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Puzzle 10/07/06: Advanced

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Tue Jul 06, 2010 8:33 pm    Post subject: Puzzle 10/07/06: Advanced Reply with quote
Code:
 +-----------------------+
 | 5 . 9 | . . 1 | 8 . . |
 | . 4 . | . . . | . . . |
 | 8 . 1 | . . . | . . 3 |
 |-------+-------+-------|
 | . . . | 7 . 5 | . 2 6 |
 | . . . | . 1 . | . 8 . |
 | 6 . . | 2 . 3 | 9 . . |
 |-------+-------+-------|
 | 9 . . | . . 4 | 6 . . |
 | . . . | 5 9 . | . 7 . |
 | . . 8 | 1 . . | . . 5 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Code:
 after basics
 +--------------------------------------------------------------+
 |  5     3     9     |  4     27    1     |  8     6     27    |
 |  27    4     267   |  3     56    8     |  1257  15    9     |
 |  8     267   1     |  9     56    27    |  257   4     3     |
 |--------------------+--------------------+--------------------|
 |  1     9     4     |  7     8     5     |  3     2     6     |
 |  237   257   2357  |  6     1     9     |  57    8     4     |
 |  6     8     57    |  2     4     3     |  9     15    17    |
 |--------------------+--------------------+--------------------|
 |  9     1257  257   |  8     27    4     |  6     3     12    |
 |  234   126   236   |  5     9     26    |  124   7     8     |
 |  247   267   8     |  1     3     267   |  24    9     5     |
 +--------------------------------------------------------------+
 # 50 eliminations remain
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Mogulmeister



Joined: 03 May 2007
Posts: 1151
PostPosted: Wed Jul 07, 2010 10:39 am    Post subject: Reply with quote
A conventional 3 step stab:

Quote:

It's all about 7s......

1. XYZ Wing 257 vertex at r3c7; r2c7<>7

2.A sashimi swordfish on 7s with fin at r7c2; r9c1<>7

3.XY Wing <267> vertex at r3c2; r9c6<>7
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Wed Jul 07, 2010 1:43 pm    Post subject: Reply with quote
My first and third steps were identical to those posted by MM, but I had a different second step........

Quote:
xyz-wing (257)r3c7; r2c7<>7
Almost xy-wing 26-7: vertex(26)r3c2, pincer (27)r2c1, pincer (67)r9c2, fin (2)r9c2
If xy-wing is true: r9c1<>7
If fin is true: (2)r9c2-(2=6)r3c2-r2c3=(6-3)r8c3=(3-4)r8c1=(4)r9c1; r9c1<>7
xy-wing 26-7; r9c6<>7

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Jul 07, 2010 10:53 pm    Post subject: Reply with quote
X-Wing (2)
ER (7)
XYZ-Wing (257)
And finished with a move that I tried to get a name for in the thread I started in the other sub-forum. A potential 23 DP in boxes 47 generated a pincer situation; r9c1<>4.
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