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Puzzle 10/03/01 (B)

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Mon Mar 01, 2010 6:48 pm    Post subject: Puzzle 10/03/01 (B) Reply with quote

Probably difficult as VH+.

Code:
 +-----------------------+
 | . . . | . . . | 1 . . |
 | . 5 . | 1 . 3 | 4 . . |
 | . . . | 6 4 7 | . . . |
 |-------+-------+-------|
 | . 9 7 | 2 . 1 | 5 4 . |
 | . . 5 | . . . | . . . |
 | . 3 4 | 9 . 5 | . 7 . |
 |-------+-------+-------|
 | 6 4 . | 7 . . | 2 . . |
 | . . . | 5 . 6 | . . . |
 | . . . | . . . | . . 1 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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Marty R.



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

PostPosted: Tue Mar 02, 2010 5:28 am    Post subject: Reply with quote

Two steps.

Quote:
W-Wing (89)
XY-Wing (389)
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Tue Mar 02, 2010 2:53 pm    Post subject: Reply with quote

Three steps.

Quote:
xy-wing -279 with vertex in r2c1,
xyz-wing 389 in r3c7,
w-wing 89 in r2c8 and r5c7.

Ted
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Marty R.



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

PostPosted: Tue Mar 02, 2010 10:23 pm    Post subject: Reply with quote

Thanks to Ted I redid it and found I needed three steps. I don't think I did it differently, I think the first time I failed to include in my notes that my 1st step was an XY-Wing (279).
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Fri Mar 05, 2010 6:50 pm    Post subject: Reply with quote

Code:
 <27+9>  XY-Wing  r1c2/r1c6+r2c1         <> 9    r1c3,r2c5
 <79+2>  XY-Wing  r2c1/r1c2+r2c5         <> 2    r1c6,r2c3

 r1c1    2-String Kite                   <> 3    r8c8

 c18\r28 finned  X-Wing                  <> 9    r2c3

 <38+9>  XYZ-Wing r3c7/r2c8+r3c1         <> 9    r3c9

 <58+9>  XY-Wing  r3c9/r2c8+r7c9         <> 9    r8c8
 <59+8>  XY-Wing  r7c9/r3c9+r8c8         <> 8    r2c8

I don't recall which steps were necessary.
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