https://github.com/glolichen/potato-chess-browser

A short and simple chess engine that works in the browser
https://github.com/glolichen/potato-chess-browser

algorithm chess engine javascript webassembly

Last synced: about 17 hours ago
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A short and simple chess engine that works in the browser

• Host: GitHub
• URL: https://github.com/glolichen/potato-chess-browser
• Owner: glolichen
• License: gpl-3.0
• Created: 2022-03-20T06:55:44.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2023-07-28T14:10:58.000Z (over 1 year ago)
• Last Synced: 2023-07-28T15:26:04.984Z (over 1 year ago)
• Topics: algorithm, chess, engine, javascript, webassembly
• Language: C++
• Homepage: https://glolichen.github.io/potato-chess-browser
• Size: 4.33 MB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Potato Chess

## Fork of https://github.com/glolichen/potato-chess-uci

A chess engine written in C++ and compiled to Web Assembly

Features:

 * Written in C++ and compiled to web assembly using [Emscripten](https://github.com/emscripten-core/emscripten)

   * Compiled using the command `em++ src/*.cpp -o js/engine.js -lembind -O3 -sALLOW_MEMORY_GROWTH`

   * Memory growth must be allowed as memory usage usually exceeds 16MB

 * Can also be used as a desktop app (electron) for maximum performance

 * Bitboard-based move generator

 * 30-100 million nodes per second move generator (depends on platform and position)

   * Keeps track of pinned pieces and the direction they are pinned

   * Keeps track of squares attacked by the opponent to prevent king from moving there

 * Tapered evaluation (uses game phase to "weigh" the importance of midgame score to endgame score) with piece tables

 * Minimax search with Alpha-Beta pruning

 * Transposition table with Zobrist Hashing

 * Move ordering is used to guess the strength of moves to speed up AB pruning

 * Syzygy endgame tablebase (powered by [Lichess](https://github.com/lichess-org/lila-tablebase))