X-treme Nov 25

Welcome to the world of the unknown. Each day you need to solve <a href="http://www.sudocue.net/xfile.php">two mysteries</a>.<br>Take the X-R-Size or solve the X-Treme problem. Stuck? Found a nice solution? Tell us about it.
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emm
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X-treme Nov 25

Post by emm »

There were a couple of Unique rectangles in this puzzle.

This is a particularly beautiful one :D

Code: Select all

+---------------+---------------+------------------+
| 59   249  6   | 8    3   247  | 4579  4579  1    | 
| 78   47   3   | 9    1   5    | 2     6     48   | 
| 589  1    29  | 24   6   247  | 59    3479  3489 | 
+---------------+---------------+------------------+
| 79   79   1   | 6    2   3    | 8     45*   45*  | 
| 2    6    4   | 5    8   9    | 3     1     7    | 
| 3    8    5   | 7    4   1    | 6     29    29   | 
+---------------+---------------+------------------+
| 6    3    29  | 1    7   8    | 459   2459* 2459*| 
| 1    29   8   | 234  5   24   | 479   2379  6    | 
| 4    5    7   | 23   9   6    | 1     8     23   | 
+---------------+---------------+------------------+
Am I right that you can't use the 29 / 29 only the 45 / 45?
Ruud
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Post by Ruud »

Both UR's avoid the diagonals and can be used AFAICS. :narrow:

The -45- UR has a type 3 elimination:

r7c89 must contain either a 2 or a 9 to avoid a deadly -45- pattern. r7c2 must contain either a 2 or a 9. You can eliminate 9 from r7c7, leaving 45.

This brings us to step 2 :D

r7c89 must contain either a 4 or a 5 to avoid the deadly -29- pattern. r7c7 must contain either 4 or 5. You can eliminate 4 from r8c7, leaving 79.

Those are 2 sequential UR3 moves. Too good to be true. You missed a locked candidates move that would eliminate 4 from r8c7.

Ruud
“If the human brain were so simple that we could understand it, we would be so simple that we couldn't.” - Emerson M Pugh
emm
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Post by emm »

I did miss that Ruud, because my eyes were set on the glittering prizes. FYI, I also ignored the hidden 5 in D/ which would have really taken the glisten off.

BTW thanks for the smiley WNE. I should have said so earlier but I didn’t because I didn't know how to say that it looks a bit cross without appearing ungrateful. If it had a straight mouth it would look more sly IMCO. :D
Ruud
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Post by Ruud »

If it had a straight mouth it would look more sly IMCO.
OK, you may need to refresh your browser to see the new image :narrow:

Ruud
“If the human brain were so simple that we could understand it, we would be so simple that we couldn't.” - Emerson M Pugh
emm
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Post by emm »

Actually I think it was the eyes that needed to be straight :roll:
Ruud
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Post by Ruud »

I give up :bart:
emm
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Post by emm »

That’s OK Ruud, if it’s too hard. :D

PS: The new one looks like a smiley WCP to me. :narrow:
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