9	2	6
8	2	4	3	9	7	6		1
9	6	9	8	5	2	1
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 28: Complete Row 4: need #s 1 & 5…
2	9	1	7	3	5	8		6			#1 can't go in Cell F6 (cf #1 in Column F @ F9), so
3	8	3	5	6	4	2	7	9	1		#1 can't go in Cell F6 (cf #1 in Column F @ F9), so
4	1	7	4	2	3	5	6	8	9
5		8	9	1	6	4					Step 29: Complete Column F: #7 MUST go in Cell F6…
6		6	2	8	9	7	1	3	4
7	7	5	1	4	8	3	9	2	6
8	2	4	3	9	7	6		1
9	6	9	8	5	2	1
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 30: Complete Column A: need #s 3 & 5…
2	9	1	7	3	5	8	4	6	2		#3 can't go in Cell A6 (cf #3 in Row 6 @ H6), so
3	8	3	5	6	4	2	7	9	1		#3 MUST go in Cell A5, & therefore #5 MUST go in Cell A6
4	1	7	4	2	3	5	6	8	9
5	3	8	9	1	6	4					Step 31: Complete Row 2: need #s 2 & 4…
6	5	6	2	8	9	7	1	3	4		#4 can't go in Cell I2 (cf #4 in Row 6 @ I6), so
7	7	5	1	4	8	3	9	2	6		#4 MUST go in Cell G2, & therefore #2 MUST go in Cell I2
8	2	4	3	9	7	6		1
9	6	9	8	5	2	1
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9					Step 32: #2 is in Columns H & I: #2 MUST go in Cell G5…
2	9	1	7	3	5	8	4	6	2
3	8	3	5	6	4	2	7	9	1		Step 33: #4 is in Rows G & I: #4 MUST go in Cell H9…
4	1	7	4	2	3	5	6	8	9
5	3	8	9	1	6	4	2
6	5	6	2	8	9	7	1	3	4
7	7	5	1	4	8	3	9	2	6
8	2	4	3	9	7	6		1
9	6	9	8	5	2	1		4
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9		5			Step 34: Complete Column H: need #s 5 & 7…
2	9	1	7	3	5	8	4	6	2		#7 can't go in Cell H1 (cd #7 in Row 1 @ D1), so
3	8	3	5	6	4	2	7	9	1		#7 MUST go in Cell H5, & therefore #5 MUST go in Cell H1
4	1	7	4	2	3	5	6	8	9
5	3	8	9	1	6	4	2	7	5		Step 35: Complete Block FF: #5 MUST go in Cell I5...
6	5	6	2	8	9	7	1	3	4
7	7	5	1	4	8	3	9	2	6		Step 36: #5 is now in Columns H & I: #5 MUST go in Cell G8
8	2	4	3	9	7	6	5	1			(cf #5 in Row 9 @ D9 excludes use of Cel G9)
9	6	9	8	5	2	1		4
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9	8	5			Step 37: Complete Column G: need #s 3 & 8…
2	9	1	7	3	5	8	4	6	2		#8 can't go in Cell G9 (cf #8 in Row 9 @ C9), so
3	8	3	5	6	4	2	7	9	1		#8 MUST go in Cell G1, & therefore #3 MUST go in Cell G9
4	1	7	4	2	3	5	6	8	9
5	3	8	9	1	6	4	2	7	5
6	5	6	2	8	9	7	1	3	4
7	7	5	1	4	8	3	9	2	6
8	2	4	3	9	7	6	5	1
9	6	9	8	5	2	1	3	4
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9	8	5	3		Step 38: Complete Block CC: #3 MUST go in Cell I1...
2	9	1	7	3	5	8	4	6	2
3	8	3	5	6	4	2	7	9	1		Step 39: Complete Block II (& Puzzle): need #s 7 & 8…
4	1	7	4	2	3	5	6	8	9		#7 can't go in Cell I8 (cf #7 in row 8 @ E8), so
5	3	8	9	1	6	4	2	7	5		#7 MUST go in Cell I9, & therefore #8 MUST go in Cell I8
6	5	6	2	8	9	7	1	3	4
7	7	5	1	4	8	3	9	2	6
8	2	4	3	9	7	6	5	1	8
9	6	9	8	5	2	1	3	4	7
	A	B	C	D	E	F	G	H	I
1	4	2	6	7	1	9	8	5	3	45	Final Proof:
2	9	1	7	3	5	8	4	6	2	45	- All Rows add up to 45;
3	8	3	5	6	4	2	7	9	1	45
4	1	7	4	2	3	5	6	8	9	45
5	3	8	9	1	6	4	2	7	5	45
6	5	6	2	8	9	7	1	3	4	45
7	7	5	1	4	8	3	9	2	6	45
8	2	4	3	9	7	6	5	1	8	45
9	6	9	8	5	2	1	3	4	7	45
	45	45	45	45	45	45	45	45	45		- All Columns add up to 45;
	45			45			45				- All 3x3 Blocks add up to 45…
	45			45			45
	45			45			45