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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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 Posted: Fri Oct 19, 2012 6:23 am Post subject: Menneske 6066265 |
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| Code: |
*-----------*
|.1.|...|.4.|
|9..|15.|..3|
|..8|..3|9..|
|---+---+---|
|.9.|3..|.26|
|...|...|...|
|25.|..4|.9.|
|---+---+---|
|..9|8..|2..|
|7..|.96|..5|
|.2.|...|.3.|
*-----------*
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Oct 19, 2012 9:12 am Post subject: |
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Code after basics:
| Code: | *-----------------------------------------------------------------------------*
| 356 1 2356 | 679 2678 2789 | 5678 4 278 |
| 9 467 246 | 1 5 278 | 678 678 3 |
| 56 67 8 | 467 2467 3 | 9 1567 127 |
|-------------------------+-------------------------+-------------------------|
| 148 9 147 | 3 178 1578 | 14578 2 6 |
| 13468 38 13467 | 5679 12678 125789 | 134578 1578 1478 |
| 2 5 1367 | 67 1678 4 | 1378 9 178 |
|-------------------------+-------------------------+-------------------------|
| 1456 46 9 | 8 3 157 | 2 167 147 |
| 7 38 134 | 2 9 6 | 148 18 5 |
| 1568 2 156 | 457 147 157 | 1678 3 9 |
*-----------------------------------------------------------------------------*
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The deletion can be expressed in several ways. I initially viewed it as an "up/down" skyscraper(5)r5c48 with transport.
Chain(5): r3c8=r5c8-r5c4=r9c4-r9c13=r7c1-r13c1=r1c3 => -5r1c7
Ted |
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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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| Posted: Fri Oct 19, 2012 2:38 pm Post subject: Menneske 6066265 |
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| Code: |
+-----------------+-------------------+------------------+
| 356 1 23567 | 679 2678 2789 | 5678 4 278 |
| 9 467 2467 | 1 5 278 | 678 678 3 |
| -56 67 8 | 467 2467 3 | 9 1567 127 |
+-----------------+-------------------+------------------+
| 148 9 147 | 3 178 1*578 | 14578 2 6 |
| 13468 38 13467 | 5679 12678 125789 | 134578 1578 1478 |
| 2 5 1367 | 67 1678 4 | 1378 9 178 |
+-----------------+-------------------+------------------+
| 1456 46 9 | 8 3 157 | 2 167 147 |
| 7 38 134 | 2 9 6 | 148 18 5 |
| 1568 2 156 | 457 147 157 | 1678 3 9 |
+-----------------+-------------------+------------------+
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Digit Forcing Chain
5r4c6-5r79c6=5r9c4-5r9c1=5r7c1; r3c1<>5
-5r4c6=5r4c7-5r1c7=5r1c13; r3c1<>5 solves it. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Fri Oct 19, 2012 2:45 pm Post subject: Re: Menneske 6066265 |
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| Clement wrote: | Digit Forcing Chain
5r4c6-5r79c6=5r9c4-5r9c1=5r7c1; r3c1<>5
-5r4c6=5r4c7-5r1c7=5r1c13; r3c1<>5 solves it. |
or
| Code: |
*-----------------------------------------------------------------------------*
|*356 1 f2356 | 679 2678 2789 |*5678 4 278 |
| 9 467 246 | 1 5 278 | 678 678 3 |
| 6-5 67 8 | 467 2467 3 | 9 1567 127 |
|-------------------------+-------------------------+-------------------------|
| 148 9 147 | 3 178 *1578 |*14578 2 6 |
| 13468 38 13467 | 5679 12678 125789 | 134578 1578 1478 |
| 2 5 1367 | 67 1678 4 | 1378 9 178 |
|-------------------------+-------------------------+-------------------------|
|*1456 46 9 | 8 3 *157 | 2 167 147 |
| 7 38 134 | 2 9 6 | 148 18 5 |
| 1568 2 156 | 457 147 157 | 1678 3 9 |
*-----------------------------------------------------------------------------*
finned swordfish 5r147c167, fr1c3 => -5r3c1
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Oct 19, 2012 3:00 pm Post subject: |
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Hi Clement,
Your solution is good; one of several variations possible on 5s.
Your posting is complete and clear. An alternate method of presenting your solution is a single statement. One possibility would be to start with your second statement and walk it backwards and ending with your first statement.
