Web Paint-by-Number Forum
Comments on Puzzle #24180: Swan Lake 5. (by Ann)
By Thomas Genuine (Genuine)

peek at solution       solve puzzle
  quality:   difficulty:   solvability: deep lookahead  

Puzzle Description Suppressed:Click below to view spoilers

#1: Jota (jota) on Apr 5, 2014

Except for the last 2 birds on the top left corner and the green butterfly, it's color and line solvable!
#2: Heather M (AuntieH) on Apr 6, 2014
Cute series Ann.
#3: Susan Duncan (medic25733) on Apr 7, 2014
Good series Ann. I enjoyed it
#4: Joe (infrapinklizzard) on Apr 8, 2014 [HINT]
The butterfly solves with a smile.

The two birds make me frown a bit.


Hmm,

Picture logic makes it obvious that it's two v's, but It is difficult to find a non-deep lookahead with pure logic.

The best I can do is this:
a) Try to place the right 3 in r1 into the right clump of unknown. This can only go in c13-15 or c15-17. (C14-16 gives an immediate conflict in r2.) We will try c15-17 first.

b) This will leave a 2x2 rectangle in the right unknown clump. c13-14:r3-4 is the only unknown left in that clump now.

c) summing the clues in c13-14 gives us three more pixels to set.

d) the 3 in r3 cannot fit in that clump anymore, leaving only the 1 in r4.

= Since we need three pixels in c13-14 and can only set one, the original assumption must be wrong and the 3 in r1 cannot be in c15-17, making r1c17 white.


Then simple edge logic on the 3 in r1 will eliminate c16.

Which will then get us to a line logic finish.

So unless I'm missing something, this is deep lookahead.
#5: Web Paint-By-Number Robot (webpbn) on Apr 8, 2014
Found to be solvable with deep lookahead by infrapinklizzard.
#6: merkey (merkey88) on Apr 23, 2014 [HINT] [SPOILER]
Comment Suppressed:Click below to view spoilers

Show: Spoilers

Goto next topic

You must register and log in to be able to participate in this discussion.