The lichess code is actually open source, although not in a simple component for people to use: https://github.com/ornicar/lila/search?q=captcha https://github

The lichess code is actually open source, although not in a simple component for people to use: https://github.com/ornicar/lila/search?q=captcha https://github.com/ornicar/lila/search?q=captcha The lichess development process is actually very worthy of praise, lots of useful stuff linked from: https://lichess.org/source https://lichess.org/source