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Comments on Puzzle #36018: Upside Down
By Joe (infrapinklizzard)

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

Puzzle Description:

Piet Mondrian's "New York City I" has been hanging upside-down since it was first put on display in 1945

#1: Joe (infrapinklizzard) on Oct 28, 2022 [SPOILER]

"Curator Susanne Meyer-Büser noticed the longstanding error when researching the museum's new show on the artist earlier this year, but warned it could disintegrate if it was hung the right side up now."

https://www.bbc.com/news/entertainment-arts-63423811
#2: Joe (infrapinklizzard) on Oct 29, 2022 [HINT]
After LL/CL finishes most of it (97%) leaving some green in the upper right and red in the lower left,

Summing for the green:
Since there must be at least seven more pixels of green in columns 24-31, and there is only one 1 in r4, r3 must have at least six green pixels in it. (and since it's a blob clue, they must be contiguous)
Therefore r3c26-29 must be green

LL finishes the green

Summing for the red is a little more complicated because of the blob in c6. So instead of summing for the whole of the unknowns, let's restrict it:

We'll look at the box of [r29-30 x c5-13]
> according to the vertical clues, there must be at least 8 more red pixels within that rectangle.
> The horizontal clues for those two rows are 1 and a blot.
= Therefore the blot must extend at least seven more pixels
SO r30c5-11 must be red

LL finishes the puzzle
#3: Belita (belita) on Oct 29, 2022 [SPOILER]
When I worked with interior designers they often chose abstract art so that if they had a space for a vertical picture and the one they chose was horizontal, or vice versa, they could just flip it sideways. Often the builders would come around and joke, "Uh, I think it's upside down" and we'd say, "No, just sideways." They probably thought we were joking.
#4: Web Paint-By-Number Robot (webpbn) on Oct 29, 2022
Found to be solvable with moderate lookahead by infrapinklizzard.
#5: Jota (jota) on Oct 30, 2022
Nice!
#6: Bananas (Bananas) on Oct 31, 2022
Thank you for this. I needed to know. I'm telling all my friends. ;-)
#7: derby (Derby) on Feb 22, 2023
Love it. I guessed Mondrian as I was working on it. I am not sure if I did it logically. It was fun though.

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