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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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 Posted: Thu Sep 01, 2011 11:20 pm Post subject: Sep 2 VH |
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Type 4 UR 78 setting r13c2<>8 reveals an
XYZ-Wing 248 with apex in r1c3; r1c2<>4 solves it. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Sep 02, 2011 3:51 am Post subject: |
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| I also didn't find a solution using just the standard VH moves. I played an XYZ wing (478), X-Wing (7), followed by a Type 1 UR on 78. |
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roaa
Joined: 18 Apr 2009
Posts: 112
Location: Sweden
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| Posted: Fri Sep 02, 2011 1:16 pm Post subject: |
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| The xyz-wing 478 was all I needed. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Sep 02, 2011 3:37 pm Post subject: |
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| roaa wrote: | | The xyz-wing 478 was all I needed. |
I'm jealous!! I noticed the Wing but didn't carry it through.  |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Fri Sep 02, 2011 4:32 pm Post subject: Sep 2 VH |
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roaa,Marty,
I am still at a loss. The xyz-wing 478 with apex in r1c2 (if it is the one you are refering to) sets r1c3<>8 leading to the Type 1 UR 78. I do not see how other eliminations ca be made wihout using it. Can you show the Grid after the basic moves so that I can easily follow? |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Sep 02, 2011 4:49 pm Post subject: |
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Clement, this is my post-basics grid. I first played with pencil and paper, but I successfully completed the puzzle online just with the XYZ-Wing.
| Code: |
+--------------+----------------+---------+
| 9 478 248 | 6 247 3 | 78 1 5 |
| 6 1 48 | 4578 457 458 | 9 2 3 |
| 357 578 238 | 9 1 28 | 78 6 4 |
+--------------+----------------+---------+
| 47 3 6 | 1 457 45 | 2 9 8 |
| 1 9 5 | 2 8 6 | 3 4 7 |
| 8 2 47 | 47 3 9 | 16 5 16 |
+--------------+----------------+---------+
| 2 458 1489 | 458 4569 7 | 45 3 16 |
| 345 458 1348 | 458 2456 2458 | 16 7 9 |
| 457 6 479 | 3 459 1 | 45 8 2 |
+--------------+----------------+---------+
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Play this puzzle online at the Daily Sudoku site |
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Stanley P
Joined: 27 Feb 2008
Posts: 20
Location: Tennessee, USA
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| Posted: Fri Sep 02, 2011 7:36 pm Post subject: sep 2 VH |
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| I'm getting to this a little late today, and used 2 x-wings, the last eliminating the 7 at R1C5, which set up the 248 xyz. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Fri Sep 02, 2011 9:29 pm Post subject: |
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After basics: | Code: | +----------------+----------------+----------------+
| 9 478 248 | 6 24 3 | 78 1 5 |
| 6 1 48 | 4578 457 458 | 9 2 3 |
| 35 578 238 | 9 1 28 | 78 6 4 |
+----------------+----------------+----------------+
| 47 3 6 | 1 457 45 | 2 9 8 |
| 1 9 5 | 2 8 6 | 3 4 7 |
| 8 2 47 | 47 3 9 | 16 5 16 |
+----------------+----------------+----------------+
| 2 458 1489 | 458 4569 7 | 1456 3 16 |
| 345 458 1348 | 458 2456 2458 | 1456 7 9 |
| 457 6 479 | 3 459 1 | 45 8 2 |
+----------------+----------------+----------------+ |
There are two XYZ-wings in R1B1: 47-8 and 2-48.
They do essentially the same thing. Each is a one-stepper.
Keith |
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