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Comments on Puzzle #26032: ;)
By Brittany ()

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

Puzzle Description:

(This puzzle was recovered from the 2016 database crash. Description not available.)

#1: Brian Bellis (mootpoint) on May 29, 2019       classify

Winky face
#2: Joe (infrapinklizzard) on Oct 27, 2019 [HINT]       classify
After LL
Smile logic in rows 4&6 finishes the top

The picture and the symmetry of the remaining clues make it obvious what the bottom looks like, but logically it is hard to prove without deep lookahead.
#3: Web Paint-By-Number Robot (webpbn) on Oct 27, 2019       classify
Found to have a unique solution by infrapinklizzard.
#4: Web Paint-By-Number Robot (webpbn) on Oct 27, 2019       classify
Found to be solvable with deep lookahead by infrapinklizzard.
#5: Frank Camp (marakesh) on Jan 5, 2020 [HINT]       classify
I did the bottom part as follows:

Prove that R13C3 and R13C13 cannot be black
LL
Prove that R9C7 and R9C9 cannot be black
Prove that R9C6 and R9C10 cannot be black
LL

I think this is moderate lookahead, right?
#6: Joe (infrapinklizzard) on Jan 6, 2020 [HINT]       classify
Frank, your first line is deep lookahead. You must place the 5 and then place the crossing 3s into r12, which then forces the crossing 2s into r14 which then could either
> go right into c8 which would trigger the 2 which would create a conflict in r13, OR
> go left into c5 which would then need two more steps to get to a conflict.

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