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Tough Sudoku for 8/January/2010

                 
                 
                 
                 
                 
                 
                 
                 
                 

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Submitted by: Gath

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A great double rainbow photo.
08/Jan/10 12:07 AM
Not much of Canada, but a WHOLE LOT of rainbow!
It must have been spectacular in person!
08/Jan/10 12:11 AM
Sommmmmme-where over the rainbows ...
08/Jan/10 2:17 AM
...blue birds fly...but probably not today as they have gone south for the winter!
08/Jan/10 3:04 AM
A stairway to the stars in Carstairs.
08/Jan/10 3:40 AM
28:09 Maen! Nice rainbows!
08/Jan/10 5:40 AM
maen all! plenty of refraction going on up there. puzzle wasn't too difficult once i got the center box squared away.
08/Jan/10 6:06 AM
1. Note Pairs 24 at ab4;18 at hi6;19 at a78.Unique possibilities to 25.
2. If i7=5,locked 3s at g79,i4=3.If h9=5,i4=5.Hence g4=7.UP26.
3. If e5=3,f5=2,d5=1,f7=5=h9=d4;right middle box is devoid of 5.So e9=3.UP28.
4. Whether d9 or h9=5,d4 and h5 are not 5.
5. If More...
08/Jan/10 6:32 AM

1)Start at 22,basic techniques to UP=26
2)FXW(5): h9=d9-d4=hi4,=>h6<>5.UP=28
3)(1=3)g7-i7=i4-(3=6)d4-(6=9)d8-(9=1)a8,=>a7<>1.UP=81
08/Jan/10 8:47 AM

Hi Alfred,
Step 2 is not necessary, hp(35)i47.UP=26
Regards,Sotir
08/Jan/10 9:13 AM
Hi Sotir.Usual question:What is UP26? Is it g4=7?
Also,when you show h5<>5 (not typo h6 BTW) in step 2,what are the extra 2 UPs?
I can see now that my steps 5 and 6 were unnecessary,but I still need step 2 to show g4=7 and step 3 to show e9=3.
It looks like your steps 2 and 3 are equivalent to my steps 4 and 7. Regards,Alfred.
08/Jan/10 10:05 AM
Thanks Sotir,didn't see your second posting.I missed the 35 pair.That explains g4=7,but what about the other question;after h5<>5,what are the extra 2 UPs?
Regards, Alfred.
08/Jan/10 10:16 AM

Hi Alfred,
2)=>e9=3,g9=6.UP=26
Sotir
08/Jan/10 10:33 AM
Sorry,
2)=>UP=28
08/Jan/10 10:37 AM
>> 1 hr
08/Jan/10 2:44 PM
Thanks again Sotir.Shows that 4 of my steps (2,3,5,6)are superfluous!
Alfred.
08/Jan/10 6:35 PM
Was that a Judy singing "Somewhere over the Rainbow"?
09/Jan/10 1:17 PM
24:07
10/Jan/10 9:56 AM
The caption should have read "Canada Day" and my photo does not do it justice at all!
16/Jan/10 2:11 AM

SE=7.3
10/Sep/10 10:44 AM
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