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The best free, adless draughts server
(lidraughts.org)
For the non-British among us, Draughts (drafts) is a boxed game also known as Checkers.
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.