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Oct 5 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Sun Oct 04, 2009 10:17 pm    Post subject: Oct 5 VH Reply with quote

UR-<69>r78c14 eliminates 7 in r1c4 solving the puzzle.
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK

PostPosted: Sun Oct 04, 2009 10:28 pm    Post subject: Anotherearly solution on the 3rd move! Reply with quote

Once again this can be solved at a very early stage

Quote:
After the 9 in BOX 4 and the 7 in Box 6 the two 47s
in boxes 3 and 9 create a W-Wing operating on the 4s
of col 9, denying a 7 in col 8 of Box 3, so r1c7=7.
To demonstrate this
Go to draw/play. "Sweep" exposes the 9 in box 4,
"sweep" once again exposes the 7 in box 6, and the
W-Wing is now apparent. Enter the 7 in box 3
and then "Grade". the The remainder of the puzzle is graded "Easy")

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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS

PostPosted: Mon Oct 05, 2009 2:37 am    Post subject: Oct 5 VH Reply with quote

There may be many routes, but old reliable comes through again.

A Solution: 247 xy-wing.

Earl
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Mon Oct 05, 2009 3:39 am    Post subject: Reply with quote

I looked around and saw four possibilities.

1) The UR
2) XY-Wing with pincer transport
3) W-Wing followed by a pincer transport
4) A DP on 78-68-67

I don't know if every one of those solves it though.
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

PostPosted: Mon Oct 05, 2009 12:43 pm    Post subject: Reply with quote

Code:
 *--------------------------------------------------*
 | 2    9    1    | 78   478  5    | 47   6    3    |
 | 8    5    6    | 3    47   9    | 1    247  24   |
 | 3    4    7    | 1    2    6    | 5    8    9    |
 |----------------+----------------+----------------|
 | 4    1    9    | 68   68   2    | 3    5    7    |
 | 5    8    2    | 4    3    7    | 6    9    1    |
 | 7    6    3    | 5    9    1    | 24   24   8    |
 |----------------+----------------+----------------|
 | 69   27   45   | 679  567  3    | 8    1    24   |
 | 69   27   8    | 69   1    4    | 27   3    5    |
 | 1    3    45   | 2    57   8    | 9    47   6    |
 *--------------------------------------------------*
Quote:
69URr78c14=>r7c4=7 singles follow
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