Licenses

Stockfish

Game reviews on the web are analysed by Stockfish 19, a free chess engine, running in your browser. KnightVision sends your browser the engine exactly as the stockfish.js project released it (version 19.0.1, its full single-threaded build), without changes.

Stockfish and stockfish.js are free software, licensed under the GNU General Public License, version 3 (GPL-3.0). You may copy, change and share them under that license. Nothing in our Terms of Service limits those rights.

• License text: COPYING.txt
• The engine files, their SHA-256 hashes and where their source is: SOURCE.txt

Source code

• stockfish.js 19.0.1, the build KnightVision serves (tag v19.0.1, commit 0d5dd7944f88c817c07a26bc4fb1905d5f9c46d6): github.com/nmrugg/stockfish.js
• Stockfish 19, the engine it is built from (release sf_19, commit edb0d9db): github.com/official-stockfish/Stockfish
• The neural network built into the engine, nn-1a298aa575a0.nnue (SHA-256 1a298aa575a085434d29027978dc36867fe9c5bcea9376654b7a8eba1e52dfc2): tests.stockfishchess.org
• The engine was compiled with Emscripten 6.0.9.

Written offer

For at least three years after KnightVision last serves these engine files, we will give anyone who asks a copy of the complete corresponding source code for them, at no charge. Ask by email at abrahamobubo@gmail.com.