Found in 1 comment on Hacker News
JoeDaDude · 2017-10-11 · Original thread
Not just for children! For some serious treatment, see:

The Dots and Boxes Game: Sophisticated Child's Play by Elwyn R. Berlekamp [1].

[1]. https://www.amazon.com/Dots-Boxes-Game-Sophisticated-Childs/...

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