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Puzzle 10/05/21: (B) BBDB XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri May 21, 2010 3:28 pm    Post subject: Puzzle 10/05/21: (B) BBDB XY Reply with quote
Time to practice you M-Wing and W-Wing skills. Lots of choices!

Code:
 +-----------------------+
 | 7 3 . | . . . | . . 6 |
 | 6 . 9 | 3 . . | . . . |
 | . 2 . | 7 . 9 | 1 . 3 |
 |-------+-------+-------|
 | . 5 3 | 2 . . | . . . |
 | . . . | . . 1 | 2 . 8 |
 | . . 8 | . 9 . | . 5 . |
 |-------+-------+-------|
 | . . 2 | . 7 . | 6 . . |
 | . . . | . . 6 | . . . |
 | 5 . 6 | . 8 . | . . 7 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sat May 22, 2010 8:36 am    Post subject: Reply with quote
Three moves including a suggested "practise" wing...

Quote:
x-wing(4); r1c8, r7c18, r8c18<>4
w-wing(14); (4=1)r6c2-r2c2=r1c3-(1=4)r8c3; r79c2<>4
xy-chain (2=5)r1c5-(5=2)r8c5-(2=3)r9c6-(3=2)r9c8; r1c8<>2 (same move is a kite but I was in bivalue mode by now!)
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat May 22, 2010 3:19 pm    Post subject: Reply with quote
I needed five steps.

W-Wing (14), flightless, with pincer transport
XY-Wing (194)
X-Wing (4)
M-Wing (48)
Simple coloring (2)
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