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Sept 16 VH

 
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Wed Sep 16, 2015 1:11 pm    Post subject: Sept 16 VH Reply with quote
After basics:
Code:

+----------+--------+----------+
| 26  5 8  | 4 9  7 | 12 16 3  |
| 246 7 9  | 3 26 1 | 8  5  46 |
| 1   3 46 | 8 26 5 | 24 7  9  |
+----------+--------+----------+
| 8   4 2  | 1 5  3 | 6  9  7  |
| 5   6 1  | 7 4  9 | 3  8  2  |
| 7   9 3  | 2 8  6 | 14 14 5  |
+----------+--------+----------+
| 3   8 46 | 9 7  2 | 5  46 1  |
| 9   2 5  | 6 1  4 | 7  3  8  |
| 46  1 7  | 5 3  8 | 9  2  46 |
+----------+--------+----------+

Play this puzzle online at the Daily Sudoku site
Once again, not hard to see the 3 one-step 'VH' solutions:
Quote:
46-2 XY-Wing pivot r3c7; 24-6 XY-Wing pivot r2c9;
46-2 XY-Wing pivot r3c3. Also 2 W wings on 26 and 46


Hugh
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Thu Sep 17, 2015 5:34 pm    Post subject: Sep 16 VH Reply with quote
Code:

+----------+--------+----------+
| 26  5 8  | 4 9  7 | 12 16 3  |
| 246 7 9  | 3 26 1 | 8  5  46 |
| 1   3 46 | 8 26 5 | 24 7  9  |
+----------+--------+----------+
| 8   4 2  | 1 5  3 | 6  9  7  |
| 5   6 1  | 7 4  9 | 3  8  2  |
| 7   9 3  | 2 8  6 | 14 14 5  |
+----------+--------+----------+
| 3   8 46 | 9 7  2 | 5  46 1  |
| 9   2 5  | 6 1  4 | 7  3  8  |
| 46  1 7  | 5 3  8 | 9  2  46 |
+----------+--------+----------+
BUG+1; r2c1=6
Also: (4=6)r9c1-r1c1=r1c8-(6=4)r7c8 => -4r9c9; stte
Single's chains on 6: (6)r7c3=r3c3-r3c5=r2c5-r2c9=(6)r9c9 => -6r7c8; stte
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Sep 17, 2015 7:38 pm    Post subject: Reply with quote
Another chain of 6s, Simple Coloring

-r9c1=r9c9-r2c9=r1c8=> -6r1c1.
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