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Puzzle 10/06/07: (B) BBDB

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Jun 07, 2010 4:47 pm    Post subject: Puzzle 10/06/07: (B) BBDB Reply with quote
Code:
 +-----------------------+
 | . . . | 3 . . | . . 9 |
 | . 7 . | . . 2 | . 5 . |
 | . . 3 | . . 8 | . . . |
 |-------+-------+-------|
 | 7 . . | . . . | . 4 3 |
 | . . . | . . 7 | 5 . . |
 | . 3 5 | . 1 6 | 2 . 7 |
 |-------+-------+-------|
 | . . . | . 2 4 | 7 . . |
 | . 4 . | 8 . . | . 2 . |
 | 1 . . | 6 . 3 | . . 4 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site


Code:
 after basics
 +--------------------------------------------------------------------------------+
 |  24568   12568   12468   |  3       456     15      |  1468    7       9       |
 |  4689    7       14689   |  19      469     2       |  3       5       168     |
 |  4569    1569    3       |  7       4569    8       |  146     16      2       |
 |--------------------------+--------------------------+--------------------------|
 |  7       1269    1269    |  259     8       59      |  169     4       3       |
 |  24689   12689   124689  |  249     3       7       |  5       16      168     |
 |  489     3       5       |  49      1       6       |  2       89      7       |
 |--------------------------+--------------------------+--------------------------|
 |  5689    5689    689     |  159     2       4       |  7       3       156     |
 |  3       4       679     |  8       579     159     |  16      2       156     |
 |  1       25      27      |  6       57      3       |  89      89      4       |
 +--------------------------------------------------------------------------------+
 # 101 eliminations remain
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Mon Jun 07, 2010 10:22 pm    Post subject: Reply with quote
Three steps with a nice opening wing..

Quote:
m-wing (5=1)r1c6-r8c6=(1-5)r7c4=r4c4; r4c6<>5
kite(5); r3c5<>5
xy-wing(169) r2c4; r2c5<>6, r3c8<>6
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Mogulmeister



Joined: 03 May 2007
Posts: 1151
PostPosted: Tue Jun 08, 2010 10:58 am    Post subject: Reply with quote
Three steps, same eliminations but different take outs for the first 2 steps:

Quote:
1. (5-9)r4c6=(9-1)r8c6=(1-5)r7c4=(5)r4c4 contradiction so r4c6<>5

2. ER removes 5 from r3c5

3. <169> XY Wing r2c5, r3c8 <> 6
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Tue Jun 08, 2010 1:07 pm    Post subject: Reply with quote
Also three steps...........

Quote:
xy-wing 15-9 with vertex 15 n r1c6; r456c4<>9
ANT(579=6)r389c5 - (6=1)r3c8 - r2c9 = r2c4 - (1=5)r1c6; r1c5<>5
coloring 5 to complete the puzzle

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Jun 09, 2010 1:12 am    Post subject: Reply with quote
Another three-stepper.

XY-Wing (159)
W-Wing (15), flightless, with pincer transport
XY-Wing (196)
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