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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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 Posted: Sun Feb 24, 2013 10:57 am Post subject: 24th Feb VH |
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Tedious basics- sorry if they're not finished:
| Code: |
+--------------+-------------+-----------------+
| 3 159 47 | 8 2 15 | 4579 567 15679 |
| 24 159 8 | 7 15 6 | 24 3 159 |
| 27 15 6 | 3 4 9 | 257 578 1578 |
+--------------+-------------+-----------------+
| 6 4 359 | 29 579 25 | 8 1 357 |
| 589 2 359 | 6 1579 158 | 57 4 357 |
| 58 7 1 | 4 35 358 | 6 9 2 |
+--------------+-------------+-----------------+
| 459 6 2459 | 1 8 7 | 3 25 59 |
| 79 38 279 | 5 39 4 | 1 2678 6789 |
| 1 38 579 | 29 6 23 | 579 578 4 |
+--------------+-------------+-----------------+
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Play this puzzle online at the Daily Sudoku site
One stepper:
Have recent VHs been a bit uninteresting, or is it just me?
Hugh |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Mon Feb 25, 2013 1:47 am Post subject: |
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Hugh,
I do not believe you have become less interesting, so it must be the puzzles.
Keith  |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Feb 25, 2013 2:32 am Post subject: |
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Well, Keith's in fine form today. 
As to the puzzles, I can't compare recent to not so recent, but an XY one-stepper is a commonly seen solution. |
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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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| Posted: Mon Feb 25, 2013 10:37 am Post subject: |
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| keith wrote: | Hugh,
I do not believe you have become less interesting, so it must be the puzzles.
Keith |
You're too kind Keith...... |
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the_lock_man
Joined: 18 Dec 2012
Posts: 40
Location: Portsmarfff, UK
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| Posted: Mon Feb 25, 2013 12:45 pm Post subject: Re: 24th Feb VH |
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| hughwill wrote: |
Have recent VHs been a bit uninteresting, or is it just me?
Hugh |
Perhaps you are just becoming better at spotting them? |
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jay
Joined: 19 Feb 2013
Posts: 10
Location: Grove, Oklahoma
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| Posted: Mon Feb 25, 2013 6:37 pm Post subject: 2-24-13 |
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| Code: |
+---------------+---------------+-----------------+
| 3 159 47 | 8 2 15 | 4579 567 15679 |
| 24 159 8 | 7 15 6 | 24 3 159 |
| 27 15 6 | 3 4 9 | 257 2578 1578 |
+---------------+---------------+-----------------+
| 6 4 359 | 29 3579 235 | 8 1 357 |
| 589 2 359 | 6 13579 1358 | 57 4 357 |
| 58 7 1 | 4 35 358 | 6 9 2 |
+---------------+---------------+-----------------+
| 2459 6 2459 | 1 8 7 | 3 25 59 |
| 279 38 279 | 5 39 4 | 1 2678 6789 |
| 1 38 2579 | 29 6 23 | 2579 2578 4 |
+---------------+---------------+-----------------+
|
Play this puzzle online at the Daily Sudoku site
I found this one hard to do. An xyz (235) wing helped, but then I had to find and use another wing to finish. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Feb 25, 2013 10:31 pm Post subject: Re: 2-24-13 |
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| jay wrote: | | Code: |
+---------------+---------------+-----------------+
| 3 159 47 | 8 2 15 | 4579 567 15679 |
| 24 159 8 | 7 15 6 | 24 3 159 |
| 27 15 6 | 3 4 9 | 257 2578 1578 |
+---------------+---------------+-----------------+
| 6 4 359 | 29 3579 235 | 8 1 357 |
| 589 2 359 | 6 13579 1358 | 57 4 357 |
| 58 7 1 | 4 35 358 | 6 9 2 |
+---------------+---------------+-----------------+
| 2459 6 2459 | 1 8 7 | 3 25 59 |
| 279 38 279 | 5 39 4 | 1 2678 6789 |
| 1 38 2579 | 29 6 23 | 2579 2578 4 |
+---------------+---------------+-----------------+
|
Play this puzzle online at the Daily Sudoku site
I found this one hard to do. An xyz (235) wing helped, but then I had to find and use another wing to finish. |
Jay,
I didn't look carefully at the entire grid, but take a very close look at row 6. |
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jay
Joined: 19 Feb 2013
Posts: 10
Location: Grove, Oklahoma
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| Posted: Tue Feb 26, 2013 2:23 am Post subject: Re: 2-24-13 |
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| Marty R. wrote: | | jay wrote: | | Code: |
+---------------+---------------+-----------------+
| 3 159 47 | 8 2 15 | 4579 567 15679 |
| 24 159 8 | 7 15 6 | 24 3 159 |
| 27 15 6 | 3 4 9 | 257 2578 1578 |
+---------------+---------------+-----------------+
| 6 4 359 | 29 3579 235 | 8 1 357 |
| 589 2 359 | 6 13579 1358 | 57 4 357 |
| 58 7 1 | 4 35 358 | 6 9 2 |
+---------------+---------------+-----------------+
| 2459 6 2459 | 1 8 7 | 3 25 59 |
| 279 38 279 | 5 39* 4 | 1 2678 6789 |
| 1 38 2579 | 29 6 23 | 2579 2578 4 |
+---------------+---------------+-----------------+
|
Play this puzzle online at the Daily Sudoku site
I found this one hard to do. An xyz (235) wing helped, but then I had to find and use another wing to finish. |
Jay,
I didn't look carefully at the entire grid, but take a very close look at row 6. |
____________________________________________
Marty, I am not exactly sure what you see in row 6. However, it does contain 35 which is part of the 23-235-35 xyz wing that I found, pinching off the 3 from *39 in box 8. This allowed me to pare it down to the grid below. There I found another xyz wing in 35-357-57, pinching off the 5s (from *589 & *359) in row 5, box 4.
