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Free Press March 30, 2012

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat Mar 31, 2012 3:19 pm    Post subject: Free Press March 30, 2012 Reply with quote
Not yet started ...
Code:
Puzzle: FP033012
+-------+-------+-------+
| . . 3 | . . 4 | . . . |
| . 4 . | . 1 5 | . . 9 |
| . 2 . | . 6 . | . 4 . |
+-------+-------+-------+
| 9 . . | . . . | 1 5 . |
| 4 . . | 8 . 3 | . . 2 |
| . 7 6 | . . . | . . 8 |
+-------+-------+-------+
| . 1 . | . . . | . 9 . |
| . . . | 7 3 . | . 1 . |
| . . . | 5 . . | 2 . . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

Keith
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Sat Mar 31, 2012 3:50 pm    Post subject: Free Press March 30, 2012 Reply with quote
W-Wing 68 with SL 8 in col 8; r1c2<>6 solves it.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Mar 31, 2012 4:53 pm    Post subject: Reply with quote
Same.
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat Mar 31, 2012 6:06 pm    Post subject: Reply with quote
After basics:
Code:
+-------------------+-------------------+-------------------+
|a156   69    3     | 29    8     4     | 567   27   d156   |
| 68    4     7     | 23    1     5     | 368   28    9     |
|b158   2     59    | 39    6     7     | 358   4    c135   |
+-------------------+-------------------+-------------------+
| 9     3     8     | 46    24    26    | 1     5     7     |
| 4     5     1     | 8     7     3     | 9     6     2     |
| 2     7     6     | 1     5     9     | 4     3     8     |
+-------------------+-------------------+-------------------+
| 37    1     25    | 46    24    268   | 35678 9    *356   |
|*56    689   259   | 7     3     268   | 568   1     4     |
| 37    68    4     | 5     9     1     | 2     78    36    |
+-------------------+-------------------+-------------------+

Look at the UR 15. Either ab is a pseudocell 68, or cd is a pseudocell 36. The cells marked * are pincers on 5.

Also, there is a deadly pattern 246 in R47. R7C6 must be 8.

Neither solves it ...


Keith
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Luke451



Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California
PostPosted: Sat Mar 31, 2012 6:59 pm    Post subject: Reply with quote
keith wrote:
After basics:
Code:
+-------------------+-------------------+-------------------+
|a156   69    3     | 29    8     4     | 567   27   d156   |
| 68    4     7     | 23    1     5     | 368   28    9     |
|b158   2     59    | 39    6     7     | 358   4    c135   |
+-------------------+-------------------+-------------------+
| 9     3     8     | 46    24    26    | 1     5     7     |
| 4     5     1     | 8     7     3     | 9     6     2     |
| 2     7     6     | 1     5     9     | 4     3     8     |
+-------------------+-------------------+-------------------+
| 37    1     25    | 46    24    268   | 35678 9    *356   |
|*56    689   259   | 7     3     268   | 568   1     4     |
| 37    68    4     | 5     9     1     | 2     78    36    |
+-------------------+-------------------+-------------------+

Look at the UR 15. Either ab is a pseudocell 68, or cd is a pseudocell 36. The cells marked * are pincers on 5.

Also, there is a deadly pattern 246 in R47. R7C6 must be 8.

Funny you should point those out. They're exactly the first things I looked at as well.

I saw the *5's as "external outs" that proved r7c3<>5. Also, (5)r3c3=(5)r7c9 does the same thing, but zaps (5)r3c9 as well (also fruitless.)

The 246 DP is a Type 1 BUG-Lite.

This concludes my observations on how not to solve this puzzle Very Happy
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Sat Mar 31, 2012 7:59 pm    Post subject: Reply with quote
Code:
 *--------------------------------------------------------------------*
 | 156   b69     3      |a29     8      4      | 567    7-2    156    |
 |c68     4      7      | 3-2    1      5      | 368   d28     9      |
 | 158    2      59     | 39     6      7      | 358    4      135    |
 |----------------------+----------------------+----------------------|
 | 9      3      8      | 46     24     26     | 1      5      7      |
 | 4      5      1      | 8      7      3      | 9      6      2      |
 | 2      7      6      | 1      5      9      | 4      3      8      |
 |----------------------+----------------------+----------------------|
 | 37     1      25     | 46     24     268    | 35678  9      356    |
 | 56     689    259    | 7      3      268    | 568    1      4      |
 | 37     68     4      | 5      9      1      | 2      78     36     |
 *--------------------------------------------------------------------*
xy-chain
(2=9)r1c4-(9=6)r1c2-(6=8)r2c1-(8=2)r2c8 => r1c8,r2c4<>2

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