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Free Press Dec 18, 2009

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keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Mon Dec 21, 2009 6:27 pm Post subject: Free Press Dec 18, 2009

Code:

Puzzle: FP121809
+-------+-------+-------+
| . . 1 | . . . | . 8 9 |
| . . . | . . . | 6 . 1 |
| 7 . . | . . 2 | . . . |
+-------+-------+-------+
| . . . | 2 8 . | . 9 . |
| . . . | . 5 . | . . . |
| . 7 . | . 9 4 | . . . |
+-------+-------+-------+
| 8 . . | 6 . . | . . 4 |
| 2 . 3 | . . . | . . . |
| 4 9 7 | . . 1 | 2 . . |
+-------+-------+-------+

(There is a one-stepper.)

Keith

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Tue Dec 22, 2009 12:53 pm Post subject:

Two versions of a one stepper.

Quote:

I initially found a xy-wing 1-36 with vertex 16 in r4c1, pincer 13 in r4c6 and pincer 36 a psedudocell in r6c14.

Then I realized that both pincers cells were bivalue cells <13> that formed a w-wing with a strong link on 1 in col1 to make the same deletions as the xy-wing.

Ted

keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Wed Dec 23, 2009 9:02 pm Post subject:

Ted, I found the W-wing. There are also a couple of irrelevant UR eliminations. Keith

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