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Puzzle 11/04/01: A Moderate (BBDB?)

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Sat Apr 02, 2011 1:46 am    Post subject: Puzzle 11/04/01: A Moderate (BBDB?) Reply with quote

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

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Sat Apr 02, 2011 8:08 am    Post subject: Reply with quote

this first step is basically a hyper extended m-wing.

Code:
+----------------+------------------+--------------------+
| 1    3     246 | 5(7)  9      26  | 8     24567  56(7) |
| 5    9     268 | (17)  168    4   | 167   1267   3     |
| 68   246   7   | 3     1568   268 | 9     12456  56    |
+----------------+------------------+--------------------+
| 39   6(7)  39  | 8     4      5   | 2     6(7)   1     |
| 678  467   468 | 9     2      1   | 3     567    56(7) |
| 2    5     1   | 6     7      3   | 4     8      9     |
+----------------+------------------+--------------------+
| 4    (17)  356 | 2     356-1  9   | 1567  167    8     |
| 79   27-1  29  | 5(1)  1568   68  | 1567  3      4     |
| 36   8     356 | 4     1356   7   | 156   9      2     |
+----------------+------------------+--------------------+

#1...(1=7)r7c2 - (7)r4c2 = (7)r4c8 - (7)r5c9 = (7)r1c9 - (7)r1c4 = (7-1)r2c4 = (1)r8c4; r8c2 and r7c5 <> 1

Code:
+--------------------+---------------+--------------+
| 1      3    2-6(4) | 57  9     26  | 8    24   57 |
| 5      9    268    | 17  168   4   | 67   12   3  |
| (68)   246  7      | 3   1568  268 | 9    124  56 |
+--------------------+---------------+--------------+
| 39     67   39     | 8   4     5   | 2    67   1  |
| 67(8)  467  6(48)  | 9   2     1   | 3    5    67 |
| 2      5    1      | 6   7     3   | 4    8    9  |
+--------------------+---------------+--------------+
| 4      1    356    | 2   356   9   | 567  67   8  |
| 79     27   29     | 15  1568  68  | 156  3    4  |
| 36     8    356    | 4   1356  7   | 156  9    2  |
+--------------------+---------------+--------------+

#2...(6=8)r3c1 - (8)r5c1 = (8-4)r5c3 = (4)r1c3; r1c3 <> 6
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK

PostPosted: Sat Apr 02, 2011 2:44 pm    Post subject: Reply with quote

Two nicely entangled ANTs... for two steps
Quote:
ant(268=4)r3c612 - ant(467=8)r45c2|r5c1 - (8=6)r3c1 ; r3c589<>6
xy-wing(28-4) r2c3 ; r1c3<>5, r5c2<>4
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