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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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 Posted: Sat Nov 29, 2014 10:36 am Post subject: Nov 29 VH |
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This is where I got to with basics:
| Code: |
+---------------+----------+--------------+
| 18 9 47 | 3 2 5 | 147 478 6 |
| 3 156 257 | 4 8 16 | 9 257 17 |
| 1568 1456 245 | 16 7 9 | 1245 2458 3 |
+---------------+----------+--------------+
| 9 8 6 | 5 1 2 | 3 47 47 |
| 2 7 3 | 8 9 4 | 6 1 5 |
| 15 145 45 | 7 6 3 | 8 9 2 |
+---------------+----------+--------------+
| 4 256 9 | 126 3 7 | 125 256 8 |
| 56 3 1 | 26 4 8 | 257 2567 9 |
| 7 26 8 | 9 5 16 | 124 3 14 |
+---------------+----------+--------------+
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Play this puzzle online at the Daily Sudoku site
I did it, but it took me 2 X-wings, 2 XY-wing and loads of XYZ-wings.
Too many to list here - surely someone did it quicker using 'classic'
techniques?
If not this is the most complex we've seen for a while...
Hugh
Last edited by hughwill on Sat Nov 29, 2014 1:33 pm; edited 1 time in total |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Nov 29, 2014 12:41 pm Post subject: |
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| Code: | *-----------------------------------------------------------*
|b18 9 a47 | 3 2 5 |a147 a478 6 |
| 3 156 257 | 4 8 16 | 9 257 17 |
| 1568 1456 245 | 16 7 9 | 1245 2458 3 |
|-------------------+-------------------+-------------------|
| 9 8 6 | 5 1 2 | 3 47 47 |
| 2 7 3 | 8 9 4 | 6 1 5 |
|b15 145 45 | 7 6 3 | 8 9 2 |
|-------------------+-------------------+-------------------|
| 4 256 9 | 126 3 7 | 25-1 256 8 |
|b56 3 1 | 26 4 8 | 257 2567 9 |
| 7 c26 8 | 9 5 16 |c124 3 c14 |
*-----------------------------------------------------------*
(1=8)r1c378-(8=6)r168c1-(6=41)r9c279 => -1r7c7; ste |
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dongrave
Joined: 06 Mar 2014
Posts: 572
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| Posted: Sat Nov 29, 2014 3:24 pm Post subject: Re: Nov 29 VH |
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| hughwill wrote: | This is where I got to with basics:
| Code: |
+---------------+----------+--------------+
| 18 9 47 | 3 2 5 | 147 478 6 |
| 3 156 257 | 4 8 16 | 9 257 17 |
| 1568 1456 245 | 16 7 9 | 1245 2458 3 |
+---------------+----------+--------------+
| 9 8 6 | 5 1 2 | 3 47 47 |
| 2 7 3 | 8 9 4 | 6 1 5 |
| 15 145 45 | 7 6 3 | 8 9 2 |
+---------------+----------+--------------+
| 4 256 9 | 126 3 7 | 125 256 8 |
| 56 3 1 | 26 4 8 | 257 2567 9 |
| 7 26 8 | 9 5 16 | 124 3 14 |
+---------------+----------+--------------+
|
Play this puzzle online at the Daily Sudoku site
I did it, but it took me 2 X-wings, 2 XY-wing and loads of XYZ-wings.
Too many to list here - surely someone did it quicker using 'classic'
techniques?
If not this is the most complex we've seen for a while...
Hugh |
What the heck? I surely appreciate Dan's single step solution but since I know that all VH's on this site can be solved using just 'standard' VH moves (i.e. X, XY, and XYZ wings), I always look for that solution and like Hugh, I lost count! (I think it was something like 7 or 8!) Is there a simpler solution just using the standard VH moves? If so, I surely didn't see it! And if not, then I've only got one thing to say - Holy crow! |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Nov 29, 2014 10:24 pm Post subject: Re: Nov 29 VH |
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| dongrave wrote: |
What the heck? I surely appreciate Dan's single step solution but since I know that all VH's on this site can be solved using just 'standard' VH moves (i.e. X, XY, and XYZ wings), I always look for that solution and like Hugh, I lost count! (I think it was something like 7 or 8!) Is there a simpler solution just using the standard VH moves? If so, I surely didn't see it! And if not, then I've only got one thing to say - Holy crow! |
using only X, XY, and XYZ wings
I got:
XYZ-Wing 147r1c37,r2c9 => -7r1c8
X-Wing 1c69r29 => -1r2c2,r9c7
XY-Wing 184r1c18,r3c2 => -4r1c3,r3c78
X-Wing 6r29c26 => -6r7c2
XY-Wing 562r7c2,r8c14 => -2r7c4
XYZ-Wing 256r7c28,r8c8 => -5r7c7
XYZ-Wing 168r13c1,r3c4 => -1r3c2
Why limit your self? |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Nov 30, 2014 7:34 am Post subject: |
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Pretty amazing in that all seven steps seem to be required.
I usually do solve these puzzles using only the methods known to be required. One man's restriction is another man's challenge.
In the same way, I do not use pencil marks to solve other than this site's "Very Hard" puzzles.
Keith |
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JC Van Hay
Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
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| Posted: Sun Nov 30, 2014 10:18 am Post subject: |
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From the 2 solutions of C9 : r2c9=1 or 7 => r8c1=6; stte
A short interpretation :
| Code: | +--------------------+--------------+-----------------+
| (18) 9 47 | 3 2 5 | 47(1) 478 6 |
| 3 156 257 | 4 8 16 | 9 257 17 |
| 15-6(8) 1456 245 | (16) 7 9 | 1245 2458 3 |
+--------------------+--------------+-----------------+
| 9 8 6 | 5 1 2 | 3 47 47 |
| 2 7 3 | 8 9 4 | 6 1 5 |
| 15 145 45 | 7 6 3 | 8 9 2 |
+--------------------+--------------+-----------------+
| 4 256 9 | 26(1) 3 7 | 25(1) 256 8 |
| 56 3 1 | 26 4 8 | 257 2567 9 |
| 7 2 8 | 9 5 16 | 124 3 14 |
+--------------------+--------------+-----------------+
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[(6=1)r3c4-1r7c4=1r7c7-1r1c7=(1-8)r1c1=8r3c1]-6r3c1=6r8c1; stte |
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lucygp
Joined: 29 Dec 2014
Posts: 3
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| Posted: Mon Dec 29, 2014 8:02 am Post subject: |
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Is there a simpler solution just using the standard VH moves?
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