sfmv/ - the variant engine of the Variants page (Crazyhouse, Atomic, Giveaway, Horde)

What it is
  Multi-variant Stockfish compiled to WebAssembly: the npm package "stockfish.js", version 10.0.2
  (engine id "Stockfish 2019-08-15 Multi-Variant", by D. Dugovic, F. Fichter and others; web build by
  Niklas Fiekas). The two files here are that package's files, not changed:
      stockfish.wasm.js   (the Web Worker script)
      stockfish.wasm      (the engine)
  One thread, no SharedArrayBuffer: it needs no special server headers.
  The server must send stockfish.wasm as "application/wasm".

Why it is here
  The Android app plays these four games with Fairy-Stockfish (engine/variant/FairyEngine.kt).
  That build cannot run in a browser without site-wide server headers, so the website uses this
  engine, which knows the same four games. Its rules were checked against ../engine.js move for move.
  Used by ../play.js (the object "MV") and described in ../think.js (mvName, mvLimit, mvCommands ...).
  If these files are missing, the page still works: the built-in bot (../bot.js) plays.

Licence
  GNU General Public License, version 3 - see Copying.txt in this folder.
  Complete source: https://github.com/niklasf/stockfish.js  (branch "ddugovic", tag v10.0.2)
                   https://github.com/ddugovic/Stockfish