cm-chess-engines-runner

Working engines

• https://github.com/niklasf/stockfish.js

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

• https://github.com/shaack/cm-polyglot

  • An engine to play moves from a polyglot (.bin) openings file.

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

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

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