Platinum Chess

by BETA PROJECTS · Back to the game

Chess engine

Stockfish 16 by the Stockfish developers, compiled to WebAssembly as Stockfish.js by Nathan Rugg and Chess.com, based on stockfish.wasm by Niklas Fiekas and Hiroshi Ogawa. Licensed under the GNU General Public License v3. Complete source code: github.com/nmrugg/stockfish.js and github.com/official-stockfish/Stockfish. The engine files in js/engine/ are distributed unmodified.

Rules library

chess.js by Jeff Hlywa and contributors, BSD 2-Clause license. Source: github.com/jhlywa/chess.js.

3D graphics

Three.js by Ricardo Cabello and contributors, MIT license. Source: github.com/mrdoob/three.js. The 3D chess pieces, boards, materials and rooms are generated in code by BETA PROJECTS.

Variant rules

chessops by Niklas Fiekas and contributors (the rules library behind lichess.org), GNU GPL v3 or later. Source: github.com/niklasf/chessops. Includes @badrap/result by Badrap Oy (MIT). The vendored files in js/vendor/chessops/ are unmodified except that one import path points to the local copy of @badrap/result. The variant AI for King of the Hill, Three-check and Horde is written by BETA PROJECTS.

Puzzles

Every puzzle was generated by BETA PROJECTS: engine games at club strengths were searched with Stockfish 16 for moments where a mistake left exactly one winning reply, and the solutions were verified move by move.

Opening names

Opening classification and the explorer's named lines from lichess-org/chess-openings, released under the CC0 Public Domain Dedication.

Piece sets

Piece SVGs as distributed in the lichess.org repository.

Everything else

Board textures, sounds, interface and game code by BETA PROJECTS. Fonts: Cormorant Garamond, Inter and JetBrains Mono via Google Fonts (SIL Open Font License).