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Puzzle NR 09/11/30 (B)

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Nov 30, 2009 2:30 pm    Post subject: Puzzle NR 09/11/30 (B) Reply with quote
Code:
 +-----------------------+
 | 5 . . | . . . | 7 . . |
 | . 3 7 | 6 9 . | . 2 . |
 | . 9 . | . . . | 1 . . |
 |-------+-------+-------|
 | . 5 . | 7 . . | . . . |
 | . 8 . | . . 4 | . . . |
 | . . . | . 5 8 | 9 . 3 |
 |-------+-------+-------|
 | 8 . 5 | . . 7 | 6 . . |
 | . 2 . | . . . | . 7 . |
 | . . . | . . 6 | . . 9 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Mon Nov 30, 2009 11:55 pm    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
| 5      146    2     | 148    148    3     | 7      9      46    |
| 14     3      7     | 6      9      15    | 458    2      458   |
| 46     9      8     | 45     7      2     | 1      3      456   |
:---------------------+---------------------+---------------------:
| 12346  5      1346  | 7      126    9     | 248    1468   148   |
| 1269   8      169   | 3      126    4     | 25     156    7     |
| 12467  1467   146   | 12     5      8     | 9      146    3     |
:---------------------+---------------------+---------------------:
| 8      14     5     | 9      3      7     | 6      14     2     |
| 69     2      69    | 1458   148    15    | 3      7      1458  |
| 1347   147    134   | 12458  1248   6     | 458    1458   9     |
'---------------------'---------------------'---------------------'

does not matter which order you apply the following moves. but, there is one fewer elimination of the 1's in box 8 if you apply the xy-wing first. and if you apply the move on 1's first, then the last node in that chain below would include (1)r9c2

(4=1)r2c1 - (1=5)r2c6 - (5=4)r3c4

(1)r8c6 = (1)r2c6 - (1)r2c1 = (1)r1c2 - (1)r7c2 = (1)r9c13
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Dec 02, 2009 12:01 am    Post subject: Reply with quote
I used an XY-Wing (154), Remote Pairs (14)*** and coloring on 1.

***I can't remember if I used this technique once or twice.
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Dec 02, 2009 2:25 am    Post subject: Reply with quote
Marty R. wrote:
I used an XY-Wing (154), Remote Pairs (14)*** and coloring on 1.

***I can't remember if I used this technique once or twice.

Once or twice is definitely possible. The same RP cells result in eliminations in two cells.

Code:
 +--------------------------------------------------------------+
 |  5    B14    2     |  148   48    3     |  7     9     6     |
 | G14    3     7     |  6     9     15    |  458   2     458   |
 |  6     9     8     |  45    7     2     |  1     3     45    |
 |--------------------+--------------------+--------------------|
 |  23-14 5     134   |  7     16    9     |  248   68    148   |
 |  12    8     9     |  3     16    4     |  25    56    7     |
 |  7     6    B14    |  2     5     8     |  9    G14    3     |
 |--------------------+--------------------+--------------------|
 |  8    G14    5     |  9     3     7     |  6    B14    2     |
 |  9     2     6     |  1458  48    15    |  3     7     1458  |
 |  134   7     3-14  |  1458  2     6     |  458   58    9     |
 +--------------------------------------------------------------+
 # 49 eliminations remain
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Fri Dec 04, 2009 7:56 pm    Post subject: Reply with quote
Like Marty, I started with the xy-wing 1-45. Then it was a skyscraper on 1 rather that a Remote Pair, but I also finished with coloring on 1.

Ted
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