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Sep 29 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 656
Location: Dar es Salaam Tanzania

PostPosted: Wed Sep 28, 2011 11:04 pm    Post subject: Sep 29 VH Reply with quote

XY-Wing 39 34 49 pivoted in r2c1 or the same in r4c1 sets r4c4<>9 or r2c4<>4 respectively solving it.
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arkietech



Joined: 31 Jul 2008
Posts: 1708
Location: Northwest Arkansas USA

PostPosted: Thu Sep 29, 2011 9:18 am    Post subject: Reply with quote

Code:
*--------------------------------------------------*
 | 5    79   47   | 6    249  3    | 19   129  8    |
 | 34   2    1    | 49   8    5    | 6    7    39   |
 | 6    89  *38   | 1    29   7    | 5   *239  4    |
 |----------------+----------------+----------------|
 | 39   1    6    | 49   349  2    | 8    5    7    |
 | 2    78   78   | 5    39   6    | 4   *39   1    |
 | 349  5   *34   | 7    1    8    | 2    6    9-3  |
 |----------------+----------------+----------------|
 | 8    6    9    | 3    5    1    | 7    4    2    |
 | 1    4    5    | 2    7    9    | 3    8    6    |
 | 7    3    2    | 8    6    4    | 19   19   5    |
 *--------------------------------------------------*
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George Woods



Joined: 28 Mar 2006
Posts: 232
Location: Dorset UK

PostPosted: Thu Sep 29, 2011 10:58 am    Post subject: an Er solution Reply with quote

consider the 3s in Block 1 and SL3s in col 9. r6c3 cannot be 3 for if so there would be no place for 3s in Block 1
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