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kragzy
Joined: 01 May 2007
Posts: 112
Location: Australia
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 Posted: Thu Oct 15, 2009 10:21 pm Post subject: Oct 16 VH |
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For those who like a mathematical approach to single step solutions:
X2 = 1 |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Thu Oct 15, 2009 10:34 pm Post subject: Oct 16 VH |
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| XY-Wing -<78>-<47>-<48> eliminates 8 in r5c1 followed by an X-Wing in 2s Col 2 & Col 8 eliminating 2 in r1c3 solves the puzzle. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Fri Oct 16, 2009 6:48 am Post subject: Re: Oct 16 VH |
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| kragzy wrote: | For those who like a mathematical approach to single step solutions:
X2 = 1 |
Does that translate x-wing 2 = one step solution? |
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iiggoorr
Joined: 06 Aug 2009
Posts: 4
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| Posted: Fri Oct 16, 2009 9:00 am Post subject: |
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| 18-UR in rows 7-8 eliminate 18 in r8c9 and it solves the puzzle |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Oct 16, 2009 12:04 pm Post subject: |
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| iiggoorr wrote: | | 18-UR in rows 7-8 eliminate 18 in r8c9 and it solves the puzzle |
Hi iiggoorr,
The following is my code after basics:
| Code: |
*-----------------------------------------------------------*
| 1 24 23 | 9 38 5 | 6 248 7 |
| 246 5 236 | 7 138 18 | 48 9 248 |
| 7 8 9 | 4 6 2 | 3 1 5 |
|-------------------+-------------------+-------------------|
| 3 1 78 | 2 5 47 | 9 468 468 |
| 248 6 5 | 3 48 9 | 1 7 248 |
| 9 24 278 | 18 1478 6 | 5 248 3 |
|-------------------+-------------------+-------------------|
| 5 7 4 | 6 9 18 | 2 3 18 |
| 268 9 268 | 18 247 3 | 478 5 1468 |
| 268 3 1 | 5 247 47 | 478 468 9 |
*-----------------------------------------------------------* |
Given this code, I assume you are referring to the 18 pattern in box89 and row78. If so, that arrangement is not a valid UR pattern. To be valid, the four cells forming the UR must be in two rows, two columns and two boxes. (This forms a rectangle in two boxes.)
A good description of the UR is available at http://www.sudocue.net/guide.php#UR.
Ted |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Fri Oct 16, 2009 2:23 pm Post subject: |
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| Quote: | | Does that translate x-wing 2 = one step solution? |
Sounds like my one-stepper - x-wing on 2 which I used early on before finishing basics. No worries mate. |
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kragzy
Joined: 01 May 2007
Posts: 112
Location: Australia
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| Posted: Mon Oct 19, 2009 9:14 am Post subject: Re: Oct 16 VH |
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| arkietech wrote: | | kragzy wrote: | For those who like a mathematical approach to single step solutions:
X2 = 1 |
Does that translate x-wing 2 = one step solution? |
You got it! |
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