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Free Press Thursday March 26, 2009

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Thu Mar 26, 2009 11:40 pm    Post subject: Free Press Thursday March 26, 2009 Reply with quote

I pride myself on doing these without pencil marks. This one had me stumped for hours!

No advanced moves required.

Code:
Puzzle: FP032609Thu
+-------+-------+-------+
| 8 . . | 4 . . | . . . |
| . . 9 | . . . | 6 1 . |
| . . 3 | . . 1 | 8 . 2 |
+-------+-------+-------+
| . 5 . | . . . | . . . |
| . . . | 2 5 8 | . . 3 |
| . . . | . . . | . 9 . |
+-------+-------+-------+
| 9 . 7 | 5 . . | 1 . . |
| . 6 1 | . . 4 | 9 . . |
| . . . | . . 3 | . . 6 |
+-------+-------+-------+


Keith
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Fri Mar 27, 2009 1:27 am    Post subject: Reply with quote

Code:
.---------------------.---------------------.---------------------.
| 8      1      256   | 4      267    2567  | 3      57     9     |
| 2457   247    9     | 378    2378   257   | 6      1      457   |
| 4567   47     3     | 679    679    1     | 8      457    2     |
:---------------------+---------------------+---------------------:
| 23467  5      2468  | 1367   13467  9     | 24     2468   148   |
| 1      9      46    | 2      5      8     | 47     467    3     |
| 23467  23478  2468  | 1367   13467  67    | 245    9      1458  |
:---------------------+---------------------+---------------------:
| 9      2348   7     | 5      268    26    | 1      2348   48    |
| 235    6      1     | 78     278    4     | 9      23578  578   |
| 245    248    2458  | 1789   12789  3     | 2457   24578  6     |
'---------------------'---------------------'---------------------'

this is my first sticking point
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Fri Mar 27, 2009 2:32 am    Post subject: Reply with quote

Norm,

You're using pencil marks! This is where I got stuck, after recognizing two hidden pairs:

Code:
.----------.-----------.----------.
| 8  1  .  | 4   .  .  | 3  .  9  |
| .  .  9  | 38  38 .  | 6  1  .  |
| .  .  3    .   .  1  | 8  .  2  |
:----------+-----------+----------:
| .  5  .  | .   .  9  | .  .  .  |
| 1  9  .  | 2   5  8  | .  .  3  |
| .  .  .  | .   .  .  | .  9  .  |
:----------+-----------+----------:
| 9  .  7  | 5   .  .  | 1  .  .  |
| .  6  1  | .   .  4  | 9  .  .  |
| .  .  .  | 19  19 3  | .  .  6  |
'----------'-----------'----------'


Now that I look at it, it seems so obvious!

Hint:
Quote:
One of the values is solved in only one cell. That is the key!


Keith


Last edited by keith on Fri Mar 27, 2009 2:54 am; edited 2 times in total
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Fri Mar 27, 2009 2:39 am    Post subject: Reply with quote

that's right, the 1's is what caught my attention
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Fri Mar 27, 2009 11:34 am    Post subject: Reply with quote

Well posted!! I think some of these very hard "hards" are more enjoyable than those that require advanced techniques. Here I struggled to find the quads and hidden pairs - but I still understood what I was looking for. For the very hards I use xy wings and URs by rote - but I've long forgotten or even care how they work. They are just tricks.

That's my philosophical rant for the day.
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS

PostPosted: Fri Mar 27, 2009 2:40 pm    Post subject: free Reply with quote

For me it was the 2678 quad in box 8.

Earl
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