PyChess Variants provides a server for chess variants, according to its repository description.
18xx
The 18xx project provides an online platform where users can play 18xx games.

About 18xx
18xx is the source repository for 18xx.games, an open-source website for playing 18xx games online. All titles are published with permission from their designers or publishers, and using a title elsewhere requires contacting the relevant designer or publisher for permission.
Key features
- Submit issues and pull requests on GitHub
- Development discussion in Slack channels #18xxgames and #18xxgamesdev
- Contact the team on Slack to add a game to the site
18xx at a glance
- Website
- github.com/tobymao/18xx
- Category
- Gaming › Tabletop & Board Games
- Type
- Open-source project
- Pricing
- Free
- Details verified
- Oct 22, 2026 · Official source
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
18xx alternatives
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