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May 6 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 686
Location: Dar es Salaam Tanzania

PostPosted: Thu May 05, 2011 11:33 pm    Post subject: May 6 VH Reply with quote

W-Wing 57 with strong link 5 in col 7 solves it by setting r7c6<>7.
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prakash



Joined: 02 Jan 2008
Posts: 67
Location: New Jersey, USA

PostPosted: Fri May 06, 2011 2:07 am    Post subject: Reply with quote

Also a sashimi X wing on 5 does the trick.
A two stepper ... X wing on 6 followed by a BUG+1
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Ema Nymton



Joined: 17 Apr 2009
Posts: 87

PostPosted: Fri May 06, 2011 10:45 am    Post subject: Reply with quote

.



prakash wrote:
Also a sashimi X wing on 5 does the trick.
A two stepper ... X wing on 6 followed by a BUG+1


For those of us who need a show and tell session:

Code:

+----------+-----------+---------+
| 5 4   2  | 7  8   6  | 9  3  1 |
| 3 1   7  | 5  9   4  | 8  2  6 |
| 6 9   8  | 2  3   1  | 7  4  5 |
+----------+-----------+---------+
| 4 2   1  | 8  567 57 | 56 9  3 |
| 8 56A 9  | 1  4   3  | 2 B56 7 |
| 7 X35 36 | 9  56* 2  | 1  8  4 |
+----------+-----------+---------+
| 2 8   36 | 36 1   57 | 4  57 9 |
| 9 37Y 4  | 36 57Z 8  | 56 1  2 |
| 1 67D 5  | 4  2   9  | 3 C67 8 |
+----------+-----------+---------+


ABCD forces the removal of '6' from X&Y. If A is '6' then C must be '6' and if D is '6' then B must be '6'
XYZ removes the '5' from r6c5.

Ema Nymton
.
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Clement



Joined: 24 Apr 2006
Posts: 686
Location: Dar es Salaam Tanzania

PostPosted: Fri May 06, 2011 11:28 am    Post subject: May 6 VH Reply with quote

Another single stepper is a kite in 5 originating from BOX 9 which removes 5 in r4c6.
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keith



Joined: 19 Sep 2005
Posts: 3184
Location: near Detroit, Michigan, USA

PostPosted: Fri May 06, 2011 4:47 pm    Post subject: Reply with quote

The "official" solution is probably an X-wing on 6 followed by an XY-wing.

Or, there is a different XY-wing available before the X-wing.

After basics:
Code:
+----------------+----------------+----------------+
| 5    4    2    | 7    8    6    | 9    3    1    |
| 3    1    7    | 5    9    4    | 8    2    6    |
| 69   69   8    | 2    3    1    | 7    4    5    |
+----------------+----------------+----------------+
| 4    2    1    | 8    567  57   | 56   9    3    |
| 8    56   9    | 1    4    3    | 2    56   7    |
| 67   3567 36   | 9    56   2    | 1    8    4    |
+----------------+----------------+----------------+
| 2    8    36   | 36   1    57   | 4    57   9    |
| 679  3679 4    | 36   57   8    | 56   1    2    |
| 1    67   5    | 4    2    9    | 3    67   8    |
+----------------+----------------+----------------+
Keith

Last edited by keith on Fri May 06, 2011 6:49 pm; edited 1 time in total
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Fri May 06, 2011 6:12 pm    Post subject: Reply with quote

Skyscraper on 5 seems simplest single stepper.
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George Woods



Joined: 28 Mar 2006
Posts: 237
Location: Dorset UK

PostPosted: Fri May 06, 2011 10:00 pm    Post subject: yet another Reply with quote

as well as the X wing followed by bug+1 or XY wing or the single step W wing on 57 or the skyscaper in 5, there is an ER on 5s that denies a 5 at r4c7(just like the skyscraper) 'cos the strongly linked 5s in row8 would kill all the 5s in Box5
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