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April 25 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 684
Location: Dar es Salaam Tanzania

PostPosted: Sun Apr 24, 2011 11:15 pm    Post subject: April 25 VH Reply with quote

W-Wing 67(with two strong links). With SL 7 in row 5 removes the 6's in BOX 1 row 3 and with strong link 6 in col 7 removes the 7's in BOX 1 row 3 and r1c6 which solves it.
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George Woods



Joined: 28 Mar 2006
Posts: 234
Location: Dorset UK

PostPosted: Mon Apr 25, 2011 12:16 am    Post subject: Reply with quote

Yet another "solves the puzzle" target for these w-wing 67s are the 6s in row 2
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Marty R.



Joined: 12 Feb 2006
Posts: 5164
Location: Rochester, NY, USA

PostPosted: Mon Apr 25, 2011 1:25 am    Post subject: Reply with quote

George's W-Wing with the strong link on 6 in row 2 takes out the 7s from r3c23.

Or a Finned X-Wing in rows 35 takes out the 7s from r12c2.

The Type 4 UR (also a Type 2, but useless) takes out the 4s from r4c89.

Interestingly, I didn't notice a solution that uses the moves that are required for these puzzles, i.e., X-, XY- and XYZ-Wing, although I didn't look thoroughly.
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LloydB



Joined: 09 Jul 2007
Posts: 21
Location: Skagit Co., WA USA

PostPosted: Mon Apr 25, 2011 3:09 pm    Post subject: Reply with quote

This may be the "official" solution

XYZ 267 centered in r3c3 followed by a 467 XY wing centered in r3c7 followed by an X wing on 7 did it for me.

Don't know if all those steps are required.
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Marty R.



Joined: 12 Feb 2006
Posts: 5164
Location: Rochester, NY, USA

PostPosted: Mon Apr 25, 2011 3:36 pm    Post subject: Reply with quote

Lloyd, where was the X-Wing?
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LloydB



Joined: 09 Jul 2007
Posts: 21
Location: Skagit Co., WA USA

PostPosted: Mon Apr 25, 2011 3:41 pm    Post subject: Reply with quote

I believe the X wing was in rows 3 and 5
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eddieg



Joined: 12 Jan 2006
Posts: 47
Location: San Diego, CA USA

PostPosted: Mon Apr 25, 2011 4:24 pm    Post subject: Reply with quote

Another fun puzzle. Thanks all.
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Marty R.



Joined: 12 Feb 2006
Posts: 5164
Location: Rochester, NY, USA

PostPosted: Mon Apr 25, 2011 5:09 pm    Post subject: Reply with quote

LloydB wrote:
I believe the X wing was in rows 3 and 5

Rows 35 are where my Finned X-Wing was, but for the X-Wing, I haven't found a way to get rid of the 7 from r3c3.

Code:

+------------+-------------+-------------+
| 5 67   8   | 1   4   27  | 69  279 3   |
| 1 3467 367 | 259 679 257 | 8   247 47  |
| 9 2467 267 | 3   67  8   | 46  1   5   |
+------------+-------------+-------------+
| 6 1    357 | 259 8   245 | 349 479 479 |
| 8 79   4   | 6   79  3   | 2   5   1   |
| 2 379  357 | 59  1   457 | 349 6   8   |
+------------+-------------+-------------+
| 7 8    1   | 4   2   9   | 5   3   6   |
| 4 5    9   | 7   3   6   | 1   8   2   |
| 3 26   26  | 8   5   1   | 7   49  49  |
+------------+-------------+-------------+

Play this puzzle online at the Daily Sudoku site
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LloydB



Joined: 09 Jul 2007
Posts: 21
Location: Skagit Co., WA USA

PostPosted: Mon Apr 25, 2011 10:36 pm    Post subject: Reply with quote

Marty,

Your grid has quite a few basic moves to make but you can still see the 267 XYZ wing in cells r1c2, r3c3 and r9c3.

This will solve R9c1 and r9c2 as 2 and 6 resp.
That will make r3c3 2 as there are no other 2s in c3
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Marty R.



