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Jan 28 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1007
Location: Dar es Salaam Tanzania

PostPosted: Wed Jan 27, 2016 10:53 pm    Post subject: Jan 28 VH Reply with quote

Code:

+----------+-------+------------+
| 3  5  9  | 1 2 6 | 47 47  8   |
| 7  4  1  | 5 8 9 | 2  6   3   |
| 8  2  6  | 4 7 3 | 1  9   5   |
+----------+-------+------------+
| 9  17 27 | 6 4 8 | 5  3   127 |
| 14 3  5  | 2 9 7 | 6  8   14  |
| 24 6  8  | 3 1 5 | 47 247 9   |
+----------+-------+------------+
| 12 17 3  | 8 6 4 | 9  5   27  |
| 5  9  4  | 7 3 2 | 8  1   6   |
| 6  8  27 | 9 5 1 | 3  247 247 |
+----------+-------+------------+

Finned x-wing on 2 in r49, (fin r9c8); r7c9 <> 2; stte
W-Wing [27]r4c3, r7c9 with SL 7 in col 2; r4c9<>2;stte
Also UR47 r16c78; r6c8 <> 47; stte
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hughwill



Joined: 05 Apr 2010
Posts: 414
Location: Birmingham UK

PostPosted: Thu Jan 28, 2016 4:01 pm    Post subject: Reply with quote

In Clement's diagram the 7 can be removed from r4c9 by box-line
reduction. This leaves a classic 27-1 (or 17-2) XY-Wing pivot r4c9 (or
r7c9) which does it in one.

Also there's a second 27 W-wing r7c9 and r9c3 on 2s in r4 removing
7s in r9c89 stte.

For so few possibles, not bad!

Hugh
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Fri Jan 29, 2016 12:34 am    Post subject: Reply with quote

Also a BUG+3 which I haven't tested. (
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