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MIT Mystery Hunt Puzzle Index: Keyword Data

signal loop (logic puzzle)

In this logic puzzle type, a grid is provided with black or white circles in some cells. You must draw a loop through all the cells except the ones with black circles. The loop cannot turn on squares with white circles. In the variant Antisignal Loop, the loop avoids squares with white circles and turns in squares with black circles.

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MIT Mystery Hunt 2015 Polyglot

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