Comments on Puzzle #31913: Happy Birthday, Isaac!
By Gaynor Sorrell (gesorrell)
peek at solution solve puzzle
quality: 
difficulty: 
solvability: line & color logic only
peek at solution solve puzzle
quality: difficulty: solvability: line & color logic only
Puzzle Description:
Newton's Universal Law of Gravitation, where blue = 1 and red = 2
#1: Jota (jota) on Dec 25, 2018
Happy B-Day!#2: Kristen Vognild (kristen) on Dec 26, 2018 [SPOILER]
What fun! If I'd taken physics, I probably would've known this one. :)#3: Ga Hendrick (GaHendrick) on Jan 2, 2019 [SPOILER]
Did Isaac receive an apple for his birthday?? Thanks for the puzzle.
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