Legal
Credits
CheckMeta64 builds on external data, open-source tools, and visual assets. We acknowledge the projects that make this possible.
Data source
Game data in CheckMeta64 are informed in part by material from The Week in Chess.
Source: The Week in Chess (TWIC)
Engine
CheckMeta64 uses a single-thread WebAssembly build of Stockfish 18 for engine analysis.
The distributed engine is Stockfish.js 18 by Nathan Rugg / Chess.com, LLC.
It is based on Stockfish, the open-source chess engine by Tord Romstad, Marco Costalba, Joona Kiiski, Gary Linscott, and other contributors, distributed under the GNU General Public License v3.0.
Stockfish project: stockfishchess.org
Browser distribution: nmrugg/stockfish.js
The shipped files are the single-thread `stockfish-single.js` and `stockfish-single.wasm` assets served from the public engine directory.
Neural-network attribution: Linmiao Xu (linrock)
License, attribution, and author files are distributed alongside the engine assets in the public application bundle.
Visual assets
Chess piece SVGs © Colin M. L. Burnett (Cburnett).
Licensed under CC BY-SA 3.0 and sourced from Wikimedia Commons.
The SVG files are included unmodified in the public chess piece assets used by the app.