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Nov 30 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 686
Location: Dar es Salaam Tanzania

PostPosted: Thu Nov 29, 2012 11:12 pm    Post subject: Nov 30 VH Reply with quote

Code:

+-----------+------------+-------+
| 79 *47 469 | 8   467 1  | 2 3 5 |
| 1  3  -45  | 457 *47  2  | 8 9 6 |
| 8  2  56  | 59  3   69 | 7 4 1 |
+-----------+------------+-------+
| 79 8  49  | 47  2   5  | 1 6 3 |
| 3  46 1   | 49  8   69 | 5 2 7 |
| 5  #67 2   | 1   #67  3  | 4 8 9 |
+-----------+------------+-------+
| 4  5  8   | 3   9   7  | 6 1 2 |
| 6  9  7   | 2   1   8  | 3 5 4 |
| 2  1  3   | 6   5   4  | 9 7 8 |
+-----------+------------+-------+
W-Wing 47 in BOX 12 with SL 7 in row 6 ; r2c3<>4 solves it.
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Marty R.



Joined: 12 Feb 2006
Posts: 5178
Location: Rochester, NY, USA

PostPosted: Fri Nov 30, 2012 1:29 am    Post subject: Re: Nov 30 VH Reply with quote

Clement wrote:
Code:

+-----------+------------+-------+
| 79 *47 469 | 8   467 1  | 2 3 5 |
| 1  3  -45  | 457 *47  2  | 8 9 6 |
| 8  2  56  | 59  3   69 | 7 4 1 |
+-----------+------------+-------+
| 79 8  49  | 47  2   5  | 1 6 3 |
| 3  46 1   | 49  8   69 | 5 2 7 |
| 5  #67 2   | 1   #67  3  | 4 8 9 |
+-----------+------------+-------+
| 4  5  8   | 3   9   7  | 6 1 2 |
| 6  9  7   | 2   1   8  | 3 5 4 |
| 2  1  3   | 6   5   4  | 9 7 8 |
+-----------+------------+-------+
W-Wing 47 in BOX 12 with SL 7 in row 6 ; r2c3<>4 solves it.


Locked 7s in box 1 set r1c5<>7, exposing a 467 XY-Wing pivoted in that cell.

There's also a rather easy BUG+2 in which both killers are 4 which form pincers.
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arkietech



Joined: 31 Jul 2008
Posts: 1733
Location: Northwest Arkansas USA

PostPosted: Fri Nov 30, 2012 7:32 am    Post subject: Reply with quote

Code:
 *--------------------------------------------------*
 | 79   47   469  | 8    46   1    | 2    3    5    |
 | 1    3    45   | 57   47   2    | 8    9    6    |
 | 8    2    56   | 59   3    69   | 7    4    1    |
 |----------------+----------------+----------------|
 | 79   8    49   | 47   2    5    | 1    6    3    |
 | 3    46   1    | 49   8    69   | 5    2    7    |
 | 5    67   2    | 1    67   3    | 4    8    9    |
 |----------------+----------------+----------------|
 | 4    5    8    | 3    9    7    | 6    1    2    |
 | 6    9    7    | 2    1    8    | 3    5    4    |
 | 2    1    3    | 6    5    4    | 9    7    8    |
 *--------------------------------------------------*
xy-wing
(4=5)r2c3-(5=7)r2c4-(7=4)r4c4 => -4r4c3; stte
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kuskey



Joined: 10 Dec 2008
Posts: 127
Location: Pembroke, NH

PostPosted: Fri Nov 30, 2012 2:25 pm    Post subject: Nov 30 VH Reply with quote

my after basic code agrees with arietech which reveals a BUG+1 in box 1
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