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Feb 14 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
PostPosted: Sat Feb 13, 2010 11:43 pm    Post subject: Feb 14 VH Reply with quote
W-Wing <36>-6=6-<36> eliminates 3 in r8c8 solving the puzzle.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun Feb 14, 2010 1:24 am    Post subject: Reply with quote
I guess I didn't notice the W-Wing, but an M-Wing on 36 did it. I also spotted an XY-Wing (236) which set up an easy BUG+2.
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
PostPosted: Sun Feb 14, 2010 9:09 am    Post subject: an XY chain Reply with quote
I tried to find a W-wing using the 36s in squares 2 and 8 - No Joy BUT
The four unfilled cells in col 4 have just 2 candidates in each. Therefore they are a chain. So substitute the 36 in square 8 for the one in sqaure 2 and we have another chain 62 29 93 36 whose two ends bear down on r5c5 denying it a 6 and solving the puzzle.
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Sun Feb 14, 2010 2:05 pm    Post subject: Reply with quote
Code:
 
 *--------------------------------------------------*
 | 2    9    4    | 8    5    67   | 3    1    67   |
 | 1    5    8    | 36   367  9    | 2    4    67   |
 | 7    6    3    | 1    2    4    | 5    9    8    |
 |----------------+----------------+----------------|
 | 5    13   26   | 7    9    126  | 8   *36   4    |
 | 4    13   9    | 5   #16   8    | 7   #236  23   |
 | 8    7    26   | 26   4    3    | 9    5    1    |
 |----------------+----------------+----------------|
 | 6    2    1    | 39   8    5    | 4    7    39   |
 | 9    8    7    | 4   *36   26   | 1    2-3  5    |
 | 3    4    5    | 29   17   17   | 6    8    29   |
 *--------------------------------------------------*
w-wing 36
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada
PostPosted: Sun Feb 14, 2010 2:12 pm    Post subject: Reply with quote
That's interesting. I assumed there was an xy-wing finish and gave up looking because I find those things tedious to find. So I checked the forum and saw W-wings, M-wings, Chains and a Bug+2. I didn't think the VH's required these more advanced techniques. Someone find an xy-wing - I'm too lazy.
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Sun Feb 14, 2010 3:13 pm    Post subject: Reply with quote
cgordon wrote:
Someone find an xy-wing - I'm too lazy.

You will have to find 2 xy-wings 236 and 126 to solve it under your rules.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun Feb 14, 2010 4:33 pm    Post subject: Reply with quote
My M-Wing was on the 36 pairs in boxes 28.
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Wendy W



Joined: 04 Feb 2008
Posts: 144
PostPosted: Sun Feb 14, 2010 5:59 pm    Post subject: Reply with quote
Dan, that's exactly how I did it -- two xy-wings. Piece o' cake compared to Danny's puzzles recently!
Happy Valentine's Day and an xo-wing to all my fellow Sudoku players.
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kragzy



Joined: 01 May 2007
Posts: 112
Location: Australia
PostPosted: Mon Feb 15, 2010 3:33 am    Post subject: Reply with quote
Thanks Wendy. Rolling Eyes
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Ema Nymton



Joined: 17 Apr 2009
Posts: 89
PostPosted: Mon Feb 15, 2010 12:02 pm    Post subject: Reply with quote
.

For the rest of us:

Code:

+---------+-----------+----------+
| 2 9  4  | 8  5   67 | 3 1   67 |
| 1 5  8  | 36 367 9  | 2 4   67 |
| 7 6  3  | 1  2   4  | 5 9   8  |
+---------+-----------+----------+
| 5 13 26 | 7  9   12 | 8 36  4  |
| 4 13 9  | 5  16  8  | 7 236 23 |
| 8 7  26 | 26 4   3  | 9 5   1  |
+---------+-----------+----------+
| 6 2  1  | 39 8   5  | 4 7   39 |
| 9 8  7  | 4  36* 26 | 1 23  5  |
| 3 4  5  | 29 17  17 | 6 8   29 |
+---------+-----------+----------+


DRAW/PLAY gives hint of '3' at r8c5. What is the line of reasoning?

Thank you.

Ema Nymton
~@:o|
.
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Kdelle



Joined: 20 Mar 2008
Posts: 59
Location: Hudson, NH
PostPosted: Mon Feb 15, 2010 1:07 pm    Post subject: Reply with quote
Ema Nymton wrote:
.

For the rest of us:

Code:

+---------+-----------+----------+
| 2 9  4  | 8  5   67 | 3 1   67 |
| 1 5  8  | 36 367 9  | 2 4   67 |
| 7 6  3  | 1  2   4  | 5 9   8  |
+---------+-----------+----------+
| 5 13 26 | 7  9   12 | 8 36  4  |
| 4 13 9  | 5  16  8  | 7 236 23 |
| 8 7  26 | 26 4   3  | 9 5   1  |
+---------+-----------+----------+
| 6 2  1  | 39 8   5  | 4 7   39 |
| 9 8  7  | 4  36* 26 | 1 23  5  |
| 3 4  5  | 29 17  17 | 6 8   29 |
+---------+-----------+----------+


DRAW/PLAY gives hint of '3' at r8c5. What is the line of reasoning?

Thank you.

Ema Nymton
~@Surprised|
.



Ema,

There is a wing in boxes 5 and 8 that eliminates the 6 at r8c5.

Kathy
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Ema Nymton



Joined: 17 Apr 2009
Posts: 89
PostPosted: Mon Feb 15, 2010 1:47 pm    Post subject: Reply with quote
.

Code:

+---------+-----------+----------+
| 2 9  4  | 8  5   67 | 3 1   67 |
| 1 5  8  | 36 367 9  | 2 4   67 |
| 7 6  3  | 1  2   4  | 5 9   8  |
+---------+-----------+----------+
| 5 13 26 | 7  9   12B| 8 36  4  |
| 4 13 9  | 5  16A 8  | 7 236 23 |
| 8 7  26 | 26 4   3  | 9 5   1  |
+---------+-----------+----------+
| 6 2  1  | 39 8   5  | 4 7   39 |
| 9 8  7  | 4  36* 26C| 1 23  5  |
| 3 4  5  | 29 17  17 | 6 8   29 |
+---------+-----------+----------+


Thank you. Now that you point it out,
r4c6 B
r5c5 A
r8c6 C, thus removing the 6 from r8c5.

Sometimes it seems the longer I am at this game, the dumber I get at seeing the forest for the trees.

~@:o)
.
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Wendy W



Joined: 04 Feb 2008
Posts: 144
PostPosted: Mon Feb 15, 2010 2:49 pm    Post subject: Reply with quote
Ema, please don't put yourself down! Just remember that learning new things as an adult is the best way to keep your brain in shape. At least that's what I tell myself!
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