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Set J Puzzle 32 -- Advanced

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Feb 04, 2009 9:14 pm    Post subject: Set J Puzzle 32 -- Advanced Reply with quote
Code:
 +-----------------------+
 | . . . | . . 2 | . . . |
 | . 1 . | 5 . . | 9 . . |
 | . . 7 | 1 8 . | . . 5 |
 |-------+-------+-------|
 | . 8 5 | 3 . 9 | 7 . . |
 | . . 2 | . 7 5 | . 8 . |
 | 7 . . | 8 2 4 | 5 . . |
 |-------+-------+-------|
 | . 2 . | 9 . 8 | . 3 . |
 | . . . | . 4 . | 8 . . |
 | . . 8 | . . . | . . 2 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Wed Feb 04, 2009 9:56 pm    Post subject: Reply with quote
After basics:

Code:

 *--------------------------------------------------------------------*
 | 8      5      6      | 4      9      2      | 13     7      13     |
 | 2      1      34     | 5      36     7      | 9      46     8      |
 | 349    349    7      | 1      8      36     | 2      46     5      |
 |----------------------+----------------------+----------------------|
 | 46     8      5      | 3      1      9      | 7      2      46     |
 | 1349   349    2      | 6      7      5      | 13     8      1349   |
 | 7      369    139    | 8      2      4      | 5      19     1369   |
 |----------------------+----------------------+----------------------|
 | 1456   2      14     | 9      56     8      | 46     3      7      |
 | 3569   7      39     | 2      4      136    | 8      159    19     |
 | 34569  3469   8      | 7      356    136    | 46     159    2      |
 *--------------------------------------------------------------------*


The first VH step I found killed it!
Quote:
ER <9> with hinge in box <6> and strong link in col <3>

Ted
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Thu Feb 05, 2009 12:16 am    Post subject: Reply with quote
Ted: You caught me with my solver down!!! Very Happy

I don't directly solve for that technique. Instead, I normally catch it indirectly through Colors and Multiple Colors. However, you found a case where they don't work as a substitute. Congratulations!
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ronk



Joined: 07 May 2006
Posts: 398
PostPosted: Thu Feb 05, 2009 2:05 am    Post subject: Reply with quote
tlanglet wrote:

The first VH step I found killed it!
Quote:
ER <9> with hinge in box <6> and strong link in col <3>

A finned x-wing (9)c38\r68 with fin r9c8 does the same.

[edit: Aha, I see! Despite the fact that the ER move and finned x-wing move both consist of two strong links and three weak links, the later is considered Advanced, rather than VH+]
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Feb 11, 2009 10:57 pm    Post subject: Reply with quote
Ted's strong link on 9 in column 3 for the ER also connects the 19 pairs for a one-step W-Wing.
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