Open source

Built in the open, with the licenses intact.

Relay Room’s extension, realtime protocol, SpaceTimeDB module, and website source are available in every source release. The project does not copy the Lichess brand or embed lichess.org; it uses documented public broadcast feeds and upstream open-source libraries.

Relay Room

Original Relay Room code is MIT licensed. The guest-board browser bundle is distributed under GPL-3.0-or-later because it links Chessground and chessops.

Chessground

The guest board uses Chessground, the GPL-3.0-or-later chessboard UI maintained by Lichess contributors. Relay Room retains its copyright and license notices.

chessops

Legal moves, PGN parsing, positions, and Lichess tree-path compatibility use chessops, also GPL-3.0-or-later.

Broadcast data

Game metadata and PGN come from the public Lichess API. Relay Room links back to the original broadcast and identifies Lichess as the data source.

Source and license

Download the complete corresponding source. It includes the guest client, build script, extension, generated database bindings, protocol, tests, and third-party notices. Read the GPL-3.0 license. This software comes without warranty.