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Sep 1 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Mon Aug 31, 2015 10:45 pm    Post subject: Sep 1 VH Reply with quote

Code:

+-------------+----------+----------+
| 4  9    8   | 3  1  2  | 6   5  7 |
| 2  5    6   | 8  9  7  | 4   1  3 |
| 7  1    3   | 6  4  5  | 9   8  2 |
+-------------+----------+----------+
| 58 3478 457 | 2  6  34 | 35  9  1 |
| 9  34   245 | 1  37 8  | 235 47 6 |
| 1  6    24  | 47 5  9  | 23  47 8 |
+-------------+----------+----------+
| 6  47   1   | 9  37 34 | 8   2  5 |
| 58 478  457 | 47 2  6  | 1   3  9 |
| 3  2    9   | 5  8  1  | 7   6  4 |
+-------------+----------+----------+
XY-Wing 34-7 pivoted in r5c2; r7c5<>7; stte
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George Woods



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

PostPosted: Tue Sep 01, 2015 10:07 am    Post subject: did it need any v hard moves Reply with quote

I did it twice but both times no advanced moves clements grid gives a 3 in Box 6

I looked again and found that I had used a BUG +1 -such an obvious move that I forgot I had used it!
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bat999



Joined: 09 Jul 2015
Posts: 55
Location: UK

PostPosted: Tue Sep 01, 2015 12:41 pm    Post subject: Reply with quote

Code:
.-------------.-------------.-----------.
| 4   9    8  | 3    1   2  | 6   5   7 |
| 2   5    6  | 8    9   7  | 4   1   3 |
| 7   1    3  | 6    4   5  | 9   8   2 |
:-------------+-------------+-----------:
| 8   347  47 | 2    6   34 | 5   9   1 |
| 9   3-4  5  | 1   c37  8  | 2  d47  6 |
| 1   6    2  | 47   5   9  | 3   47  8 |
:-------------+-------------+-----------:
| 6  a47   1  | 9   b37  34 | 8   2   5 |
| 5   8    47 | 47   2   6  | 1   3   9 |
| 3   2    9  | 5    8   1  | 7   6   4 |
'-------------'-------------'-----------'
(4=7)r7c2 - r7c5 = r5c5 - (7=4)r5c8 => -4 r5c2; stte
Cool
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dongrave



Joined: 06 Mar 2014
Posts: 568

PostPosted: Tue Sep 01, 2015 10:30 pm    Post subject: Reply with quote

You can also move the pivot of Clement's XY-Wing to r7c2 and use the 47-3 XY-Wing so r5c5<>3. That was a very easy 'very hard', wasn't it?
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