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Fences Puzzle #2948 by valvino
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mucha



Joined: 19/05/2009 17:40:58
Messages: 104
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Number: Puzzle #2948
Genre: Fences
Author: valvino
Appeared at: September 8, 2011
That's a very nice puzzle but I don't really get the 3* thingy. There's an obvious 50/50 guess spot from the get go..
valvino



Joined: 16/04/2008 20:15:15
Messages: 46
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TBH I agree with you - then again I find it really hard to rate the difficulty of the puzzles I design, what with knowing how they were constructed and all. For this puzzle it's fairly easily to guess your way through it, but where's the fun in that!?
Bram



Joined: 04/03/2008 13:59:34
Messages: 359
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I think I put it on the 2/3 star border, jumped down by now. It's one of those puzzles that solves really quickly if you guess, but figuring it out logically take a while. You really have to analyse one side only, but still it's not exactly easy.
anurag.sahay



Joined: 25/06/2009 11:29:52
Messages: 179
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This doesnt really yield with guesswork either.The right half is really tricky.Easily 3* stuff,especially for the novice.
mucha



Joined: 19/05/2009 17:40:58
Messages: 104
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anurag.sahay wrote:
This doesnt really yield with guesswork either.The right half is really tricky.Easily 3* stuff,especially for the novice. 

The right side? What do you mean? The puzzle is 100% symmetric under 90 degree rotation so you only need to solve a quarter, and by uniqueness all quarters need to go the same way. So you just need to pick the right way to go with the 012 in the lower right.
Lord_Farin



Joined: 30/12/2010 15:32:40
Messages: 63
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mucha wrote:
by uniqueness 

There is your problem. Uniqueness is provable and hence not really a valid clue in my opinion. One could, however, rotate any reasoning 90 degrees to obtain such a result (as it is guaranteed to work).
 
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