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Puzzle 10/05/21: (C) BBDB XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri May 21, 2010 3:30 pm    Post subject: Puzzle 10/05/21: (C) BBDB XY Reply with quote
hint wrote:
M-Wing ... W-Wing ... or the UR method that Keith finds seldom productive.

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

Play this puzzle online at the Daily Sudoku site
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Luke451



Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California
PostPosted: Fri May 21, 2010 4:23 pm    Post subject: Reply with quote
Code:
 *-----------------------------------------------------------*
 | 7     45    36    | 9     2     36    | 8     45    1     |
 | 245   8     69    | 1     7     46    | 259   3     2456  |
 | 234   249   1     | 5     8     346   | 7     249   246   |
 |-------------------+-------------------+-------------------|
 | 9     6     2     | 3     5     8     | 4     1     7     |
 | 8     3     7     | 4     9     1     | 25    6     25    |
 |*145  *145  *45    | 2     6     7     | 3     8     9     |
 |-------------------+-------------------+-------------------|
 | 6    -29    8     | 7     4     5     | 1     29    3     |
 | 345   7     39    | 6     1     2     | 59    459   8     |
 |*145 *145+2 *45+2  | 8     3     9     | 6     7     245   |
 *-----------------------------------------------------------*

(145)MUG =>r7c2<>2=9

Then just for fun, a somewhat rare seven-link single guardian (aka Broken Wing):
Code:
 *-----------------------------------------------------------*
 | 7    *45    6     | 9     2     3     | 8    *45    1     |
 |*245   8     9     | 1     7     46    | 25    3     2456  |
 | 3     24    1     | 5     8     46    | 7     9     246   |
 |-------------------+-------------------+-------------------|
 | 9     6     2     | 3     5     8     | 4     1     7     |
 | 8     3     7     | 4     9     1     | 25    6     25    |
 | 145   145   45    | 2     6     7     | 3     8     9     |
 |-------------------+-------------------+-------------------|
 | 6     9     8     | 7     4     5     | 1     2     3     |
 |*45    7     3     | 6     1     2     | 9    *45    8     |
 | 12    12   *45    | 8     3     9     | 6     7    *45    |
 *-----------------------------------------------------------*

r2c1=2 to break up the DP.
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Fri May 21, 2010 6:11 pm    Post subject: Reply with quote
Gosh! My solution looks very prosaic in comparison... but enjoyable variety of steps..

Quote:
x-wing(9); r8c8<>9
skyscraper(4); r23c1<>4, rc2<>4
grouped kite(5); r8c1<>5
6-cell w-wing(25); (2=5)r2c1-r1c2=r1c8-r8c8=r8c7-(5=2)r5c7; r2c7<>2
xy-wing(259); r3c12<>2, r2c9<>2
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat May 22, 2010 4:22 pm    Post subject: Reply with quote
Another prosaic one.

X-Wing (9).
Skyscraper (4)
XYZ-Wing (259)
M-Wing (25)
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat May 22, 2010 5:48 pm    Post subject: Reply with quote
Luke451 wrote:
Then just for fun, a somewhat rare seven-link single guardian (aka Broken Wing):
Code:
 *-----------------------------------------------------------*
 | 7    *45    6     | 9     2     3     | 8    *45    1     |
 | 2-45  8     9     | 1     7     46    | 25    3     2456  |
 | 3     24    1     | 5     8     46    | 7     9     246   |
 |-------------------+-------------------+-------------------|
 | 9     6     2     | 3     5     8     | 4     1     7     |
 | 8     3     7     | 4     9     1     | 25    6     25    |
 | 145   1-45 @45    | 2     6     7     | 3     8     9     |
 |-------------------+-------------------+-------------------|
 | 6     9     8     | 7     4     5     | 1     2     3     |
 |@45    7     3     | 6     1     2     | 9    *45    8     |
 | 12    12   *45    | 8     3     9     | 6     7    *45    |
 *-----------------------------------------------------------*


I would have called it a (2x) 6-cell Remote Pair <45>.
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Luke451



Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California
PostPosted: Sat May 22, 2010 6:07 pm    Post subject: Reply with quote
daj95376 wrote:
Luke451 wrote:
Then just for fun, a somewhat rare seven-link single guardian (aka Broken Wing):
Code:
 *-----------------------------------------------------------*
 | 7    *45    6     | 9     2     3     | 8    *45    1     |
 | 2-45  8     9     | 1     7     46    | 25    3     2456  |
 | 3     24    1     | 5     8     46    | 7     9     246   |
 |-------------------+-------------------+-------------------|
 | 9     6     2     | 3     5     8     | 4     1     7     |
 | 8     3     7     | 4     9     1     | 25    6     25    |
 | 145   1-45 @45    | 2     6     7     | 3     8     9     |
 |-------------------+-------------------+-------------------|
 | 6     9     8     | 7     4     5     | 1     2     3     |
 |@45    7     3     | 6     1     2     | 9    *45    8     |
 | 12    12   *45    | 8     3     9     | 6     7    *45    |
 *-----------------------------------------------------------*


I would have called it a (2x) 6-cell Remote Pair <45>.

I thought about that, but decided that as a guardian the elim stuck out like a Type 1 UR.
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