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Puzzle NR 09/12/16

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Dec 16, 2009 11:39 pm    Post subject: Puzzle NR 09/12/16 Reply with quote
Code:
 +-----------------------+
 | . 6 5 | 4 . . | . . 2 |
 | 8 4 . | . 2 . | 9 . . |
 | 2 . 3 | . . . | 4 . . |
 |-------+-------+-------|
 | 1 . . | 8 . . | . . . |
 | . 8 . | . 7 . | 2 . 9 |
 | . . . | . . . | . . 8 |
 |-------+-------+-------|
 | . 5 7 | . 9 . | 1 4 . |
 | . . . | . . . | 5 . 6 |
 | 4 . . | . 5 6 | . 2 . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Thu Dec 17, 2009 1:48 am    Post subject: Reply with quote
Code:
+---------------+-------------------+--------------+
| 79  6    5    | 4     138   1379  | 37   378   2 |
| 8   4    1    | (67)  2     37    | 9    367   5 |
| 2   79   3    | (59)  68    (579) | 4    68    1 |
+---------------+-------------------+--------------+
| 1   379  (26) | 8     36    59-2  | 367  357   4 |
| 5   8    4(6) | 1(6)  7     134   | 2    13    9 |
| 79  379  46-2 | (59)  1346  (259) | 367  1357  8 |
+---------------+-------------------+--------------+
| 6   5    7    | 2     9     8     | 1    4     3 |
| 3   2    8    | 17    14    147   | 5    9     6 |
| 4   1    9    | 3     5     6     | 8    2     7 |
+---------------+-------------------+--------------+

UR59[(2)r6c6 = (7)r3c6] - (7=6)r2c4 - (6)r5c4 = (6)r5c3 - (6=2); gets rid of some 2's

xy-wing is there simultaneously {1,3,6}
removes 3's in r4c7 and r5c6
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Thu Dec 17, 2009 4:40 am    Post subject: Reply with quote
I also used the UR 59 to solve the puzzle, but a slightly different sequence that offered by Norm. To prevent the deadly pattern, r3c6=7 or r6c6=2.

(7)r3c6 - (7=6)r2c4 - (6)r5c4 = (6)r5c3 - (6=2)r4c3.
(2)r6c6 - (2)r6c3 = (2)r4c3.

Thus r4c3=2.

I thien also used the xy-wing 1-36 to complete the puzzle.

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Dec 19, 2009 12:19 am    Post subject: Reply with quote
I used a Kite (9), XY (163), XY (673), Kite (3) and the 59 UR.
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