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2007 - Jan.2 VH

 
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria

PostPosted: Mon Jun 02, 2008 6:21 am    Post subject: 2007 - Jan.2 VH Reply with quote

While we wait...

One from the archives. And this one is a real gem. After basics:
Code:

+--------------------------+--------------------------+--------------------------+
| 458     2       3458     | 6       1       58       | 39      359     7        |
| 9       357     358      | 37      4       578      | 1       2       6        |
| 57      1       6        | 9       23      257      | 8       35      4        |
+--------------------------+--------------------------+--------------------------+
| 1       4       23       | 5       23      79       | 6       79      8        |
| 578     357     2358     | 37      6       279      | 4       1       39       |
| 6       37      9        | 4       8       1        | 2       37      5        |
+--------------------------+--------------------------+--------------------------+
| 3       8       7        | 12      59      4        | 59      6       12       |
| 45      9       145      | 12      7       6        | 35      8       123      |
| 2       6       15       | 8       59      3        | 7       4       19       |
+--------------------------+--------------------------+--------------------------+


There is NO x-wing!

One way to solve the puzzle is multi-coloring (either on 3 or on 7)
Another way would be our friend, the xy-wing (actually 2 xy-wings, both using 3,7,9 in boxes 5 and 6)
And, of course there is a UR, but that is too easy! (UR 1,2; r78c49 sets r8c9=3)
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