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Tough Sudoku for 27/November/2014


Choose a number, and place it in the grid above.

  1 2 3 4 5 6 7 8 9
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Sudoku Solving Techniques

Submitted by: sudoku lover

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On holiday?
27/Nov/14 12:43 AM
SE=7.1 UP to 35
1)ALS-XZ:(4=5)f2-(4=569)f4g46 => f5<>5 UP=42
2)S-Wing:(7=1)b2-b6=(7)i6 or (1)b2-h2=(1)h6 => i6<>1 UP=81
27/Nov/14 1:00 AM
On walkabout the easy way?
27/Nov/14 3:15 AM
#25 78@hi3=>a3<>78 5@a45=>a3<>5
#36 1?@f8=>d6=1=>d2=4=>f2=4=>f5={}=>f8<>1
#38 8@hi3=>i12<>8 46@hi9=>i9<>8 9@hi5=>g4<>9
#43 More...
27/Nov/14 7:33 AM
Hi Bud.
Is that S-wing needed?
#43 6@ef8=>h8<>6
Cheers Les
27/Nov/14 7:36 AM
Hi Les.
I'm not sure what you mean. I think you could replace the S-Wing with 2 forcing chains and possibly other moves. Regards Bud.
27/Nov/14 8:18 AM
Standard techniques UP 35
1. (4)d6=d2-(4=5)f2-(5=1)f5 =>d6<>1 UP 42
2. (1)i1=(1-7)a1=b2-(7=269)bce6-(2)h6=h5-(2=8)b5-i5=(8-7)i3=(7)i6 =>i6<>1 UP 81
27/Nov/14 9:41 AM
Basically, same as Bud's, in Eureka
27/Nov/14 9:43 AM
Sorry Bud.
I assumed your grid at #43 would be the same as mine. I can't see how you got passed #38 however.
Cheers Les.
27/Nov/14 10:34 AM
Hi Les. Note hi9=46.After f5=1,a5=5,hi5=9,g789=19,g38=78,g4=4,and UP42.

Best Regards, Alfred.
27/Nov/14 11:55 AM
Trailers HO!
27/Nov/14 12:34 PM
Thanks Alfred.
I managed to get passed #38 using hi9=46 too. But I can't see how Bud did from f5<>5.
Cheers Les
27/Nov/14 4:22 PM
Hi again Les. At UP35,hi9=46 already, because ef8=6,b8=4, and g15=46.

Best Regards, Alfred.
27/Nov/14 6:52 PM
Getting away from it all!
28/Nov/14 12:04 AM
Circle those wagons... Night is falling.
28/Nov/14 10:44 PM
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