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Fri 30 June (Friday, 30th June 2006)
PuzzleLover
Kwon-Tom Obsessive
Puzzles: 1033
Best Total: 38m 17s
Posted - 2006.06.30 02:07:45
I only got this far with patterns and short reads.  A lucky Fix Position guess (right, bottom around the 3 at r9c8) let me finish in a fair (for me) time.  But can one finish up with simpler logic?  Details greatly appreciated.  Thanks.


By the way, I used the Lamppost Principle to pick this Fix Position attempt.  If you lose your keys in the dark, you might as well look under a lamppost first, since if they're there you can see them.  This guess obviously triggers other patterns in short order, so I hoped it would lead somewhere useful (and it did).
Last edited by PuzzleLover - 2006.06.30 02:48:34
Tilps
Kwon-Tom Obsessive
Puzzles: 4324
Best Total: 20m 22s
Posted - 2006.06.30 04:48:49
You can rule out the top of the 3 in row two column six, it causes a closed loop 'relatively quickly'.  But other than that I don't have anything.
Last edited by Tilps - 2006.06.30 04:49:59
astrokath
Kwon-Tom Obsessive
Puzzles: 3093
Best Total: 13m 42s
Posted - 2006.06.30 07:46:29
I also spotted a very obvious closed loop which could be avoided by placing a line on top of the three towards the top right at r4c10.  It's pretty similar to the one tilps pointed out, which I didn't spot on my way through.

After that, finding the wrong places to put lines around the 1 towards the top left (r4c3) was pretty quick, and it was all downhill from there. Yeah, that was trial and error rather than logic, but it turned out to be a very fruitful place to start looking, particularly with the semi-closed off box to the right of the 1. 

The bottom right was open ended, but I chose the outward pointing loop around the 2 in the bottom right corner, which was correct and  rapidly finished things off.
Last edited by astrokath - 2006.06.30 07:47:50
foilman
Kwon-Tom Admin
Puzzles: 1720
Best Total: 24m 8s
Posted - 2006.06.30 08:20:41
I managed to get a ridiculously slow time (for me) by trying lots of things which didn't work and not stopping long enough to actually think about what I was doing. But I liked the wrong, which changed just about everything on the puzzle!
mathmaniac
Kwon-Tom Obsessive
Puzzles: 1198
Best Total: 20m 57s
Posted - 2006.06.30 15:17:19
I made a lucky guess and finished the puzzle in fourteen minutes but I had to check if it was valid because I had not yet ruled out other possibilities.
procrastinator
Kwon-Tom Obsessive
Puzzles: 1083
Best Total: 12m 56s
Posted - 2006.07.05 05:28:12
Apart from everyday patterns, I ruled out:
Line over 3 in top middle
Line on left of 1 just above that
Line above that 1 (Actually I looked at closing the other end of that loop)
The wrong orientations of the 3 leading into the top right
Joining the adjacent endpoints of the two big almost-loops

Unfortunately I missed the pattern that gives the orientation of the 3 just above the bottom left corner, so I didn't get the third step until I finally noticed my oversight after I'd searched the whole board for tricky stuff.

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