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Puzzle 10/10/05: B Advanced

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Oct 04, 2010 9:48 pm    Post subject: Puzzle 10/10/05: B Advanced Reply with quote
Code:
 +-----------------------+
 | 4 . 3 | . . . | . . . |
 | . 2 . | 3 9 . | . . . |
 | 1 . 9 | 7 . 4 | . . 3 |
 |-------+-------+-------|
 | . 6 2 | . 1 . | 7 . . |
 | . 1 . | 5 6 . | . 2 . |
 | . . 7 | . . . | 1 . . |
 |-------+-------+-------|
 | . . . | 9 . 6 | 2 1 4 |
 | . . . | . 7 . | 5 3 . |
 | . . 1 | . . . | 8 . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Tue Oct 05, 2010 1:19 am    Post subject: Reply with quote
Three fun steps.........

Quote:
Flightless xy-wing as an AIC: (6=8)r8c3-(8=2)r8c6-r9c46=(2-6)r9c1=(6)r9c8; r8c9,r9c1<>6
xy-wing 3-49 vertex (39)r4c6; r4c4,r6c8<>4
RP (58)r7c3,r7c5,r1c5,r2c6; r2c3<>58=6

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Tue Oct 05, 2010 4:38 am    Post subject: Reply with quote
As is often the case, I didn't finesse this puzzle, I bulldozed it with a dozen moves or so, using assorted wings, ERs, coloring and XY-Chain.
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Tue Oct 05, 2010 2:39 pm    Post subject: Reply with quote
Three steps also... seemed to end up in the same place as Ted...
Quote:
(9)r9c2=AHP(29-6)r89c1=(6)r8c3 - (6=9)r8c9 ; r9c8<>9, r8c1<>9
xy-wing(48-3) r4c4 ; r4c6<>3, r6c12<>3
RP(58) r7c3, r2c6 ; r2c3<>58=6
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