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Tough Sudoku for 31/January/2011


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

  1 2 3 4 5 6 7 8 9
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Submitted by: Gath

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And by the year 2210 it was filled in!
31/Jan/11 12:11 AM
This must be the fence you were referring to in another picture - but I couldn't pick it out. That's a LONG drop!
31/Jan/11 12:33 AM
1. Unique possibilities to 30.
2. If f4=5=d3;column c is devoid of 5.So f4=6.UP81.
31/Jan/11 12:43 AM
Baloney! He's throwing rocks in the water, just like every other kid!
31/Jan/11 1:05 AM

31/Jan/11 1:18 AM
Easy to UP=30
5 Skyscraper c34-d36 => a6,f4<>5 UP=81
31/Jan/11 1:30 AM
Alfred's move as a pattern...
skyscraper(5)[(5)d6=d3-c3=c4] => a6<>5, f4<>5
31/Jan/11 1:32 AM
or any of 3 finned sword fishes
31/Jan/11 1:45 AM
Hmmmmm..... I bet this was interesting!

Have a great day everyone!
31/Jan/11 6:03 AM
UK extreme has been not recently.
UK extreme #228 30 Jan, '11; SE rating 7.1
1. SST to UP=50.
2. (1=2)c1-(2=8)h1-g3=g8-(8=9)i8-i1=(89-1)a13=a8 => c8<>1; UP=61.
3. xy-wing (3=9)a8-(9=37)b48 => a4<>3; UP=81.
31/Jan/11 7:34 AM
UK extreme (agree disappointing)
1.SST to UP50
2.(1=2)c1-a2=(128')a138-(9)a1=i1 > -1i1, UP61, FXW(9)bg28, -9g7, UP81.
31/Jan/11 11:12 AM
the YW I saw at UP61: YW(793)b48a7 > -3a4
(step cost for YW higher than FXW when I do these; harder to spot because multi-digit?)
31/Jan/11 11:28 AM
(BTW - agree with Alfred that much overloaded '=' symbol in eureka syntax is in the end more confusing than helpful, hence for results just '>' and UPn etc., also <> seems ungainly and requires '=' again for positive results)
31/Jan/11 11:55 AM
I am all for condensing notation.
31/Jan/11 4:32 PM
While on the subject of notation:
AUR : Almost Unique Rectangle.
"Almost" makes sense,so does "Rectangle", but "Unique" ?? A much more accurate description would be Almost Unresolvable Rectangle.
31/Jan/11 4:53 PM
Very easy today - 8:20.
31/Jan/11 8:48 PM
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