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Puzzle NR_075

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Oct 24, 2009 5:19 pm    Post subject: Puzzle NR_075 Reply with quote
Code:
NR puzzles can be solved using these techniques:

Basics:  Naked/Hidden Single, Naked Pair/Triple, Locked Candidates 1/2
Basics+: Naked Quad, Hidden Pair/Triple/Quad
VH:      BUG+1, UR Type 1, X-Wing, XY-Wing
VH+:     2-String Kite, Empty Rectangle, Remote Pair, Skyscraper,
         XYZ-Wing, finned X-Wing, UR Type 2/4


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

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Mon Oct 26, 2009 12:47 am    Post subject: Reply with quote
Code:
+------------------+------------------------+--------------+
| 3       58    7  | 6       589(1)  89(12) | 29  2589  4  |
| 59      4     1  | 589(2)  589     7      | 6   2589  3  |
| 6       2     89 | 589     3       4      | 1   589   7  |
+------------------+------------------------+--------------+
| 14579   1578  89 | 3       14589   189    | 57  6     2  |
| 1579    1578  3  | 1589    2       6      | 57  4     19 |
| 45      6     2  | 45      7       19     | 8   3     19 |
+------------------+------------------------+--------------+
| 1-8(2)  9     5  | 18(2)   (18)    3      | 4   7     6  |
| 127     17    4  | 1279    6       5      | 3   129   8  |
| 1278    3     6  | 124789  1489    1289   | 29  129   5  |
+------------------+------------------------+--------------+

(8=1)r7c5 - (1)r1c5 = (1-2)r1c6 = (2)r2c4 - (2)r7c4 = (2)r7c1; r7c1 <> 8
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Tue Oct 27, 2009 2:09 pm    Post subject: Reply with quote
I noticed that Norm took the short road, but I took the long one. I did not have the time to smell the roses, but I did find a couple of interesting (for me) moves.

x-wing 2 in r19c67
ER 8 with hinge in box1, that open up a
xy-wing -589 with vertex 89 in r3c3,
useless skyscraper 5 in r13c8 with extended pincer: (5)r3c4 - (5)r56c4 = (5)r4c5; r4c2<>5,
a "kite-like" pattern with hinge in box1 and grouped strong link for one pincer: (5)r2c1 - (5)r2c45 = (5)r3c4; r5c4<>5,
kite 5 with hinge in box5,
for variation a w-wing 18 in r4c6 & r7c5 and strong link 1 in row1, to complete the puzzle.

Ted
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