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Helmut's Advanced Mar 20

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Thu Mar 24, 2011 1:50 am    Post subject: Helmut's Advanced Mar 20 Reply with quote
There is an unusual DP (which doesn't help to solve the puzzle).
Code:

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

Play this puzzle online at the Daily Sudoku site

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Mar 24, 2011 4:46 am    Post subject: Reply with quote
I don't know if this is the one you were thinking of, but there was a potential DP in boxes 47 on 59-57-79. R8c3=6 to kill it.

W-Wing (28); r2c9<>2
BUG+2
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Thu Mar 24, 2011 5:19 am    Post subject: Reply with quote
one of the w-wings solves it in one step
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