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Tough Sudoku for 1/January/2012

                 
                 
                 
                 
                 
                 
                 
                 
                 

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

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Submitted by: Gath

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Looks like it could be Vdv's plane instruments.
01/Jan/12 12:34 AM
We got to sit in the cockpit of a 747 once. Talk about gauges there!
(That probably won't happen again!)
01/Jan/12 1:30 AM
site puzzle 8.5* level:

// SF(5)bfh.159
// xyc:(9)h6=(9-1)g6=(1-5)g3=h1 # -9h1
1. (249)h9g78=(138)dhi9-(1)d1=ab1-c23=c6-g6=(145')g347 # -1de3, -2g34
// ext. als-xz:(1=249)g678-(478=6)abe7-i7=i5 # -1i5
01/Jan/12 1:54 AM
8.9 mystery level (SE @ 4dK x 23K x 17FC) ack!
010000000300800120000007890000000700005009030200700000400080005023004006001600000
01/Jan/12 2:08 AM
8.5** (SE @ 19K x 4FC)
400000890007020000020900600003890500060703000000010004906100405800000009000009710
01/Jan/12 2:11 AM
8.5**
#0 SSTS, ahs-xz (5)a5=hs(45)ce5-(9)c5=c4 ; c4<>5
// hidden-ur(29)cg45 ; g5<>2
// assorted colouring(2) ; fhca4<>2, f2<>2, h2<>2
#1 (2=7)f3* - (7=3)b3 - a1=a7 - (3=45)e75 - *(745=362)ehg2 ; h3<>2
#2 (257=1)a465 - (1=82)ih5 - (2)c5=c1 ; a1<>2
#3 (1)a7=f7 - (4)f7=kite(4)f62,edb1 - (4=1)b6 ; a5<>1
01/Jan/12 3:17 AM
I used kraken instead of "memory chain" on 8.5**
- not sure what "hidden UR" means peterj.
1. KCell(235)a1 # -7f3, YW(38.2)h35.g2, -2g5
(2)a1-aur(29)cg45::a456=*g2-h3=f3
||
(3)a1-(3=7)b3
||
(5)a1-a45=c45-(15)c29=(1-7)b2=b3
2. (4)c5=(4-1)b6=(145')ace2 # -29c5
3. (1=4)b6-SS(4)c25.f26=(4-1)f7=a7 # -1a5
01/Jan/12 3:47 AM
Hidden-ur is specific ur pattern with one bivalue cell and an overlaid x-wing pattern. http://www.sudokuwiki.org/Hidden_Unique_Rectangles
No idea why it is called "hidden" - I suppose because the other cells can be loaded with as many spurious candidates as you care...
01/Jan/12 4:52 AM
You are correct Vici, it is a Jabiru Option 2 Instrument layout and Vdv is the only Sudoku member who has one - as far as I know.
01/Jan/12 5:38 AM
Well, I hope Steve flew into the new year in style, and you too Ian!
01/Jan/12 7:34 AM
Thanks Greg, it is now a memory.
01/Jan/12 8:20 AM
1. Unique possibilities to 23.
2. Whether g8=9;OR g8=2,g4=5=c7=f9,f7=9,d7=2,i7=3,i5=6;g6=1.UP81.
01/Jan/12 9:08 AM
8.9 mystery is * level:

1. [(1=679)bch3-(9)d3=d9-(9=*8)a9-a2=(8-1)h2=h3] = (7)a9-c89=c3
# -7h3, UP81
01/Jan/12 1:40 PM
Yowza! I am sooo there....
01/Jan/12 6:29 PM
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