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Author: CalcPlex
Type: TI-84 Evo Game (Python)
Description: Every press toggles a plus-shaped patch of lights; darken the whole board in as few moves as you can. Hints show the optimal next press.
How to Install: use Send to Calculator above (Chrome, Edge, or a Chromebook), or grab the .py file and follow the TI-84 Evo Games Tutorial.