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Free Press, Jan 16, 2009

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Fri Jan 16, 2009 12:30 pm    Post subject: Free Press, Jan 16, 2009 Reply with quote
Code:
Puzzle: FP011609
+-------+-------+-------+
| 6 . . | . . . | 9 . . |
| 1 . 2 | . . 6 | 3 . . |
| . 5 . | . 1 . | . . 6 |
+-------+-------+-------+
| . . 5 | 9 7 . | . . . |
| . 7 . | . 2 . | . 3 . |
| . . . | . . 8 | 1 . . |
+-------+-------+-------+
| 7 . . | . 4 . | . 9 . |
| . . 6 | 3 . . | 8 . 2 |
| . . 3 | . . . | . . 7 |
+-------+-------+-------+
Another unreasonable one?

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Fri Jan 16, 2009 7:42 pm    Post subject: Reply with quote
Quote:
Another unreasonable one?

Yes for me. I used five ERs, then hit the brick wall. Extended Medusa forced one placement and that opened the floodgates.
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Asellus



Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA
PostPosted: Fri Jan 16, 2009 11:11 pm    Post subject: Reply with quote
This one requires at least two-cluster Medusa. After a 6 X-Wing and a 3 Finned X-Wing or ER, Medusa coloring beginning on <6> coupled with a conjugate pair of <1>s reveals this short AIC:

(6)r4c2 - (6=3)r6c2 - (3)r6c5=(3-1)r4c6=(1-6)r4c2; r4c2<>6

This solves the puzzle. (There are some other Finned X-Wings/ERs present before the AIC, but they don't advance the puzzle.)
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