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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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 Posted: Tue Oct 25, 2016 9:29 am Post subject: Oct 25 VH |
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After basics: | Code: |
+---------------+--------------+-------+
| 46 1 3 | 7 26 24 | 8 9 5 |
| 7 2458 245 | 4589 4589 49 | 3 1 6 |
| 9 58 56 | 3 568 1 | 2 4 7 |
+---------------+--------------+-------+
| 3468 34 46 | 1 28 23 | 5 7 9 |
| 358 35 1 | 89 7 39 | 4 6 2 |
| 2 7 9 | 45 45 6 | 1 3 8 |
+---------------+--------------+-------+
| 34 9 8 | 6 34 5 | 7 2 1 |
| 45 6 245 | 24 1 7 | 9 8 3 |
| 1 23 7 | 29 239 8 | 6 5 4 |
+---------------+--------------+-------+
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Play this puzzle online at the Daily Sudoku site
Two Wings for me: | Quote: | | 46-5 XY-Wing pivot r1c1 then 23-4 XY-Wing pivot r9c2 |
I guess someone might find a one-step
though the 89-2 XY pivot r5c4 appears to do very little...
Hugh |
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JC Van Hay
Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
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| Posted: Tue Oct 25, 2016 10:23 am Post subject: |
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| Code: | +---------------------+----------------+---------+
| (46) 1 3 | 7 26 24 | 8 9 5 |
| 7 258(4) 245 | 4589 4589 49 | 3 1 6 |
| 9 58 5-6 | 3 568 1 | 2 4 7 |
+---------------------+----------------+---------+
| 348-6 3(4) (46) | 1 28 23 | 5 7 9 |
| 358 35 1 | 89 7 39 | 4 6 2 |
| 2 7 9 | 45 45 6 | 1 3 8 |
+---------------------+----------------+---------+
| 34 9 8 | 6 34 5 | 7 2 1 |
| 45 6 245 | 24 1 7 | 9 8 3 |
| 1 23 7 | 29 239 8 | 6 5 4 |
+---------------------+----------------+---------+
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W-Wing{(46)r1c1.r4c3, 4C2} -> -{6r3c3, 6r4c1}; stte |
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the_lock_man
Joined: 18 Dec 2012
Posts: 40
Location: Portsmarfff, UK
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| Posted: Tue Oct 25, 2016 11:11 am Post subject: Re: Oct 25 VH |
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| hughwill wrote: | After basics: | Code: |
+---------------+--------------+-------+
| 46 1 3 | 7 26 24 | 8 9 5 |
| 7 2458 245 | 4589 4589 49 | 3 1 6 |
| 9 58 56 | 3 568 1 | 2 4 7 |
+---------------+--------------+-------+
| 3468 34 46 | 1 28 23 | 5 7 9 |
| 358 35 1 | 89 7 39 | 4 6 2 |
| 2 7 9 | 45 45 6 | 1 3 8 |
+---------------+--------------+-------+
| 34 9 8 | 6 34 5 | 7 2 1 |
| 45 6 245 | 24 1 7 | 9 8 3 |
| 1 23 7 | 29 239 8 | 6 5 4 |
+---------------+--------------+-------+
|
the 89-2 XY pivot r5c4 appears to do very little...
Hugh |
All that does is remove the 2 from R9C5, which can be done by basics anyway - the 2 in C4 must be in rows 8 or 9, so there can't be a two in R9C5 |
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richfa
Joined: 14 Feb 2016
Posts: 12
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| Posted: Tue Oct 25, 2016 12:21 pm Post subject: Notation help |
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Where can I find help on the notation you are using to describe haow you are solving these puzzles:
Not sure how to read this:
W-Wing{(46)r1c1.r4c3, 4C2} -> -{6r3c3, 6r4c1}; stte
or how to write ways that I have used to solve. If someone can point me to a page, I would be glad to read up on it. Looked in the FAQ, but the notation I saw there doesn't match what's being used in this forum.
Thanks! |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Oct 25, 2016 12:52 pm Post subject: |
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| Quote: | Not sure how to read this:
W-Wing{(46)r1c1.r4c3, 4C2} -> -{6r3c3, 6r4c1}; stte |
That's his way of telling us that there's a W-Wing on 46 in r1c1 and r4c3 and they are connected by a strong link on 4 in c2. If r2c2 is 4 then r1c1 must be 6 and if r4c2 is 4 then r4c3 must be 6. Since either r1c1 or r4c3 is 6 then 6 can be eliminated from r3c3 and r4c1. That's not standard notation. It's his way of telling us without using the standard notation. |
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Rocky Mozell
Joined: 28 Jul 2010
Posts: 34
Location: Boston, MA
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| Posted: Tue Oct 25, 2016 3:35 pm Post subject: |
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| All I needed was the 46-5 xy wing. It eliminates 4 from r8c3 making r1c1 6. |
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richfa
Joined: 14 Feb 2016
Posts: 12
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| Posted: Wed Oct 26, 2016 7:03 pm Post subject: |
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| Marty R. wrote: | | That's not standard notation. It's his way of telling us without using the standard notation. |
Thanks Marty ... OK, I guess what I am asking is where can I learn the standard notation to start out with. I see "stte" at the end of a number of notations and am not sure what a number of other things mean. Is there a reference somewhere? Thanks! |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Wed Oct 26, 2016 9:57 pm Post subject: |
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| richfa wrote: | | Marty R. wrote: | | That's not standard notation. It's his way of telling us without using the standard notation. |
Thanks Marty ... OK, I guess what I am asking is where can I learn the standard notation to start out with. I see "stte" at the end of a number of notations and am not sure what a number of other things mean. Is there a reference somewhere? Thanks! |
The notation we are using in this forum is known as a The Eureka notation. It is a compact method to write Alternating Inference Chains.
You can find the explanation at http://www.sudopedia.org/index.php/Eureka |
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richfa
Joined: 14 Feb 2016
Posts: 12
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| Posted: Thu Oct 27, 2016 4:05 pm Post subject: |
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| Clement wrote: | | The notation we are using in this forum is known as a The Eureka notation. It is a compact method to write Alternating Inference Chains. |
Thanks Clement! |
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richfa
Joined: 14 Feb 2016
Posts: 12
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