X-treme 22 Nov ALSxz!!

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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sudokuEd
Grandmaster
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Posts: 257
Joined: Mon Jun 19, 2006 11:06 am
Location: Sydney Australia

X-treme 22 Nov ALSxz!!

Post by sudokuEd »

Found one emm! So excited - can hardly typex. :D

After very slow progress, managed to get today's X-treme to this spot - then completely stuck. Think I've found an ALSxz elimination which solves the puzzle. Please don't let me be tricked again :wink: .

A =[r4c147], B=[r4c9, r5c8, r6c9], X=1, Z=9 =>[r4c8]<>9

Code: Select all

.------------.------------.------------.
| 3   9   4  | 6   1   2  | 57  57  8  |
| 6   8   7  | 5   4   3  | 19  2   19 |
| 5   1   2  | 79  8   79 | 4   6   3  |
&#58;------------+------------+------------&#58;
| 78  4   5  | 79  23  6  | 18  39  127|
| 2   3   1  | 8   5   79 | 6   79  4  |
| 78  6   9  | 1   23  4  | 58  35  27 |
&#58;------------+------------+------------&#58;
| 1   2   3  | 4   6   5  | 79  8   79 |
| 4   7   6  | 2   9   8  | 3   1   5  |
| 9   5   8  | 3   7   1  | 2   4   6  |
'------------'------------'------------'
emm
Hooked
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Post by emm »

Eureka, Ed! That looks like a bona fide ALS to me.Image

There is another way of getting past that stage though ... she says mysteriously... 8-)
emm
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Posts: 34
Joined: Wed Oct 11, 2006 6:01 pm

X-treme 24 Nov

Post by emm »

It's an infestation!

Code: Select all

.------------.------------.------------.
| 2   4   1  | 58  578 57 | 9   3   6  |
| 9   5   6  | 3   2   4  | 8   1   7  |
| 7   3   8  | 1   6   9  | 5   4   2  |
&#58;------------+------------+------------&#58;
| 3   8   5  | 7   1   2  | 4   6   9  |
| 6   2   9  | 58  4   3  | 7   58  1  |
| 4   1   7  | 9   58  6  | 3   2   58 |
&#58;------------+------------+------------&#58;
| 5   6   3  | 2   9   78 | 1   78  4  |
| 1   7   4  | 6   3   58 | 2   9   58 |
| 8   9   2  | 4   57  1  | 6   57  3  |
'------------'------------'------------'
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