| Code: |
+---------------+-----------+-----------------+
| 3 159 4579 | 8 2 15 | 4579 567 15679 |
| 2459 159 8 | 7 15 6 | 2459 3 159 |
| 257 15 6 | 3 4 9 | 257 2578 1578 |
+---------------+-----------+-----------------+
| 6 4 35 | 9 57 2 | 8 1 357 |
| 589* 2 359* | 6 157 158 | 57 4 357 |
| 58 7 1 | 4 3 58 | 6 9 2 |
+---------------+-----------+-----------------+
| 2459 6 2459 | 1 8 7 | 3 25 59 |
| 27 3 27 | 5 9 4 | 1 68 68 |
| 1 8 579 | 2 6 3 | 579 57 4 |
+---------------+-----------+-----------------+
|
Play this puzzle online at the Daily Sudoku site |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Tue Feb 26, 2013 2:47 am Post subject: |
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Jay,
After basics (from your grid)
| Code: | +-------------------+-------------------+-------------------+
| 3 159 47 | 8 2 15 | 4579 567 15679 |
| 24 159 8 | 7 15 6 | 24 3 159 |
| 27 15 6 | 3 4 9 | 257 578 1578 |
+-------------------+-------------------+-------------------+
| 6 4 359 | 29 579 25 | 8 1 357 |
| 589 2 359 | 6 1579 158 | 57 4 357 |
| 58 7 1 | 4 35 358 | 6 9 2 |
+-------------------+-------------------+-------------------+
| 459 6 2459 | 1 8 7 | 3 25 59 |
| 79 38 279 | 5 39 4 | 1 2678 6789 |
| 1 38 579 | 29 6 23 | 579 578 4 |
+-------------------+-------------------+-------------------+ |
An XY-wing solves it.
Keith |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Feb 26, 2013 4:54 am Post subject: |
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| Quote: | | Marty, I am not exactly sure what you see in row 6. |
Jay,
In that original grid the only place for a 3 in row 6 is in box 5. Therefore, no other rows in that box could contain a 3. I'm not sure if you're familiar with the terminology, but that's known as "Locked Candidates", as in the 3s in row 6 are locked in box 5. Some folks also call that Box-Line Interaction. |
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jay
Joined: 19 Feb 2013
Posts: 10
Location: Grove, Oklahoma
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| Posted: Thu Feb 28, 2013 3:00 am Post subject: |
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| Marty R. wrote: | | Quote: | | Marty, I am not exactly sure what you see in row 6. |
Jay,
In that original grid the only place for a 3 in row 6 is in box 5. Therefore, no other rows in that box could contain a 3. I'm not sure if you're familiar with the terminology, but that's known as "Locked Candidates", as in the 3s in row 6 are locked in box 5. Some folks also call that Box-Line Interaction. |
Aha! Yes, I am familiar with the technique---though not the terminology. I should have seen it (especially after you gave a big clue), but I obviously had my blinders on. Thanks |
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RobertRattley
Joined: 24 Jun 2007
Posts: 118
Location: Australia
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| Posted: Sat Mar 02, 2013 7:25 am Post subject: |
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Well, dear friends, I find every puzzle interesting, even the medium and easy ones. But I'm strange.
One thing I liked about this puzzle was that "basics" for me needed a "hard" step. Not very hard, perhaps, but "hard". The pair 38 in column 2.
Even so, with the same basics as spotted in the above postings, it took me an inexplicably long time to spot the 235 xy wing. Hmm. Maybe it is I, with my fluctuating acuity, that am interesting, not the puzzles. |
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