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Set J Puzzle 52 -- multi-step VH

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Tue Jan 20, 2009 5:44 pm    Post subject: Set J Puzzle 52 -- multi-step VH Reply with quote
Code:
 +-----------------------+
 | 8 4 . | . 9 3 | . 7 . |
 | 3 . . | . 6 4 | . 8 . |
 | . . 7 | . . . | . . 9 |
 |-------+-------+-------|
 | . . . | . . . | . . . |
 | 4 9 . | . 7 . | 8 5 . |
 | 7 1 . | . . 6 | . . 4 |
 |-------+-------+-------|
 | . . . | . 4 . | . 6 . |
 | 9 2 . | . 1 . | 7 . . |
 | . . 4 | . . 8 | . . 1 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== =====

Can be solved using steps from ...

Basics: Naked/Hidden Single, Naked Pair/Triple, Locked Candidate 1/2

Basics+: Naked Quad, Hidden Pair/Triple/Quad

VH: BUG+1, Remote Pair, UR Type 1, X-Wing, XY-Wing

Advanced: 2-String Kite, Empty Rectangle, Skyscraper, UR Type 2, XYZ-Wing

Extreme: finned X-Wing, Multiple Colors, M-Wing, W-Wing, XY-Chain

VH+AE: multi-step VH plus one Advanced and one Extreme step.

Extreme+: Swordfish, Jellyfish, (but mostly) Chain

Code:
 r1  b3  Naked  Pair                     <> 56   [r1c4]
 r3      Naked  Pair                     <> 12   [r3c45]

 r7      Naked  Quad                     <> 1358 [r7c47]

     b9  Naked  Pair                     <> 29   [r9c7]

   c4    Hidden Pair                     =  58   [r36c4]

         UR Type 1 [r36c45]              <> 58   [r6c5]

   c5    Naked  Pair                     <> 23   [r4c5]
 r6      Naked  Triple                   <> 239  [r6c3]

   c58   X-Wing                          <> 2    [r6c7],[r9c4]

         2-String Kite                   <> 2    [r5c3]

 r5      Naked  Pair                     <> 36   [r5c4]

         XY-Wing  [r9c7]/[r4c7]+[r9c1]   <> 6    [r4c1]
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wapati



Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
PostPosted: Fri Jan 30, 2009 4:34 pm    Post subject: Reply with quote
I can do this with a remote pair 12 followed by a 356 xy-wing of the rectangular sort. Smile
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