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Puzzle 10/03/12 Advanced

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Fri Mar 12, 2010 7:23 pm    Post subject: Puzzle 10/03/12 Advanced Reply with quote

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

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Sat Mar 13, 2010 2:44 am    Post subject: Reply with quote

finally created a video of one of Danny's puzzles

here is the VOD

10/3/12/advanced
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tlanglet



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

PostPosted: Sat Mar 13, 2010 6:20 am    Post subject: Reply with quote

An convoluted move to start the process after basics.

Code:
 *--------------------------------------------------------------------*
 | 56     135    2      | 1356   4      13     | 8      9      7      |
 | 568    13458  13458  | 1356   7      9      | 2      15     34     |
 | 9      1345   7      | 2      135    8      | 15     6      34     |
 |----------------------+----------------------+----------------------|
 | 7      3458   3458   | 9      6      13     | 135    145    2      |
 | 1      9      35     | 4      8      2      | 35     7      6      |
 | 34     2      6      | 7      13     5      | 9      14     8      |
 |----------------------+----------------------+----------------------|
 | 58     6      13     | 1358   135    7      | 4      2      9      |
 | 2      7      58     | 58     9      4      | 6      3      1      |
 | 34     134    9      | 13     2      6      | 7      8      5      |
 *--------------------------------------------------------------------*


I do not know how to properly annotate this move so my description is mostly English plus an attempt at Eureka at the end.

Look at r3c5: either r3c5=5 or r3c5=13.
If r3c5=13, this forms a 13 pair with r1c6, which
creates a Type 1 UR 56 in r12c14 that forces r2c1=8, which
makes r7c1=5.
Thus we now have pincers on 5 in r3c5 and r7c1 which delete 5 in t7c5.

(5)r3c5 = (13)r3c5|r6c1 - (13=56)r12c6 - UR56r12c14 = (8)r2c1 - (8=5)r7c1; r7c5<>5.

This move did not solve the puzzle but was fun.

A Type 1 UR38 and a xy-wing-348 with pseudocell pincer and transport completed the puzzle.

Ted
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Sat Mar 13, 2010 6:52 am    Post subject: Reply with quote

Ted,
your logic works.

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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat Mar 13, 2010 8:37 pm    Post subject: Reply with quote

A Kite on 1, pivoted in box 6, takes out the 1 from r3c5. A W-Wing on 13, connected by the 3s in c1, takes out the 1 from r7c5. The 35 pair left in c5 finishes it off.
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