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Set XY_03 Puzzle 021

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Jun 24, 2009 3:48 pm    Post subject: Set XY_03 Puzzle 021 Reply with quote
I'm going to post easier puzzles for awhile. __ (easier being relative.)

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

Play this puzzle online at the Daily Sudoku site

Code:
 r8  b9  Locked Candidate 1              <> 4    [r8c4]

   c9b1  Empty Rectangle                 <> 1    [r5c2]

   c1b8  Empty Rectangle                 <> 7    [r2c4]   complementary
   c1b2  Empty Rectangle                 <> 7    [r9c5]

 r3  b3  Locked Candidate 1              <> 4    [r3c2]
     b1  Naked  Pair                     <> 17   [r1c23],[r2c3]

         XY-Wing  [r1c2]/[r1c9]+[r5c2]   <> 7    [r5c9]

   c9b3  Locked Pair                     <> 57   [r3c8]

 r38c78  <14> UR Type 6                  <> 4    [r3c7],[r8c8]

         BUG+1                           =  5    [r1c3]


Last edited by daj95376 on Mon Jul 06, 2009 5:54 am; edited 1 time in total
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Wed Jun 24, 2009 5:28 pm    Post subject: Reply with quote
A fun fthree step puzzle for me, although at one point I thought it was going to be a BBDBer.
Quote:
a m-wing starting with 17 in r2c1 and ending with 17 in r8c4: (7=1)r2c1 - (1=7)r9c1 - (7)r9c45 = (7)r8c4; r2c4<>7,
ER 1 in box 1 and strong link in col9 deletes 1 in r5c2 to set up
xy-wing 457 with pivot 45 in r1c2 to delete 7 in r5c9.

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Tue Jun 30, 2009 4:53 am    Post subject: Reply with quote
Six steps for me. W, XYZ, ER, XY, Hidden UR and BUG+1.
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