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Puzzle 10/06/15: (B) Turbot

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Tue Jun 15, 2010 2:49 pm    Post subject: Puzzle 10/06/15: (B) Turbot Reply with quote
Code:
 +-----------------------+
 | . 3 . | . . 9 | . . 8 |
 | 7 . . | . 8 . | . . 2 |
 | . . 5 | . . 4 | 3 6 . |
 |-------+-------+-------|
 | 5 . . | 7 . . | . . . |
 | . 6 9 | . 4 . | . . . |
 | . . 2 | . . 6 | . . . |
 |-------+-------+-------|
 | . . 6 | . . . | . 5 . |
 | . . 7 | . . . | 4 8 . |
 | 9 4 . | . . . | . . 6 |
 +-----------------------+

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Code:
 after basics
 +--------------------------------------------------------------+
 |  6     3     14    |  25    25    9     |  17    147   8     |
 |  7     9     14    |  6     8     3     |  5     14    2     |
 |  28    28    5     |  1     7     4     |  3     6     9     |
 |--------------------+--------------------+--------------------|
 |  5     18    38    |  7     1239  128   |  6     1239  4     |
 |  138   6     9     |  2358  4     1258  |  1278  1237  1357  |
 |  4     7     2     |  358   1359  6     |  18    139   135   |
 |--------------------+--------------------+--------------------|
 |  1238  128   6     |  4     123   1278  |  9     5     137   |
 |  123   5     7     |  9     6     12    |  4     8     13    |
 |  9     4     38    |  358   135   1578  |  127   1237  6     |
 +--------------------------------------------------------------+
 # 76 eliminations remain
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Thu Jun 17, 2010 8:36 am    Post subject: Reply with quote
Multiple skyscrapers do the job - many more extraneous eliminations on 1 possible
Quote:
type 1 UR; r1c8=7
skyscraper(8); r4c6<>8, r5c1<>8
skyscraper(1); r7c5<>1, r8c1<>1
xy-wing(123) r8c6; r7c9<>3
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Jun 17, 2010 3:32 pm    Post subject: Reply with quote
Suffice it to say that I solved this with standard techniques, but it took me eight moves.
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Thu Jun 17, 2010 3:47 pm    Post subject: Reply with quote
Lots of extraneous steps possible, but ...

Code:
 r12c38  <14> UR Type 1.2223             r1c8<>14

 c34r9   Skyscraper                      <> 8    r4c6,r5c1

 c26r4   Skyscraper                      <> 1    r7c5,r8c1

 <12+3>  XY-Wing  r8c6/r7c5+r8c9         <> 3    r7c9
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