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One more VanH

 
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keith



Joined: 19 Sep 2005
Posts: 3178
Location: near Detroit, Michigan, USA

PostPosted: Wed Jan 23, 2013 6:50 pm    Post subject: One more VanH Reply with quote

Code:
Puzzle: vH4-941195vh2.1.0.2
+-------+-------+-------+
| 7 6 . | . . 9 | 5 . . |
| . . . | . . . | . . . |
| . . . | 8 . 6 | 3 1 . |
+-------+-------+-------+
| 9 2 4 | . . . | . . 8 |
| . . . | 6 . 8 | . . . |
| 8 . . | . . . | 2 7 3 |
+-------+-------+-------+
| . 3 9 | 2 . 4 | . . . |
| . . . | . . . | . . . |
| . . 7 | 3 . . | . 8 2 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5164
Location: Rochester, NY, USA

PostPosted: Thu Jan 24, 2013 4:39 am    Post subject: Reply with quote

I had trouble with this one, not finding any killer moves. So I started hacking away at it, playing two DPs, a Fin Transport and Simple Coloring and getting nowhere.

Then I found a short AIC which set r4c4<>5 which finished it up. I'd like to know if that was available before the other moves.
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keith



Joined: 19 Sep 2005
Posts: 3178
Location: near Detroit, Michigan, USA

PostPosted: Thu Jan 24, 2013 12:53 pm    Post subject: Reply with quote

After basics:
Code:
+-------------------+-------------------+-------------------+
| 7     6     8     | 1     3     9     | 5     2     4     |
| 1345  145   135   | 457   457   2     | 8     9     6     |
| 245   9     25    | 8     45    6     | 3     1     7     |
+-------------------+-------------------+-------------------+
| 9     2     4     | 57    157   3     | 16    56    8     |
| 135   7     135   | 6     2     8     | 19    4     159   |
| 8     15    6     | 49    49    15    | 2     7     3     |
+-------------------+-------------------+-------------------+
| 156   3     9     | 2     8     4     | 7     56    15    |
| 12456 8     125   | 59    1569  7     | 1469  3     159   |
| 1456  145   7     | 3     1569  15    | 1469  8     2     |
+-------------------+-------------------+-------------------+

There is a SS on 1 in R4C6 that takes out 1 in R9C7.

Also, a UR 57 in R24C45 takes out 5 in R4C5.
Code:
+-------------------+-------------------+-------------------+
| 7     6     8     | 1     3     9     | 5     2     4     |
| 1345  145   135   | 457   457   2     | 8     9     6     |
| 245   9     25    | 8     45    6     | 3     1     7     |
+-------------------+-------------------+-------------------+
| 9     2     4     |-57    17    3     | 16   D56    8     |
| 135   7     135   | 6     2     8     | 19    4    C159   |
| 8     15    6     | 49    49    15    | 2     7     3     |
+-------------------+-------------------+-------------------+
| 156   3     9     | 2     8     4     | 7     56    15    |
| 12456 8     125   |A59   B1569  7     |B1469  3    B159   |
| 1456  145   7     | 3     1569  15    | 1469  8     2     |
+-------------------+-------------------+-------------------+

M-wing: If A is 9 C is 9; AD are pincers on 5. Taking out 5 in R4C4.

A skyscraper or remote pair 45 finishes it off.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5164
Location: Rochester, NY, USA

PostPosted: Thu Jan 24, 2013 4:28 pm    Post subject: Reply with quote

I used the 57 UR and took out the 1 with coloring; i don't see the SS. Obviously I missed the M-Wing unless I had a bad grid.
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keith



Joined: 19 Sep 2005
Posts: 3178
Location: near Detroit, Michigan, USA

PostPosted: Thu Jan 24, 2013 7:06 pm    Post subject: Reply with quote

Marty R. wrote:
i don't see the SS.

Code:
+-------------------+-------------------+-------------------+
| 7     6     8     | 1     3     9     | 5     2     4     |
| 1345  145   135   | 457   457   2     | 8     9     6     |
| 245   9     25    | 8     45    6     | 3     1     7     |
+-------------------+-------------------+-------------------+
| 9     2     4     | 57   #157   3     |#16    56    8     |
| 135   7     135   | 6     2     8     | 19    4     159   |
| 8     15    6     | 49    49   @15    | 2     7     3     |
+-------------------+-------------------+-------------------+
| 156   3     9     | 2     8     4     | 7     56    15    |
| 12456 8     125   | 59    1569  7     | 1469  3     159   |
| 1456  145   7     | 3     1569 @15    |-1469  8     2     |
+-------------------+-------------------+-------------------+

Probably the same as your coloring move.

Is my M-wing different than your AIC chain?

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5164
Location: Rochester, NY, USA

PostPosted: Thu Jan 24, 2013 7:55 pm    Post subject: Reply with quote

keith wrote:
Marty R. wrote:
i don't see the SS.

Code:
+-------------------+-------------------+-------------------+
| 7     6     8     | 1     3     9     | 5     2     4     |
| 1345  145   135   | 457   457   2     | 8     9     6     |
| 245   9     25    | 8     45    6     | 3     1     7     |
+-------------------+-------------------+-------------------+
| 9     2     4     | 57   #157   3     |#16    56    8     |
| 135   7     135   | 6     2     8     | 19    4     159   |
| 8     15    6     | 49    49   @15    | 2     7     3     |
+-------------------+-------------------+-------------------+
| 156   3     9     | 2     8     4     | 7     56    15    |
| 12456 8     125   | 59    1569  7     | 1469  3     159   |
| 1456  145   7     | 3     1569 @15    |-1469  8     2     |
+-------------------+-------------------+-------------------+

Probably the same as your coloring move.

Is my M-wing different than your AIC chain?

Keith


I don't remember exactly how I eliminated the 1. I still don't see a Skyscraper. I see what some would call a Kite emanating from box 5, but since it's not weakly linked I'd call it a Simple Coloring chain.

My AIC had r8c4=9 proving r9c7=9, then move up to box 6 to prove the 5.
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tlanglet



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Sat Jan 26, 2013 1:59 pm    Post subject: Reply with quote

Here is another solution......

(1=5)r9c6-(5=9)r8c4-r8c79=r9c7-(9=1)r5c7-r5c13=r6c2-r6c6=1r9c6 => r9c6=1

coloring(5) completes the puzzle.

Ted
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