#1  
Old 06-13-2013, 03:59 PM
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BillsBayou BillsBayou is offline
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Default Need Another Set of Eyes on This One

I know this is going to be simple, but I just cannot find it.

Here it is blank:
Logic-Sandwiches1.gif

Here it is at my bottleneck:
Logic-Sandwiches2.gif

Clues 5 and 7 are the same, but I left them both visible just the same.

I'm going to scream when someone shows me the simple damned thing I'm missing, but I've been staring at it for an hour and it's making me crazy.
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  #2  
Old 06-13-2013, 06:25 PM
shriekingviolet shriekingviolet is offline
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I was not able to get quite as far as you did yet. But -

#1 tuna < Erica and
#7 water < Chip

So tuna on rye cannot be water. I'm going to see if that will get me the rest of the way.


eta - yep, that did it

Last edited by shriekingviolet; 06-13-2013 at 06:30 PM.
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Old 06-13-2013, 06:49 PM
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BillsBayou BillsBayou is offline
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Thanks! Difficult to see unless someone points it out to me.

I've seen it before. I need to remember it.
Categories A, B, C
A1, A2, ... A5 are members of Category A
Constant increment I

If:
A1 - I = B1
A2 - I = C1
Then:
B1 <> C1
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Old 06-13-2013, 07:00 PM
shriekingviolet shriekingviolet is offline
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That's usually the last thing to click for me, too, because I end up having to write down all the greater-than/less-than clues and see if anything jumps out. Your partial grid had several more eliminations than I was able to get before I found the tuna =/= water part though!
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Old 06-14-2013, 12:57 PM
zenobia43 zenobia43 is offline
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The ordering clues are pretty useful if you find yourself at that brick wall. This is the place where you start to doubt that each puzzle has a solution, and you doubt that the puzzle can be solved with pure logic instead of guessing and checking.

In this puzzle clues 5 and 7 can be expressed in the notation shown in the videos.

water -> root beer
water -> Chip

In both cases, the increment/distance is fixed at 45 cents or one row.

This means that root beer must be in the same row as Chip.

When you see several clues with fixed increments of the same value, and especially if you see a clue of that type where the categories on the left and right are the same (clue 5 in this puzzle), there is a good chance that a key exclusion or positive will be found.

The exclusions and positive relations can be obtained on the first pass through the clues unless a subsitution is needed.
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  #6  
Old 06-14-2013, 02:09 PM
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Quote:
Originally Posted by shriekingviolet View Post
That's usually the last thing to click for me, too, because I end up having to write down all the greater-than/less-than clues and see if anything jumps out. Your partial grid had several more eliminations than I was able to get before I found the tuna =/= water part though!
I came up with more eliminations because I was running the puzzle through the wringer. I wanted to squeeze and squeeze and squeeze.
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