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Thread for puzzle Negative Detector. Hints are OK, but please no full solutions.

 

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Start at 0. Each blue-red data pair has a sum of:
((-1 * # of reds) + (+1 * # of blues))

so 1 blue and 1 adjacent red is (+1) + (-1) (except at the gauge).

Turn on red when the overall total of the pairs is negative, then reset the total and repeat the whole process. You should reach a total of "-1" four times (meaning you turn on red four times).

masterluk, 18 months ago.

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