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Puzzle 10/10/29: B XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Fri Oct 29, 2010 12:30 am    Post subject: Puzzle 10/10/29: B XY Reply with quote

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

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Fri Oct 29, 2010 6:27 am    Post subject: Reply with quote

Code:
+-----------+----------------------+-----------------+
| 5  239  6 | 79       8      279  | 239   4     1   |
| 4  239  8 | (56)     35(6)  1    | 2359  3579  579 |
| 7  239  1 | 4        35     29   | 6     359   8   |
+-----------+----------------------+-----------------+
| 6  45   2 | 8        479    3    | 1     579   579 |
| 9  45   3 | 67       1      467  | 8     2     567 |
| 1  8    7 | 2        69     5    | 39    369   4   |
+-----------+----------------------+-----------------+
| 8  16   9 | 3        (456)  (46) | 7     156   2   |
| 3  167  4 | 1679(5)  2      679  | 59    8     569 |
| 2  167  5 | 1679     7-6    8    | 4     169   3   |
+-----------+----------------------+-----------------+


(46=5)r7c56 - (5)r8c4 = (5-6)r2c4 = (6)r2c5; r9c5 <> 6

this is also the als version of the gM-wing Shocked Shocked
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peterj



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

PostPosted: Fri Oct 29, 2010 7:31 am    Post subject: Reply with quote

An interesting variant on norm's move would be an ALS version of an xyz-wing Exclamation

Notice that the ANP(35)r23c5 creates a strong link (5)r23c5=(6)r2c5. The xyz-wing is pivot (456)r7c5 with (46)r7c6. So r9c5<>6
Code:
xyz-wing(45-6) r7c5 ; r9c5<>6
(6)r7c5
||
(4)r7c5 - (4=6)r7c6
||
(5)r7c5 - ANP(35)[(5)r23c5=(6)r2c5]

or simply

(6=35)r23c5 - (5=46)r7c56 ; r9c5<>6
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yeoks



Joined: 16 May 2010
Posts: 33

PostPosted: Sat Oct 30, 2010 3:48 am    Post subject: Reply with quote

W-wing (67); r4c5, r89c4 <>7
UR Type 4 (16); r79c8<>6
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tlanglet



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

PostPosted: Mon Nov 08, 2010 1:53 pm    Post subject: Reply with quote

AXY-wing 46-7 vertex (46)r7c6, pincers (47)r5c6 & (67)r9c5 with fin (6)r5c6
If xy-wing is true; r4c5<>7
If fin is true (6)r5c6-(6=7)r5c4; r4c5<>7

Ted
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