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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

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

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?

dongrave

Joined: 06 Mar 2014
Posts: 572

Posted: Sun Sep 25, 2016 10:05 pm Post subject:

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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