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Vanhegan Extreme Nov 14

 
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sun Nov 14, 2010 3:48 pm    Post subject: Vanhegan Extreme Nov 14 Reply with quote
Another Vanhegan but the "Extreme" version.......

Code:

+-------+-------+-------+
| . . 6 | 8 . 2 | 1 . . |
| . 7 4 | 9 5 . | . 3 8 |
| 5 . 8 | . . . | . . 9 |
+-------+-------+-------+
| . 4 . | 5 8 . | . 2 . |
| 8 . 7 | 1 . 9 | 3 . . |
| . 5 . | . 3 . | . 8 . |
+-------+-------+-------+
| 4 . . | . . 8 | 5 . 7 |
| . 8 5 | . 6 . | 4 9 2 |
| . . 2 | 4 . 5 | 8 . 3 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

Here are two one step solutions, both using a similar technique.

Quote:
AUR(47)r13c58 internal SIS r1c8=5,r3c5=1; r5c5=2
(5)r1c8-(5=4)r1c9-r56c9=r5c8-(4=2)r5c5;
||
(1)r3c5-(1=2)r3c2-r5c2=(2)r5c5;

or

AUR(16)r79c28 external SIS r3c2=1,r5c2=6; r6c4,r7c5<>2
(1)r3c2-r3c56=r2c6-(1=37)r8c46-(3=2)r7c4;
||
(6)r5c2-(2)r5c2=(2)r5c5;

Ted
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sun Nov 14, 2010 4:24 pm    Post subject: Reply with quote
A number of ALS moves in here I think, here's a nice one-stepper...
Quote:
An xy-wing(14-2) using an ANP as the pivot ; (2=1)r3c2 - ANP(1=47)r13c5 - (4=2)r5c5 ; r5c2<>2
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sun Nov 14, 2010 7:50 pm    Post subject: Reply with quote
peterj wrote:
A number of ALS moves in here I think, here's a nice one-stepper...
Quote:
An xy-wing(14-2) using an ANP as the pivot ; (2=1)r3c2 - ANP(1=47)r13c5 - (4=2)r5c5 ; r5c2<>2


Very nice Exclamation

Ted
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