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]
Wow. Great puzzle. It says solvable by logic alone, but I gave up quickly and used edge logic. Even with that, it was still hard.#2: Adam Nielson (monkeyboy) on Mar 20, 2010
Ditto #1.#3: Cyrnus (cyrnus) on Dec 10, 2020 [HINT]
I too was stuck at first using only color and line logic, then I noticed that the 2 black in row 29 could only go in 2 places. After that it solved with line and color.#4: BlackCat (BlackCat) on Oct 9, 2021
great illustration of a difficult subject.
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