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Tough Sudoku for 19/September/2009

                 
                 
                 
                 
                 
                 
                 
                 
                 

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

  1 2 3 4 5 6 7 8 9
Check out the latest post in the Sudoku Forum

Sudoku Solving Techniques

Submitted by: sudoku lover

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With the mask, like raccoons, they always look like they're up to mischief!
19/Sep/09 12:14 AM
So THAT'S what a Kookaburra looks like! Are those gum trees behind?
19/Sep/09 12:25 AM
I'm Kookoo for Kookaburras!
19/Sep/09 1:06 AM
27:05 Maen! Kookaburras! There's probably a song in there somewhere...
19/Sep/09 1:44 AM
16:55 Just saw a kookaburra display at the zoo.
19/Sep/09 3:22 AM
Well said, Vici!
Have a great weekend, everyone.
19/Sep/09 5:19 AM
slow >1hr
19/Sep/09 6:35 AM
♪♫Kookaburra sits in the old gum tree,
Merry merry king of the bush is he.
Laugh, Kookaburra, laugh, Kookaburra,
Gay your life must be!♫♪
19/Sep/09 11:07 AM
Uhhhhhh Broni, think I'd prefer Vickis' rendition....LOL
19/Sep/09 11:38 AM
ralphmouth I only sing in the shower and the car!
19/Sep/09 11:52 AM
wonder what kind of sauce goes with fried Kookaburras ?

19/Sep/09 1:26 PM
Ahh here they come! The bandits of the picnic area. One of them is the thieving sod who stole my sausage and bread right out of my hand!
19/Sep/09 2:53 PM
1)Start at 23,basic techiques to UP=27
2)YWS:((7)d9=(7-3)d3=f2-(3=7)f4,=>f79<>7.UP=39
3)Loop:(1=4)a1-(4=8)g1-(8=5)g7-(5=1) a7,=>h1<>4,g26<>8,ci7<>5,a2<>1.
4)(1)i2=h1-a1=(1-5)a7=g7-g6=(5)i5,=>i More...
19/Sep/09 3:48 PM
Hi Sotir.At your step (6),I have h5=148;h6=489 on my grid.So I don't see how you can make use of the 48 AUR yet.Also,in the middle of step(6)....,=>h5&lt;>48.... seems to be a typo.
Regards,Alfred.
19/Sep/09 5:43 PM
A batch of nice puzzles. Sadly, my time is limited. I did look at September 17, and there is a nice XYZ ALS deduction in that one. Sotir, it is a decent example of an AALS type deduction centered on d7, since I recall you asking about AALS.
Cheers!
Steve
19/Sep/09 6:06 PM
Hi Alfred,
After step 5,=>e6=6,bg6=59,dh6=48.
Step 6:=>h5<>48.UP=48
Regards,Sotir.
19/Sep/09 9:48 PM
Thanks Steve for you solution September 17.
I have to study it.
Regards,Sotir
19/Sep/09 10:17 PM
Thanks Sotir.Forgot that 4s are locked at g12.
Alfred.
19/Sep/09 10:44 PM
29:54
20/Sep/09 11:36 PM

SE=7.2
10/Sep/10 7:01 AM
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