Joined: 12 Feb 2006
Posts: 5164
Location: Rochester, NY, USA

PostPosted: Tue Apr 26, 2011 12:02 am    Post subject: Reply with quote

OK, I see my big basics error, not seeing the locked 7s in box 6. That said, it seems that the XYZ-Wing and X-Wing will do it; the XY-Wing wasn't needed, at least when I played the rest of it online just now.

Thanks.
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Julian



Joined: 28 Jul 2010
Posts: 9
Location: Menlo, GA

PostPosted: Wed Apr 27, 2011 1:53 am    Post subject: Reply with quote

I thought a W-wing was a rectangle of a single digit. How can this puzzle have a W-wing on 67? Thanks
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Marty R.



Joined: 12 Feb 2006
Posts: 5164
Location: Rochester, NY, USA

PostPosted: Wed Apr 27, 2011 3:47 am    Post subject: Reply with quote

Julian wrote:
I thought a W-wing was a rectangle of a single digit. How can this puzzle have a W-wing on 67? Thanks

Maybe you're thinking of an X-Wing?

Look at the 67 cells in boxes 1 and 2. And look at the 6s in row 2. If the 6 ends up in box 1, then r1c2 must be = 7. If the 6 ends up in box 2, then r3c5 must be = 7. Thus, with one or the other having to be a 7, they act as pincers and no cell seeing both can contain 7.
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Ema Nymton



Joined: 17 Apr 2009
Posts: 87

PostPosted: Wed Apr 27, 2011 11:29 am    Post subject: Reply with quote

.


Code:

+------------+------------+-------------+
| 5 67*  8   | 1   4  27  | 69  279 3   |
| 1 3467 37  | 259 69 25  | 8   247 47  |
| 9 246  26  | 3   67 8   | 46  1   5   |
+------------+------------+-------------+
| 6 1    35  | 259 8  245 | 349 479 479 |
| 8 79   4   | 6   79 3   | 2   5   1   |
| 2 379  357 | 59  1  457 | 349 6   8   |
+------------+------------+-------------+
| 7 8    1   | 4   2  9   | 5   3   6   |
| 4 5    9   | 7   3  6   | 1   8   2   |
| 3 26   26  | 8   5  1   | 7   49  49  |
+------------+------------+-------------+


How does one clear the '7' from r1c2? What are the steps?

Ema Nymton
.
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Julian



Joined: 28 Jul 2010
Posts: 9
Location: Menlo, GA

PostPosted: Wed Apr 27, 2011 11:43 am    Post subject: Reply with quote

Thanks, Marty.
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keith



Joined: 19 Sep 2005
Posts: 3179
Location: near Detroit, Michigan, USA

PostPosted: Wed Apr 27, 2011 12:04 pm    Post subject: Reply with quote

Ema Nymton wrote:
.


Code:

+------------+------------+-------------+
| 5 67*  8   | 1   4  27  | 69  279 3   |
| 1 3467 37  | 259 69 25  | 8   247 47  |
| 9 246  26  | 3   67 8   | 46  1   5   |
+------------+------------+-------------+
| 6 1    35  | 259 8  245 | 349 479 479 |
| 8 79   4   | 6   79 3   | 2   5   1   |
| 2 379  357 | 59  1  457 | 349 6   8   |
+------------+------------+-------------+
| 7 8    1   | 4   2  9   | 5   3   6   |
| 4 5    9   | 7   3  6   | 1   8   2   |
| 3 26   26  | 8   5  1   | 7   49  49  |
+------------+------------+-------------+


How does one clear the '7' from r1c2? What are the steps?

Ema Nymton
.
Ema,

In your grid, solve 7 in R3. The puzzle is done.

If you really want to solve R1C2 first, use the skyscraper / kite on 7 in R5 and C6.

Keith
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Ema Nymton



Joined: 17 Apr 2009
Posts: 87

PostPosted: Wed Apr 27, 2011 1:23 pm    Post subject: Reply with quote

keith wrote:
Ema,

In your grid, solve 7 in R3. The puzzle is done.

If you really want to solve R1C2 first, use the skyscraper / kite on 7 in R5 and C6.

Keith


doh. Thank you. A case of being so close to the forest and not seeing the trees.

.
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