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.
emm
Hooked
Posts: 34 Joined: Wed Oct 11, 2006 6:01 pm
Post
by emm » Sun Nov 26, 2006 5:39 pm
There were a couple of Unique rectangles in this puzzle.
This is a particularly beautiful one
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
Site Owner
Posts: 601 Joined: Fri Dec 30, 2005 10:21 pm
Post
by Ruud » Sun Nov 26, 2006 9:11 pm
Both UR's avoid the diagonals and can be used AFAICS.
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
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
Hooked
Posts: 34 Joined: Wed Oct 11, 2006 6:01 pm
Post
by emm » Mon Nov 27, 2006 5:37 pm
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.
Ruud
Site Owner
Posts: 601 Joined: Fri Dec 30, 2005 10:21 pm
Post
by Ruud » Mon Nov 27, 2006 7:16 pm
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
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
Hooked
Posts: 34 Joined: Wed Oct 11, 2006 6:01 pm
Post
by emm » Mon Nov 27, 2006 7:27 pm
Actually I think it was the eyes that needed to be straight
Ruud
Site Owner
Posts: 601 Joined: Fri Dec 30, 2005 10:21 pm
Post
by Ruud » Mon Nov 27, 2006 8:01 pm
I give up
emm
Hooked
Posts: 34 Joined: Wed Oct 11, 2006 6:01 pm
Post
by emm » Tue Nov 28, 2006 10:08 am
That’s OK Ruud, if it’s too hard.
PS: The new one looks like a smiley WCP to me.