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Set H Puzzle 79 -- multi-step VH

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Wed Jan 14, 2009 9:46 pm    Post subject: Set H Puzzle 79 -- multi-step VH Reply with quote

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

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/or one Extreme step.

Extreme+: Swordfish, Jellyfish, (but mostly) Chain
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Marty R.



Joined: 12 Feb 2006
Posts: 5063
Location: Rochester, NY, USA

PostPosted: Sat Jan 17, 2009 10:32 pm    Post subject: Reply with quote

I found this one pretty stubborn. W-Wing, XY-Chain, same W-Wing with pincer transport, then nothing I could see in my arsenal, so I finished it with a BUG+3.
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Sun Jan 18, 2009 2:57 am    Post subject: Reply with quote

xy-wing removes some 1's in r23
xy-wing removes 2 in r8c7
w-wing {2,9}
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