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Puzzle 11/07/29: C XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Fri Jul 29, 2011 11:43 pm    Post subject: Puzzle 11/07/29: C XY Reply with quote

Code:
 +-----------------------+
 | . 4 1 | 3 . . | . 6 . |
 | 2 . . | . . . | 1 . . |
 | 6 . . | . 2 . | 3 . 8 |
 |-------+-------+-------|
 | 9 . . | 1 . . | 4 . . |
 | . . 7 | . . 4 | . . 9 |
 | . . . | . 7 9 | . . . |
 |-------+-------+-------|
 | . 2 4 | 5 . . | 7 . 1 |
 | 1 . . | . . . | . 5 . |
 | . . 3 | . 1 . | 2 . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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tlanglet



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

PostPosted: Sun Jul 31, 2011 2:44 pm    Post subject: Reply with quote

I definitely worked hard on this puzzle; just couldn't find a move that provided major damage.

skyscraper (9)r17c5; r2c8, r8c7<>9
xy-wing (68-9)b9q48+r8c3; r9c2<>9
(9)r2c4=(9)r9c4-(9=8=7)r9c86-(7=6)r2c6; r2c4<>6
Type 1 UR(47)r23c48; r2c4=9

Ted
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sun Jul 31, 2011 4:09 pm    Post subject: Reply with quote

Another puzzle that seems to have a "tight" sequence of steps. Sorry!
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tlanglet



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

PostPosted: Sun Jul 31, 2011 7:37 pm    Post subject: Reply with quote

daj95376 wrote:
Another puzzle that seems to have a "tight" sequence of steps. Sorry!


Danny, you have absolutely nothing to be sorry about; everything within the classification is fair game Exclamation

Besides, I firmly believe that we do not want to find ourselves in the same situation as the Daily Sudoku VH puzzles where all are solved with a xy-wing. Variety is the spice of life....

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5124
Location: Rochester, NY, USA

PostPosted: Sun Jul 31, 2011 9:10 pm    Post subject: Reply with quote

A very enjoyable puzzle with a satisfying solution, even if I needed one more step than Ted.

Finned X-Wing; r1c5<>9
XY-Loop from r2c6 to r7c6; r8c6<>7, r9c4<>8, r7c5<>3, r4c6<>6
Type 1 UR (47); r2c4<>47
W-Wing (69), SL 6 in c6; r2c5, r89c4<>9
XY-Wing (689); r9c2<>9
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