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Set VH_2 Puzzle 48

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Tue Mar 17, 2009 12:58 pm    Post subject: Set VH_2 Puzzle 48 Reply with quote
VH (including XYZ-Wing)

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

Play this puzzle online at the Daily Sudoku site

Code:
 r6  b6  Locked Candidate 2              <> 4    [r4c7],[r5c9]

         XYZ-Wing [r1c4]/[r1c8]+[r2c4]   <> 2    [r1c56]

   c4b2  Locked Candidate 1              <> 2    [r4c4]
 r4      Naked  Pair                     <> 49   [r4c7]

         UR Type 1 [r46c27]              <> 25   [r6c7]

         XY-Wing  [r2c7]/[r1c8]+[r6c7]   <> 9    [r3c7]   sufficient
         XY-Wing  [r3c7]/[r1c8]+[r4c7]   <> 2    [r2c7]


Last edited by daj95376 on Tue Apr 07, 2009 2:45 pm; edited 1 time in total
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Wed Mar 18, 2009 3:50 pm    Post subject: Reply with quote
My first pass at this puzzle was a two step solution without the xyz-wing.
Quote:
xy-wing359 with pivot <35> in r3c6 and pseudo-cell <39> in r8c69 deletes <9s> from r13c9
This sets up a kite9 with hinge in box2 that makes a deletion in r4c7. Then transport pincer r3c7 to r9c8 via r1c8 and pincer r4c4 to r5c3 via r4c1 to delete <9> from r9c3 and complete the puzzle.

Ted
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