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Set H Puzzle 21

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri Dec 19, 2008 10:29 pm    Post subject: Set H Puzzle 21 Reply with quote
This is possibly an Ad_Hoc level puzzle.

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

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Sat Dec 20, 2008 6:19 am    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
| 1      2345   9     | 7      6      2345  | 234    8      23    |
| 345    8      234   | 15     2345   12345 | 7      6      9     |
| 7      234    6     | 239    2349   8     | 234    5      1     |
:---------------------+---------------------+---------------------:
| 9      234    2348  | 6      23458  2345  | 1238   12     7     |
| 6      7      2348  | 23     1      234   | 238    9      5     |
| 38     1      5     | 239    2389   7     | 6      4      238   |
:---------------------+---------------------+---------------------:
| 3458   6      348   | 15     235    1235  | 9      7      28    |
| 2      9      1     | 8      7      6     | 5      3      4     |
| 358    35     7     | 4      235    9     | 128    12     6     |
'---------------------'---------------------'---------------------'

Quote:
going for the throat...
1. (8)r5c7 = (8-2)r5c3 = (2)r4c23 - (2=1)r4c8 - (1)r9c8 = (1)r9c7; r9c7 <> 8
that tears a hole in it for a while
2. ER 4... (4)r4c5 = (4)r2c5 - (4)r2c13 = (4)r13c2; r4c2 <> 4
singles.
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sat Dec 20, 2008 3:01 pm    Post subject: Reply with quote
For me, this was another nice "BBDB (Bend-But-Don't-Break) puzzle taking seven steps including a skyscraper, ER, UR, x-wing, multi-coloring, and a couple of xy-wings. Enjoyable............

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Dec 20, 2008 7:33 pm    Post subject: Reply with quote
Similar to Ted, a "BBDB", with a couple of Type 4 URs, a few ERs, couple of XYZ-Wings and an XY-Wing to finish up.
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada
PostPosted: Sat Dec 20, 2008 8:41 pm    Post subject: Reply with quote
You need to be on the ball to finish this one. I did it using a Type 4 UR, an xy wing and 7 ER's (on 2, 3, 8 and two on 5). The last one on 4 from R5 used two pincers (B2 and B1) to knock off the 4 in R4C2.
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