The official chess web-based app of the BoldChess.com website.

It is a responsive web GUI for the Stockfish chess engine with analysis, evaluation, and graphs. It also comes with Leela Chess Zero (LCZero) neural network evaluation.

Note: This app is originally based on PeshkaChess and modified for BoldChess.com.

Our mission from this project is to develop a modern responsive free and open source web-based chess app powered by the Stockfish chess engine.

https://boldchess.com/analysis/

https://labinatorsolutions.github.io/boldchess-web-app/

• Ability to load your chess position or game using FEN, PGN, or a move list.
• Ability to set up your pieces manually in edit mode.
• Ability to browse game history with arrows or mouse wheel.
• Ability to list all legal moves and show them on the chessboard.
• Ability to analyze positions and all legal moves with the javascript version of the Stockfish chess engine.
• Ability to display an evaluation graph while visualizing blunders in different colors.
• Ability to open a position or game in a new window via a given URL.
• Ability to play against the computer (Stockfish Chess Engine) and set its difficulty level.
• Ability to see an evaluation by the Leela Chess Zero (LCZero) neural network.
• Ability to detect an opening category or ECO code.
• Ability to choose the styling of the chessboard.
• Ability to print arrows or mark squares on the chessboard.
• Relevant squares on the chessboard are visualized according to the static evaluation terms of the Stockfish chess engine.
• Dark interface with pitch black background that is battery-saving for OLED screens and highly intuitive.
• Support for PCs, tablets, smartphones, and touch devices.

• Chessboard
• List of Moves
• Game History
• Graph
• Chess Openings
• Static Evaluation
• Edit Board

• To open your FEN or PGN, copy your FEN or PGN to clipboard and paste it in the input box above the chessboard.
• To browse the game, use the mouse wheel on the chessboard or the arrow buttons.
• To open or hide windows, click on the small icons found at the top of the GUI.
• To play against the engine or set its difficulty level, click on the hamburger menu.
• To change the styling of the board, flip the board, or open it in a new window, click on the hamburger menu.

• Download or clone this repository.
• Upload the unzipped folder of this repository to your web server then view it from your web browser.

• Download or clone this repository.
• Install a web server locally to test effectively the GUI. A fast approach is download and install XAMPP.
• Copy the folder of the repository to the (htdocs) directory then view it locally from your web browser.

https://github.com/LabinatorSolutions/boldchess-web-app/issues

We welcome all developers to contribute to this repository by adding features or fixing bugs. The source codes will always be free and open source.

List Of Current Contributors:

https://github.com/LabinatorSolutions/boldchess-web-app/graphs/contributors

GNU GPLv3: https://www.gnu.org/licenses/gpl-3.0-standalone.html

• PeshkaChess
• Stockfish
• Stockfish.js (nmrugg)
• Stockfish.js (niklasf)
• LeelaChessZero
• LC0-JS
• TensorFlow
• BoldChess
• Labinator