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Nov 2 VH

 
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hughwill



Joined: 05 Apr 2010
Posts: 422
Location: Birmingham UK

PostPosted: Wed Nov 02, 2016 11:01 am    Post subject: Nov 2 VH Reply with quote

After Basics:
Code:

+-----------+--------+-----------+
| 47  2  3  | 1 69 8 | 69 47  5  |
| 457 1  57 | 3 69 2 | 78 478 69 |
| 8   6  9  | 4 7  5 | 3  2   1  |
+-----------+--------+-----------+
| 9   37 6  | 2 5  4 | 1  37  8  |
| 237 4  27 | 6 8  1 | 79 5   39 |
| 1   5  8  | 9 3  7 | 2  6   4  |
+-----------+--------+-----------+
| 27  37 1  | 5 4  9 | 68 38  26 |
| 235 8  25 | 7 1  6 | 4  9   23 |
| 6   9  4  | 8 2  3 | 5  1   7  |
+-----------+--------+-----------+

Play this puzzle online at the Daily Sudoku site

It's back! I'll put a copy below in case it's not available in your time zone...

I couldn't do better than 2 moves
Quote:
X wing on 3 c28
followed by XY-Wing 25-7 pivot r8c3 :: r2c3=7 stte
(Select quote area to view...)

Today's orginal puzzle:
Code:

+-------+-------+-------+
| . 2 3 | . . 8 | . . 5 |
| . 1 . | 3 . 2 | . . . |
| . . . | 4 7 . | . . . |
+-------+-------+-------+
| 9 . 6 | . 5 . | 1 . 8 |
| . . . | . . . | . . . |
| 1 . 8 | . 3 . | 2 . 4 |
+-------+-------+-------+
| . . . | . 4 9 | . . . |
| . . . | 7 . 6 | . 9 . |
| 6 . . | 8 . . | 5 1 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site
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JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

PostPosted: Wed Nov 02, 2016 11:59 am    Post subject: Reply with quote

Code:
+----------------+----------+------------------+
| 47      2   3  | 1  69  8 | 679   47   5     |
| 457     1   57 | 3  69  2 | 6789  478  69    |
| 8       6   9  | 4  7   5 | 3     2    1     |
+----------------+----------+------------------+
| 9       37  6  | 2  5   4 | 1     37   8     |
| 7-2(3)  4   27 | 6  8   1 | 79    5    9(3)  |
| 1       5   8  | 9  3   7 | 2     6    4     |
+----------------+----------+------------------+
| 7-3(2)  37  1  | 5  4   9 | 68    38   36(2) |
| 235     8   25 | 7  1   6 | 4     9    (23)  |
| 6       9   4  | 8  2   3 | 5     1    7     |
+----------------+----------+------------------+
S-Wing : the solutions of {2R7, (23)r8c9, 3R5} -> 2r7c1==3r5c1 -> -{2r5c1, 3r7c1}; stte
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the_lock_man



Joined: 18 Dec 2012
Posts: 40
Location: Portsmarfff, UK

PostPosted: Wed Nov 02, 2016 12:17 pm    Post subject: Reply with quote

Also a 2-stepper, the X wing on 3s also reveals a W-Wing on 27 (boxes 4 & 7), R8C3 <>2, then stte.

S-Wing? What's one of them, then?
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK

PostPosted: Wed Nov 02, 2016 12:35 pm    Post subject: XY chain? Reply with quote

a 1 stepper but involving 4 not 3 pairs 2379 if r8c9 is not 2 it is 3 & that leads via row 5 to r5c3 = 2 so r8c3 >< 2

Last edited by George Woods on Thu Nov 03, 2016 5:11 pm; edited 1 time in total
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS

PostPosted: Wed Nov 02, 2016 1:02 pm    Post subject: Nov 2 VH Reply with quote

257 xy-wing - R2C3 = 7

Early Earl


Last edited by Earl on Wed Nov 02, 2016 1:57 pm; edited 2 times in total
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hughwill



Joined: 05 Apr 2010
Posts: 422
Location: Birmingham UK

PostPosted: Wed Nov 02, 2016 1:43 pm    Post subject: Reply with quote

Not for the first time I made an error- the diagram given in my post
was after the X wing on 3. The after basics diagram should have been:
Code:

+-----------+--------+------------+
| 47  2  3  | 1 69 8 | 69 47  5   |
| 457 1  57 | 3 69 2 | 78 478 69  |
| 8   6  9  | 4 7  5 | 3  2   1   |
+-----------+--------+------------+
| 9   37 6  | 2 5  4 | 1  37  8   |
| 237 4  27 | 6 8  1 | 79 5   39  |
| 1   5  8  | 9 3  7 | 2  6   4   |
+-----------+--------+------------+
| 237 37 1  | 5 4  9 | 68 38  236 |
| 235 8  25 | 7 1  6 | 4  9   23  |
| 6   9  4  | 8 2  3 | 5  1   7   |
+-----------+--------+------------+

Play this puzzle online at the Daily Sudoku site
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Wed Nov 02, 2016 8:56 pm    Post subject: Reply with quote

Quote:
S-Wing? What's one of them, then?


If you get an answer you might be sorry you asked.
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