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Puzzle 10/08/07: C

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Aug 07, 2010 4:40 pm    Post subject: Puzzle 10/08/07: C Reply with quote
Code:
 +-----------------------+
 | . . 3 | 5 . 6 | . . . |
 | . 4 . | 8 . 3 | . . 6 |
 | 5 . 6 | 4 . 7 | . 3 . |
 |-------+-------+-------|
 | 8 2 7 | . . . | 3 . . |
 | . . . | . 4 . | 7 . . |
 | 4 3 1 | . . 8 | . 6 5 |
 |-------+-------+-------|
 | . . . | 1 3 . | . . 2 |
 | . . 8 | . . 5 | . . . |
 | . 1 . | . . 4 | 6 . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Rating wrote:
VH
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Mon Aug 09, 2010 9:40 am    Post subject: Reply with quote
Using the pseudocell of a UR makes a nice one-step...

Quote:
UR(19) makes a (27) pseudocell in c1 which makes this little xy-chain

xy-chain with UR (6=7)r7c1 - UR(19)r12c15:(7=2)r12c1 - (2=9)r2c2 - (9=5)r5c3 - (5=6)r5c2 ; r5c1<>6, r7c2<>6
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Aug 09, 2010 12:23 pm    Post subject: Reply with quote
Peter: An interesting use of a UR.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Tue Aug 10, 2010 12:34 am    Post subject: Reply with quote
I started with an XY-Wing (679), then played the 19 UR using a 237 pseudo cell. If Peter used a 27 pseudo cell, that means I missed something in basics (I think).
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Luke451



Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California
PostPosted: Tue Aug 10, 2010 5:07 am    Post subject: Reply with quote
peterj wrote:
Using the pseudocell of a UR makes a nice one-step...

Quote:
UR(19) makes a (27) pseudocell in c1 which makes this little xy-chain

xy-chain with UR (6=7)r7c1 - UR(19)r12c15:(7=2)r12c1 - (2=9)r2c2 - (9=5)r5c3 - (5=6)r5c2 ; r5c1<>6, r7c2<>6

"Dat's a good vun," to quote my governor.

Pretty cool, Peter Cool .
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