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Puzzle 10/10/21: B XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Thu Oct 21, 2010 2:40 am    Post subject: Puzzle 10/10/21: B XY Reply with quote

I've run out of (obvious) single-stepper puzzles. Let me know if the latest crop of puzzles prove unsatisfactory.

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

Play this puzzle online at the Daily Sudoku site
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peterj



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

PostPosted: Thu Oct 21, 2010 8:56 am    Post subject: Reply with quote

Three steps...
Quote:
skyscraper(1) r2, r9 ; r3c3<>1, r78c1<>1
xy-chain ; (1=8)r9c3 - (8=3)r9c7 - (3=5)r1c7 - (5=4)r1c5 - (4=1)r8c5 ; r8c3<>1
BUG+1 ; r2c7=5
There was a nice but extraneous m-wing(56) also
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tlanglet



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

PostPosted: Thu Oct 21, 2010 2:15 pm    Post subject: Reply with quote

As usual, a very interesting puzzle. I like the puzzles that require multiple steps; makes the fun last longer......

Quote:
w-wing (18)r3c9|r9c3 SL (8)r8c39; r3c3<>1
xy-chain: (8=3)r9c7-(3=5)r1c7-(5=4)r1c5-(4=1)r8c5-(1=8)r8c3; r9c3<>8
BUG+1; r2c7=5

Ted
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Thu Oct 21, 2010 3:47 pm    Post subject: Reply with quote

tlanglet wrote:
I like the puzzles that require multiple steps; makes the fun last longer......

Then you should love the stack of puzzles remaining in my inventory.
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Marty R.



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

PostPosted: Fri Oct 22, 2010 1:27 am    Post subject: Reply with quote

ERs (3,1)
W-Wing (17)
BUG+1

I like multiple steps too. When I'm looking to spend 45 minutes and I'm done in 20, that makes me go through more puzzles. Regardless of number of steps, if I can finish a puzzle with legitimate steps, i.e., steps that I don't consider trial and error, then I'm happy.

Of course, that has its limits; I'm not that thrilled when I take eight steps while everyone else finished it in two.
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