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au tough 4/29/12

 
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Sun Apr 29, 2012 7:19 am    Post subject: au tough 4/29/12 Reply with quote
Code:

 *-----------*
 |..5|..1|...|
 |29.|4..|8..|
 |...|..6|.3.|
 |---+---+---|
 |3.7|...|...|
 |6..|.8.|..2|
 |...|...|3.6|
 |---+---+---|
 |.4.|1..|...|
 |..1|..5|.49|
 |...|2..|6..|
 *-----------*

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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Sun Apr 29, 2012 9:41 pm    Post subject: Reply with quote
Code:

 *--------------------------------------------------------------------*
 | 47    b36     5      | 8      239    1      | 29    c269    47     |
 | 2      9      36     | 4      357    37     | 8      1567   157    |
 | 147    178    48     | 579    2579   6      | 24579  3      457    |
 |----------------------+----------------------+----------------------|
 | 3      1258   7      | 569    14569  249    | 1459   589    458    |
 | 6      15     49     | 3579   8      3479   | 14579  579    2      |
 | 1459   1258   2489   | 579    14579  2479   | 3      5789   6      |
 |----------------------+----------------------+----------------------|
 | 579    4      26     | 1      679    789    | 257   d2578   3      |
 | 8     a26     1      | 367    367    5      | 7-2    4      9      |
 | 579    357    39     | 2      479    4789   | 6      1578   1578   |
 *--------------------------------------------------------------------*
m-wing
(2=6)r8c2-r1c2=(6-2)r1c8=(2)r7c8 => r8c7<>2; stte

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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun Apr 29, 2012 10:41 pm    Post subject: Reply with quote
Nice move Dan, wish I had found that. With a fairly long chain, r1c7=2-->r3c4=9; r1c5<>9, leaving us here:

Code:

+----------------+-----------------+-----------------+
| 47   36   5    | 8    23    1    | 29    269  47   |
| 2    9    36   | 4    357   37   | 8     1567 157  |
| 147  178  48   | 579  2579  6    | 2457  3    457  |
+----------------+-----------------+-----------------+
| 3    1258 7    | 569  14569 249  | 1459  589  458  |
| 6    15   49   | 3579 8     3479 | 14579 579  2    |
| 1459 1258 2489 | 579  14579 2479 | 3     5789 6    |
+----------------+-----------------+-----------------+
| 579  4    26   | 1    679   789  | 257   2578 3    |
| 8    26   1    | 367  367   5    | 27    4    9    |
| 579  357  39   | 2    479   4789 | 6     1578 1578 |
+----------------+-----------------+-----------------+

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XY-Wing (362), pivot r1c2, flightless, transport 2 from r1c5 to r7c8; r8c7<>2, same as your M-Wing elimination.
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