peek at solution solve puzzle
quality: difficulty: solvability: line & color logic only
Puzzle Description Suppressed:Click below to view spoilers
#1: Gator (Gator) on Mar 18, 2010 [HINT]
Comment Suppressed:Click below to view hints#2: Adam Nielson (monkeyboy) on Mar 20, 2010
Ditto #1.#3: Cyrnus (cyrnus) on Dec 10, 2020 [HINT]
Comment Suppressed:Click below to view hints#4: BlackCat (BlackCat) on Oct 9, 2021
great illustration of a difficult subject.
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