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Sep 25 VH how do I get a 2 in r6c9?

 
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pbreinhart



Joined: 21 Sep 2007
Posts: 9
Location: Atlanta, GA

PostPosted: Sun Sep 25, 2016 9:44 pm    Post subject: Sep 25 VH how do I get a 2 in r6c9? Reply with quote

Code:

+----------+-----------+--------------+
| 3 5  6   | 128 9  12 | 28  7   4    |
| 8 29 4   | 26  7  5  | 239 1   2369 |
| 7 29 1   | 4   68 3  | 5   268 269  |
+----------+-----------+--------------+
| 1 7  5   | 9   2  8  | 34  46  36   |
| 2 6  89  | 3   1  4  | 89  5   7    |
| 4 38 389 | 7   5  6  | 1   28  2    |
+----------+-----------+--------------+
| 9 1  2   | 5   4  7  | 6   3   8    |
| 5 38 378 | 268 68 9  | 247 24  1    |
| 6 4  78  | 128 3  12 | 27  9   5    |
+----------+-----------+--------------+

Play this puzzle online at the Daily Sudoku site

Originally there was a 29 in that spot. How does one get a 2 there?
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dongrave



Joined: 06 Mar 2014
Posts: 563

PostPosted: Sun Sep 25, 2016 10:05 pm    Post subject: Reply with quote

You apply Hugh's 89-2 XY Wing with pivot at r5c7 which eliminates the 2 from r2c9 and r3c9 leaving the only 2 in column 9 in r6c9.
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