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Puzzle 10/07/23: A

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri Jul 23, 2010 11:38 am    Post subject: Puzzle 10/07/23: A Reply with quote
Code:
 +-----------------------+
 | . . . | 2 . 8 | 6 7 . |
 | . 6 . | 5 . . | 8 9 3 |
 | . . 3 | . . 7 | 1 . . |
 |-------+-------+-------|
 | 7 3 . | 9 . . | 2 . . |
 | . . . | . . 3 | 9 . . |
 | 1 . 2 | . 7 . | . . . |
 |-------+-------+-------|
 | 9 7 8 | 3 6 . | 5 1 . |
 | 3 2 . | . . . | 7 . . |
 | . 5 . | . . . | . . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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Luke451



Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California
PostPosted: Fri Jul 23, 2010 7:38 pm    Post subject: Reply with quote
Is it my imagination, or did 10/07/23: A mysteriously morph into a different puzzle Question
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri Jul 23, 2010 8:25 pm    Post subject: Reply with quote
Luke451 wrote:
Is it my imagination, or did 10/07/23: A mysteriously morph into a different puzzle Question

The current version matches the entry in my "current puzzles" file and my archive file for the month of July.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Fri Jul 23, 2010 10:57 pm    Post subject: Reply with quote
Luke451 wrote:
Is it my imagination, or did 10/07/23: A mysteriously morph into a different puzzle Question

It morphed--unfortunately--into A-1, A-2 and A-3, but I'll spare you the gruesome details. Rolling Eyes

Skyscraper (4) + two extensions
Coloring (8 )
XY-Wing (234), flightless with pincer extension
Type 1 UR (48 )
XY-Wing (184); there was also a BUG+2 available as an alternative
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sat Jul 24, 2010 1:21 pm    Post subject: Reply with quote
Lots of single-digit moves, the first in this two-stepper does a lot of eliminations if not too much damage!

Quote:
x-loop(4) (4)r6c4=r8c4 - r7c6=r7c9 - r9c7=r6c7 - (4)r6c4; r6c68<>4, r89c8<>4, r89c56<>4
ANP(46)[(46)r9c13=(1)r9c3] - (1=8)r9c5 - (8=4)r8c4; r8c3<>4
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sat Jul 24, 2010 2:42 pm    Post subject: Reply with quote
A three step solution without a single digit pattern.

Quote:
Overlapping Type 4 URs:
(45)r13c19 with x-wing 5; r3c19<>4
(48)r35c12 with x-wing 8; r35c1<>4 which sets up a short xy-chain

(4=2)r7c9-(2=5)r3c9-(5=8)r3c1-(8=6)r5c1-(6=4)r9c1; r9c78<>4

Ted
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Jul 24, 2010 4:29 pm    Post subject: Reply with quote
peterj wrote:
Lots of single-digit moves, the first in this two-stepper does a lot of eliminations if not too much damage!

For this forum, I restrict my fish solutions to size N=2, which catches X-Wings, Skyscrapers, Kites, and Empty Rectangles. After reading your first step, I manually confirmed a larger fish. Nice catch!

unfinned mutant Swordfish r7c47\r6b89

===== ===== ===== ===== =====

Ted: Nice find for steps 1/2 ... and single-digit steps all around!
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