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Puzzle 10/09/29: A

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Sep 29, 2010 4:22 pm    Post subject: Puzzle 10/09/29: A Reply with quote
Code:
 +-----------------------+
 | . . . | . . 9 | 3 . . |
 | . . . | 7 . 3 | . 9 . |
 | . . 3 | . 2 4 | . 7 1 |
 |-------+-------+-------|
 | . 1 . | 3 . . | . . . |
 | . . 8 | . 1 2 | . . 9 |
 | 2 6 4 | . 8 5 | 1 . 7 |
 |-------+-------+-------|
 | 1 . . | . . 8 | 7 . . |
 | . 8 7 | . . . | . 2 . |
 | . . 2 | . 3 7 | . . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Sep 30, 2010 4:04 am    Post subject: Reply with quote
Quote:
M-Wing (56), flightless with pincer transport
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Thu Sep 30, 2010 2:07 pm    Post subject: Reply with quote
I decided to implement Remote Pair as an XY-Chain for each candidate value. Then manually merge the results. When's the last time you encountered an 8-cell Remote Pair that's a single-stepper?

Code:
 after basics
 +--------------------------------------------------------------+
 |  478   247  *56    |  1    *56    9     |  3     48    248   |
 |  48    24    1     |  7    *56    3     |  248   9    *56    |
 |  569   59    3     |  8     2     4     | *56    7     1     |
 |--------------------+--------------------+--------------------|
 |  59    1     59    |  3     7     6     |  248   48    248   |
 |  37    37    8     |  4     1     2     | *56   *56    9     |
 |  2     6     4     |  9     8     5     |  1     3     7     |
 |--------------------+--------------------+--------------------|
 |  1     3459  9-56  |  2     49    8     |  7    *56    3456  |
 |  356   8     7     |  56    49    1     |  49    2     356   |
 |  4569  459   2     |  56    3     7     |  489   1     4568  |
 +--------------------------------------------------------------+
 # 58 eliminations remain

 RP <56>: r1c35 + r2c59 + r35c7 + r57c8  =>  r7c3<>56
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Sep 30, 2010 4:29 pm    Post subject: Reply with quote
Quote:
When's the last time you encountered an 8-cell Remote Pair that's a single-stepper?

I don't know if I've ever had one. If my grid was the same, I obviously missed it or maybe just didn't look past the first three 56 cells that I saw.
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