X-Treme Dec 23

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 Dec 23

Post by emm »

Just for the record I am actually having a little bit of trouble with X-Treme Dec 23 - but I'm sure I would be able to solve it if it wasn't Christmas and I had more time. :D

I'll have another go when all the eating and drinking is over. In the meantime thanks Ruud for lots of fun on your forum.

Happy Christmas from Downunder!
emm
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X-Treme Dec 23

Post by emm »

It has been fairly torrid getting to this point - I have used uniqueness and a lot of contradiction chains -

Code: Select all

 
 *--------------------------------------------------*
 | 2    14   134  | 7    9    5    | 8    34   6    |
 | 7    8    34   | 6    34   1    | 9    5    2    |
 | 9    5    6    | 38   2    48   | 34   7    1    |
 |----------------+----------------+----------------|
 | 36   13   15   | 9    56   28   | 7    28   4    |
 | 48   2    7    | 48   1    3    | 5    6    9    |
 | 46   9    58   | 248  56   7    | 1    28   3    |
 |----------------+----------------+----------------|
 | 5    6    9    | 23   8    24   | 34   1    7    |
 | 1    7    2    | 5    34   9    | 6    34   8    |
 | 38   34   48   | 1    7    6    | 2    9    5    |
 *--------------------------------------------------*
Almost a BUG but not quite. Any ideas?
sudokuEd
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Location: Sydney Australia

Post by sudokuEd »

An ALS move unlocks the puzzle emm 8-)

ALS(A=[r9c1,r4c6]B=[r356c4], X = 2, Z= 3) -> r3c7<>3

But I can't get as far as emm has. Any more ideas?

Code: Select all

.---------------.---------------.---------------.
| 234  1234 134 | 7    9    5   | 8    34   6   |
| 7    8    34  | 6    34   1   | 9    5    2   |
| 9    5    6   | 38   2    48  | 34   7    1   |
&#58;---------------+---------------+---------------&#58;
| 36   13   135 | 29   56   289 | 7    28   4   |
| 248  24   7   | 248  1    3   | 5    6    9   |
| 46   249  4589| 248  56   7   | 1    28   3   |
&#58;---------------+---------------+---------------&#58;
| 5    6    29  | 239  8    24  | 34   1    7   |
| 1    7    234 | 5    34   249 | 6    349  8   |
| 348  349  3489| 1    7    6   | 2    349  5   |
'---------------'---------------'---------------'
Last edited by sudokuEd on Fri Dec 29, 2006 3:32 am, edited 1 time in total.
Ruud
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Post by Ruud »

you could start with the X-Wing for digit 4 in r37c67...

then there is this nice loop:

[r9c1]-8-[r4c6]=8=[r3c6]=4=[r3c7]=3=[r9c1] => r9c1<>8

several singles bring you to this point:

Code: Select all

.------------.------------.------------.
| 2  1-34 134| 7   9   5  | 8  *34  6  |
| 7   8   34 | 6   34  1  | 9   5   2  |
| 9   5   6  | 38  2   48 |*34  7   1  |
&#58;------------+------------+------------&#58;
| 36  13  135| 9   56  28 | 7   28  4  |
| 8   2   7  | 4   1   3  | 5   6   9  |
| 46  9   45 | 28  56  7  | 1   28  3  |
&#58;------------+------------+------------&#58;
| 5   6   9  | 23  8   24 | 34  1   7  |
| 1   7   2  | 5   34  9  | 6   34  8  |
|*34 *34  8  | 1   7   6  | 2   9   5  |
'------------'------------'------------'
A remote pair using the diagonal causes a single 1 in r1c2.

That finally cracks it.

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 »

Very nice moves. Looks so easy when someone shows you how. Thanks!
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