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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Tue Jul 28, 2009 1:47 am Post subject: July 28 VH |
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A week's wait brings a VH with a variety of one-step solutions.
Solutions: 145 xyz-wing eliminates 5 in R1C7; or coloring eliminates the 1 in R1C5; or 145 xy-wing elminates 1 in R1C5.
Early Earl
Last edited by Earl on Wed Jul 29, 2009 2:37 am; edited 1 time in total |
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crunched
Joined: 05 Feb 2008
Posts: 168
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| Posted: Tue Jul 28, 2009 3:14 am Post subject: Re: July 28 VH |
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| Earl wrote: | | A week's wait brings a VH with a variety of one-step solutions. Early Earl |
There is an xy wing in boxes 1 & 2. I found it first, and then found the xyz wing that Earl references. Hence I thought this was a 2-step puzzle. Perhaps the xy wing was unnecessary if the xyz wing is used.
On further inspection, the xy wing in boxes 1 & 2, opens up another xy wing in boxes 1 & 2, and that leads to a solution where Earl's xyz wing becomes unnecessary.
| Code: |
+----------+------------+---------------+
| 2 9 14 | 7 16 45 | 1456 8 3 |
| 145 7 8 | 15 136 345 | 2 9 1456 |
| 145 3 6 | 8 2 9 | 145 15 7 |
+----------+------------+---------------+
| 6 4 13 | 9 8 35 | 7 125 125 |
| 13 5 7 | 6 13 2 | 8 4 9 |
| 8 2 9 | 15 4 7 | 156 3 156 |
+----------+------------+---------------+
| 9 6 2 | 4 5 1 | 3 7 8 |
| 34 8 5 | 23 7 6 | 9 12 124 |
| 7 1 34 | 23 9 8 | 45 6 245 |
+----------+------------+---------------+
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Play this puzzle online at the Daily Sudoku site |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Jul 28, 2009 12:24 pm Post subject: |
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One step for me: | Quote: | | a kite 1(same as Earls coloring) |
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Big Bill
Joined: 30 May 2007
Posts: 5
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| Posted: Tue Jul 28, 2009 3:32 pm Post subject: |
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It was a one step xy wing for me in Block 1 and 2.
The 14-45-15 xy wing removes the 1 from R1C5 and R2C1. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Tue Jul 28, 2009 6:56 pm Post subject: |
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| A skyscraper on 4 (R3,R8) leads to the puzzle's demise. |
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Wendy W
Joined: 04 Feb 2008
Posts: 144
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| Posted: Tue Jul 28, 2009 11:34 pm Post subject: |
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 XYZ wing. 2 EZ! |
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crunched
Joined: 05 Feb 2008
Posts: 168
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| Posted: Wed Jul 29, 2009 1:53 am Post subject: |
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YES. A 'scraper does it. Nice find. The 'scraper causes the c7r9 cell to be 5, and on it goes.
| cgordon wrote: | A skyscraper on 4 (R3,R leads to the puzzle's demise. |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Thu Jul 30, 2009 7:11 pm Post subject: |
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| Code: | .------------------.------------------.------------------.
| 2 9 *14 | 7 16 *45 |14-56 8 3 |
| 145 7 8 | 15 136 345 | 2 9 1456 |
| 145 3 6 | 8 2 9 | 145 15 7 |
:------------------+------------------+------------------:
| 6 4 13 | 9 8 35 | 7 125 125 |
| 13 5 7 | 6 13 2 | 8 4 9 |
| 8 2 9 | 15 4 7 | 156 3 156 |
:------------------+------------------+------------------:
| 9 6 2 | 4 5 1 | 3 7 8 |
| 34 8 5 | 23 7 6 | 9 12 124 |
| 7 1 *34 | 23 9 8 |*45 6 245 |
'------------------'------------------'------------------' |
kind of in conjuction with the many ways to color 4, and since it wasn't mentioned yet, the w-wing {45} eliminates 5 from r1c7
(5=4)r1c6 - (4)r1c3 = (4)r9c3 - (4=5)r9c7; r1c7 <> 5 |
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