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Free Press September 16, 2011

 
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keith



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

PostPosted: Fri Sep 16, 2011 2:49 pm    Post subject: Free Press September 16, 2011 Reply with quote

Not yet done. Seems to be on the long side, many steps.
Code:
Puzzle: FP091611
+-------+-------+-------+
| 6 . 3 | . 1 7 | . . . |
| . 2 1 | . . . | . 6 . |
| . 7 . | . . . | . . . |
+-------+-------+-------+
| 5 . . | 3 . . | . . . |
| . 8 . | . . . | 6 5 . |
| 4 . . | 2 . 5 | . . 9 |
+-------+-------+-------+
| . . . | . . . | . 7 . |
| . 1 . | . . . | 8 9 . |
| . . . | 8 7 . | 4 . 2 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Fri Sep 16, 2011 5:51 pm    Post subject: Reply with quote

I used a UR, XY-Wing, three W-Wings and a Skyscraper.
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keith



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

PostPosted: Fri Sep 16, 2011 6:00 pm    Post subject: Reply with quote

Marty R. wrote:
I used a UR, XY-Wing, three W-Wings and a Skyscraper.

I sort of had the same. After basics:
Code:
+-------------+-------------+-------------+
| 6   45  3   | 459 1   7   | 259 24  8   |
| 89  2   1   | 459 345 38  | 579 6   47  |
| 89  7   45  | 6   245 28  | 59  3   1   |
+-------------+-------------+-------------+
| 5   69  69  | 3   8   1   | 27  24  47  |
| 1   8   2   | 7   49  49  | 6   5   3   |
| 4   3   7   | 2   6   5   | 1   8   9   |
+-------------+-------------+-------------+
| 2   469 8   | 1   459 469 | 3   7   56  |
| 7   1   46  | 45  23  23  | 8   9   56  |
| 3   569 569 | 8   7   69  | 4   1   2   |
+-------------+-------------+-------------+
Then I noticed the skyscraper on 4 in R38 is a one-stepper.

Keith
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Fri Sep 16, 2011 6:19 pm    Post subject: Free Press September 16, 2011 Reply with quote

I used the two hidden UR's 49 and 69 followed by W-wing 45 with SL 4 in row 8 setting r3c5<>5. After that, a Kite in 4 originating from BOX 1 setting r7c5<>4.
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Fri Sep 16, 2011 8:30 pm    Post subject: Reply with quote

Here is a three step solution; a heavy hammer and two easy nudges...........

Almost Sue de Coq b2 & r2
abcde=(34589)r2c456
ab=(89)r1c2
cd=(45)r3c5
e=(3)r2c56
fin (2)r3c5
SdC(34589)b2&r2=(2)r3c5-(2=8=9=5=4)r3c6173-(4=5)r1c2; r1c4<>5

coloring (4); r1c4<>4

coloring (4); lots of deletions

Ted
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keith



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

PostPosted: Sat Sep 24, 2011 2:08 am    Post subject: Reply with quote

SS said:

3 x Simple Forcing Chains
1 x XYZ-Wing
1 x XY-Wing
1 x Unique Rectangles and Loops
1 x Comprehensive Naked Sets
3 x Intersection Removal
1 x Simple Hidden Sets
2 x Simple Naked Sets
20 x Pinned Squares


Seems more complicated.

Keith
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