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BB December 29

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sideli123

Joined: 20 Dec 2005
Posts: 7

Posted: Tue Dec 30, 2008 3:34 am Post subject: BB December 29

Has anyone been able to solve the BB December 29 Super hard?[/code]

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Tue Dec 30, 2008 10:25 am Post subject:

Code:

. . 9 | . . . | 2 . .
. . 4 | 6 . 8 | 7 . .
6 7 . | . . . | . 8 4
-------+-------+------
. 2 . | 9 . 4 | . 7 .
. . . | . 5 . | . . .
. 6 . | 8 . 3 | . 5 .
-------+-------+------
7 4 . | . . . | . 3 8
. . 3 | 1 . 7 | 6 . .
. . 6 | . . . | 9 . .

Code:

.---------------------.---------------------.---------------------.
| 1358 1358 9 | 47 47 15 | 2 16 1356 |
| 1235 135 4 | 6 123 8 | 7 19 1359 |
| 6 7 125 | 235 1239 1259 | 135 8 4 |
:---------------------+---------------------+---------------------:
| 135 2 158 | 9 16 4 | 138 7 136 |
| 1349 139 178 | 27 5 126 | 1348 1269 12369 |
| 149 6 17 | 8 127 3 | 14 5 129 |
:---------------------+---------------------+---------------------:
| 7 4 125 | 25 69 69 | 15 3 8 |
| 2589 589 3 | 1 48 7 | 6 24 25 |
| 1258 158 6 | 34 348 25 | 9 124 7 |
'---------------------'---------------------'---------------------'

this is fun, not.

Quote:

x-wing 5
x-wing 1
x-wing 1
then three xy-wings, all removing 1's

Asellus

Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA

Posted: Fri Jan 02, 2009 3:42 am Post subject:

After that first x-wing, there is a W-Wing (which can also be seen as an M-Wing):

Code:

+----------------+---------------+------------------+
| 1358 1358 9 | 4 7 15 | 2 16 1356 |
| 1235 135 4 | 6 123 8 | 7 19 1359 |
| 6 7 12 | 25 1239 129 | 135 8 4 |
+----------------+---------------+------------------+
| 13 2 5 | 9 16 4 | 8 7 136 |
| 1349 139 8 | 7 5 e126 | 134 1269 12369 |
| 149 6 7 | 8 f12 3 | 14 5 #19-2 |
+----------------+---------------+------------------+
| 7 4 12 |c25 69 69 |b15 3 8 |
| 2589 589 3 | 1 48 7 | 6 24 a25 |
| 1258 158 6 | 3 48 d25 | 9 #14-2 7 |
+----------------+---------------+------------------+

It is located at abcd: a and/or d must be <2>, eliminating <2> at r9c8. The pincer at d can be transported via e to f, eliminating <2> at r6c9. This solves the puzzle.

PS: I believe the second step in Norm's path is an X-Wing on 2.

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