Mad Queen Chess — Support
Need help with a game, your purchase or restoring access? Have a suggestion or a question about privacy?
Please complete the form below. For technical issues, include your device model, app version and a description of what happened. Include your email address so we can reply.
Please do not send passwords or payment-card details.
MQC is powered by Stockfish engine, that is why it is so hard to beat it!
Stockfish licence and source code
Mad Queen Chess uses Stockfish.js 10.0.2, based on the Stockfish chess engine, with contributions from the Stockfish developers and Niklas Fiekas’s JavaScript port.
Stockfish.js is distributed under the GNU General Public License, version 3 (GPLv3). The licence and the exact matching engine source code, including build scripts, are available free of charge through the links below.
Download the matching source code ZIP