#1  
Old 06-04-2013, 06:37 PM
BillsBayou's Avatar
BillsBayou BillsBayou is offline
Member
 
Join Date: Mar 2013
Location: New Orleans
Posts: 75
Default Today's Challenge - Find the fault in the ladder

I was going to post this one with a plea for help, then I figured out the approach while I was typing the title. I stared at this one for half an hour and found nothing, but the light goes off when I come here. Gee but this forum is so helpful. I got the answer before I posted! You guys are awesome.

Ok, so here's the puzzle in it's blank state:

Logic-Presidents2.gif

I'll post the puzzle at the bottleneck in the first reply to this post.
Reply With Quote
  #2  
Old 06-04-2013, 06:40 PM
BillsBayou's Avatar
BillsBayou BillsBayou is offline
Member
 
Join Date: Mar 2013
Location: New Orleans
Posts: 75
Default

Here's the puzzle at the bottleneck. Don't look unless you've really worked it over. There are some complementary exclusion sets and 2x2 sets in there that took me a few iterations to develop. I don't want to spoil your fun.

Logic-Presidents1.gif

At this point only clues 7 and 8 are left.

Can you figure it out from here? I'll post the key to solving this in a later reply if anyone asks; but not until asked.

Last edited by BillsBayou; 06-04-2013 at 06:43 PM.
Reply With Quote
  #3  
Old 06-04-2013, 08:50 PM
shriekingviolet shriekingviolet is offline
Junior Member
 
Join Date: May 2013
Posts: 13
Default

Oh my gosh, that one was hard! It took me forever to get my filled-in grid to match yours, and then another eternity before that last epiphany hit. I am having a pretty bad brain fog day today though. But I got it eventually.

I have really enjoyed reading through your threads on the hard puzzles/advanced logic. I've learned a lot.
Reply With Quote
  #4  
Old 06-04-2013, 08:53 PM
zenobia43 zenobia43 is offline
Senior Member
 
Join Date: Mar 2012
Posts: 102
Default

I hope this isn't spoiling anything, but the key to this solution, starting from the "stuck" screen shot, is found in a very recent post on this subject.

The symmetry of the open spaces in this puzzle is scary. This is what it looks like if an X was misplaced or a clue was misinterpreted. All those open rectangles beg you to hit the reset button or start trying some of the limited choices that remain to see if you can find a conflict quickly.

The two remaining clues and other available information are all that is needed to solve this with pure logic.
Reply With Quote
  #5  
Old 06-04-2013, 09:09 PM
BillsBayou's Avatar
BillsBayou BillsBayou is offline
Member
 
Join Date: Mar 2013
Location: New Orleans
Posts: 75
Default

Quote:
Originally Posted by zenobia43 View Post
I hope this isn't spoiling anything, but the key to this solution, starting from the "stuck" screen shot, is found in a very recent post on this subject.
Yes. Those who fail to learn from history are doomed to repeat it. Pretty much sums up me. Ask my wife for more examples.

Quote:
Originally Posted by zenobia43 View Post
The symmetry of the open spaces in this puzzle is scary. This is what it looks like if an X was misplaced or a clue was misinterpreted. All those open rectangles beg you to hit the reset button or start trying some of the limited choices that remain to see if you can find a conflict quickly.
Yeah. Scared me too. I saved a screen shot then hit reset. Then I built the same exact puzzle again.

Quote:
Originally Posted by zenobia43 View Post
The two remaining clues and other available information are all that is needed to solve this with pure logic.
That's what they tell us. So far, it appears to be true.
Reply With Quote
  #6  
Old 06-04-2013, 09:11 PM
BillsBayou's Avatar
BillsBayou BillsBayou is offline
Member
 
Join Date: Mar 2013
Location: New Orleans
Posts: 75
Default

Quote:
Originally Posted by shriekingviolet View Post
Oh my gosh, that one was hard! It took me forever to get my filled-in grid to match yours, and then another eternity before that last epiphany hit. I am having a pretty bad brain fog day today though. But I got it eventually.

I have really enjoyed reading through your threads on the hard puzzles/advanced logic. I've learned a lot.
Glad you enjoyed this one. Happy to hear you could get as far as I did. This one does require a good long massage before giving up its secrets.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT. The time now is 11:40 PM.


Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

About Puzzle Baron

The Puzzle Baron family of web sites has served millions and millions of puzzle enthusiasts since its inception in 2006. From cryptograms to acrostics, logic puzzles to drop quotes, patchwords to wordtwist and even sudoku, we run the gamut in word puzzles, printable puzzles and logic games.