Chain 5: r1c13=r1c7-r4c7=r4c6-r79c6=r9c4-r9c13=r7c1 => -5r3c1
This Eureka notation starts by stating either r1c13=5 or r1c7=5, and then proceeds to specify a logic path given r1c7=5. Note that the first and last statements act like pincers on 5; either r1c13=5 or r7c1=5.
Please ignore this input if it is not useful or desired. I am available to answer any questions you may have.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Oct 19, 2012 4:46 pm Post subject: |
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| Code: | *--------------------------------------------------------------------------------*
| 356 1 2356 | 679 2678 2789 | 5678 4 278 |
| 9 467 246 | 1 5 278 | 678 678 3 |
| A56 67 8 | 467 2467 3 | 9 B1567 127 |
|--------------------------+---------------------------+-------------------------|
| 148 9 147 | 3 178 E1578 | 14578 2 6 |
| 13468 38 13467 | F5679 12678 E125789 | 134578 1-578 1478 |
| 2 5 1367 | 67 1678 4 | 1378 9 178 |
|--------------------------+---------------------------+-------------------------|
| C1456 46 9 | 8 3 D157 | 2 167 147 |
| 7 38 134 | 2 9 6 | 148 18 5 |
| 1568 2 156 | 457 147 157 | 1678 3 9 |
*--------------------------------------------------------------------------------* |
Obviously 5 is the key here. My variation is the Skyscraper ABCD with transport of D to F via E; r5c8<>5. |
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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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| Posted: Fri Oct 19, 2012 6:36 pm Post subject: |
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tlanglet
Yes, I can see, your notation and approach is shorter and clear. Thanks. Where can I get more details of the Eureka Notation? |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Oct 20, 2012 12:32 pm Post subject: |
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| Clement wrote: | tlanglet
Yes, I can see, your notation and approach is shorter and clear. Thanks. Where can I get more details of the Eureka Notation? |
Clement,
I used some information from Sudopedia, but that site seems to have been "trashed" and all information lost. Mostly I learned by reviewing posts by others. The notation is rather easy to follow for xy-chains and other simple logic. I suggest that you search the web for both "sudoku eureka notation" and "sudoku AIC notation".
The Eureka notation is not a frozen standard and is still evolving specifically in handling complex components like AURs, basic patterns and ALSs.
The two rules to remember are
1) start and end with a strong link
2) alternate strong link => weak link => strong link, etc.
I will attempt to answer any specific questions. Others on this site with much greater knowledge will also help.
Ted |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Oct 27, 2012 8:06 pm Post subject: |
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Thank you very much......  |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Oct 28, 2012 1:14 am Post subject: |
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| tlanglet wrote: |
Thank you very much...... |
Not a problem. After Sudopedia first went offline and came back, I made a copy of the site. Now, the site is completely trashed.
I have my copy, and it works fine, but I have not been able to share it with anyone else.
I can, however, copy and post particular Sudopedia articles on this site. Just ask.
Keith
Last edited by keith on Tue Nov 20, 2012 10:40 pm; edited 1 time in total |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Oct 28, 2012 1:45 am Post subject: |
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| Quote: | The Eureka notation is not a frozen standard and is still evolving specifically in handling complex components like AURs, basic patterns and ALSs.
The two rules to remember are
1) start and end with a strong link
2) alternate strong link => weak link => strong link, etc.
I will attempt to answer any specific questions. Others on this site with much greater knowledge will also help. |
Ted, you are Professor of Eureka at Sudoku University.  |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Oct 28, 2012 2:41 am Post subject: |
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Kind words Marty .
A gross exaggeration at best but I think you have been into the Scotch.
Ted |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue Nov 20, 2012 4:55 am Post subject: |
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| keith wrote: | | tlanglet wrote: |
Thank you very much...... |
Not a problem. After Sudopedia first went offline and came back, I made a copy of the site. Now, the site is completely trashed.
I have my copy, and it works fine, but I have not been able to share it with anyone else.
I can, however, copy and post particular Sudopedia articles on this site. Just ask.
Keith |
Hi Keith,
I would appreciate your assistance to determine the Sudopedia name for the pattern I posted here, Is it called a Kraken x-wing, a fin transport x-wing or still some other name.
Appreciate ............
Ted |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Wed Nov 21, 2012 7:40 am Post subject: |
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| tlanglet wrote: | Hi Keith,
I would appreciate your assistance to determine the Sudopedia name for the pattern I posted here, Is it called a Kraken x-wing, a fin transport x-wing or still some other name.
Appreciate ............
Ted |
Done
http://www.dailysudoku.com/sudoku/forums/viewtopic.php?t=6739
Please add comments and examples.
Keith |
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