cm-engine-runner v1.2.1

cm-engine-runner

A JavaScript module to act as a framework for running chess engines in the browser.

Working engines

Stockfish 10

• File: engines/stockfish-v10-niklasf.js
• Type: WebWorker
• Stockfish version: 10
• Latest Version with WebWorker
• https://github.com/niklasf/stockfish.js

Polyglot opening books

• An engine to play moves from a polyglot (.bin) openings file.
• https://github.com/shaack/cm-polyglot

Stockfish 14

Not implemented yet, does not work in Safari as of 2021-12-12

• Type: WASM
• Stockfish version: 14
• Latest js version, multithreaded
• https://github.com/nmrugg/stockfish.js

Stockfish Skill Levels

this.uciCmd('setoption name Skill Level value ' + (LEVELS[props.level][1]))

• Level 0 = 1100 ELO rating
• Level 1 = 1165 ELO rating
• Level 2 = 1230 ELO rating

As you can see the strength is increasing by 65 ELO points for each level, so that;

• Level 20 = 2570 ELO rating.

And depth to ELO: https://chess.stackexchange.com/questions/8123/stockfish-elo-vs-search-depth?rq=1

References

• UCI reference
• Official Stockfish
• stockfish.js
  • https://github.com/mcostalba/Stockfish
  • https://github.com/niklasf/stockfish.js (stockfish-v10-niklasf.js)
  • https://github.com/bjedrzejewski/stockfish-js <= supports opening books
• chess-tools
• https://www.chessprogramming.org/Opening_Book#Formats
• https://github.com/evilwan/stakelbase

Find more high quality JavaScript modules from shaack.com on our projects page.