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5/11 Brainbasher Super Hard

 
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Mesmin



Joined: 01 May 2007
Posts: 12
Location: Ontario

PostPosted: Fri May 11, 2007 1:12 pm    Post subject: 5/11 Brainbasher Super Hard Reply with quote

A little something until the next Very Hard shows up here. An interesting puzzle from BrainBashers that didn't (as usual) require a UR before the puzzle to fall apart.

It opened up with either a skyscraper or a finned x-wing for me.

Code:

+-------+-------+-------+
| 9 . . | . . 1 | . . . |
| . 8 2 | 5 . 7 | . . . |
| . . . | . . . | 2 . 7 |
+-------+-------+-------+
| . 6 . | 4 . . | 5 . . |
| . . 5 | 8 7 2 | 3 . . |
| . . 8 | . . 3 | . 1 . |
+-------+-------+-------+
| 3 . 9 | . . . | . . . |
| . . . | 1 . 8 | 4 3 . |
| . . . | 2 . . | . . 6 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site
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Mogulmeister



Joined: 03 May 2007
Posts: 695

PostPosted: Fri May 11, 2007 6:11 pm    Post subject: UR Reply with quote

Thanks,

Nice puzzle. Needless to say there is a UR in there (4,9) but for me an XY wing followed by a skyscraper did the job.

Where was the finned x-wing ?
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keith



Joined: 19 Sep 2005
Posts: 3182
Location: near Detroit, Michigan, USA

PostPosted: Fri May 11, 2007 11:15 pm    Post subject: next ... Reply with quote

This is a very interesting puzzle!

I run out of basic moves at this point:

Code:
+----------------+----------------+----------------+
| 9    457  47   | 3    2    1    | 6    458  58   |
| 46   8    2    | 5    46   7    | 1    9    3    |
| 1456 3    146  | 9    8    46   | 2    45   7    |
+----------------+----------------+----------------+
| 7    6    3    | 4    1    9    | 5    28   28   |
| 14   149  5    | 8    7    2    | 3    6    49   |
| 24   249  8    | 6    5    3    | 7    1    49   |
+----------------+----------------+----------------+
| 3    245  9    | 7    46   456  | 8    25   1    |
| 256  257  67   | 1    9    8    | 4    3    25   |
| 8    145  14   | 2    3    45   | 9    7    6    |
+----------------+----------------+----------------+


What next? There is a UR, an XY wing and at least one XYZ wing.

I find that these interact, one destroys the other. Depending on which you choose, the puzzle may be solved, or it gets harder!

Keith
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Mogulmeister



Joined: 03 May 2007
Posts: 695

PostPosted: Sat May 12, 2007 5:36 pm    Post subject: Reply with quote

For me at this point Keith, I pays me money and takes me choice.

You can either go:

1)Skyscraper on 5's which effectively finishes the puzzle off




OR

2)Go with the XY wing (see below)




Which takes a bit longer if you ignore the skyscraper........
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