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Messages posted by: connect4
Profile for connect4 -> Messages posted by connect4 [244] Go to Page: Previous  1, 2, 3 ... 14 , 15, 16, 17 Next 
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achan1058 wrote:
It would be interesting, if someone designs a puzzle that uses unique solution as the main key for solving it. Can it be done, I wonder? 


If you look at the 2007 US Sudoku Championship final puzzle in the advanced category, Thomas Fisher used that as the breakthrough he needed to solve one of the puzzles. You technically could have gotten away with using Y-wings to solve it, apparently, but it was significantly easier if you use uniqueness.
Just as a warning to people who solve kakuros...

9+6 =/= 16

Took me five tries to realize that the above equation was true, so I figured I'd pass it on to everyone!

That being said, nice one Bram
Number: Puzzle #959
Genre: Kakuro
Author: Bram
Appeared at: August 2, 2008
For me, it depends on the puzzle. Sudoku and the other number puzzles are ones will I won't do that (unless I'm in a timed competition, in which case anything goes!). In archipelago, on the other hand, I use it regularly (and it's probably one of the only ways for me to do them).

I agree that it feels dirty to make that assumption, but in some puzzles I don't have better tools (which reminds me, I had meant to make a "tips/tricks for genre XXX and YYY" thread at some point, as some of those genres just throw me for a loop!)

svdb wrote:
How about "Within each line, column, and demarcated area, each digit occurs the same number of times, and at least once"?
 


That one works on this puzzle, but it doesn't work on others (for instance, puzzles 614 and 686 by Richard.Stolk) where single boxes are sometimes placed.
I think this can be fixed by specifying that all areas of size exactly N will contain each of the digits from 1..N exactly once (where N is the number specified in the puzzle). The current rule with "all larger areas" could be confusing.

As for this puzzle, under the above interpretation, you do not need to violate a rule for the solution to be valid.
Very nice puzzle. I like the potential that this type of puzzle has

Excellent addition to PP
Number: Puzzle #743
Genre: Diamonds
Author: Johan
Appeared at: June 21, 2008
Nice puzzle, but you really should have put the correct final score in for the France-Netherlands game
 
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