lichess-opening-explorer

Wrapper for the Lichess Opening Explorer public API written in node.js

Usage

const LichessOpeningExporer = require('lichess-opening-explorer');
let explorer = new LichessOpeningExporer();
 
explorer.analyze('rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1', {
    master: false,
    variant: 'standard',
    speeds: ['blitz', 'rapid', 'classical'],
    ratings: [2000, 2200, 2500]
  })
  .then(analysis => {
    // do something genious
  })
  .catch(err => {
    console.error(err);
  });

name	type	default	description
master	boolean	false	whether you want to filter masters games
fen	string	required	FEN of the position to look up
variant	string	required	one of standard, antichess, chess960, horde, racingKings, threeCheck, atomic, crazyhouse or kingOfTheHill
speeds[]	list	none	bullet, blitz, rapid, and/or classical
ratings[]	list	none	rating groups ranging from their value to the next higher group: 1600, 1800, 2000, 2200 and 2500 to unlimited

The Lichess server will render a json object like the following:

{ white: 11744296,
  draws: 1504402,
  black: 10888977,
  moves:
   [ { uci: 'e2e4',
       san: 'e4',
       white: 5903282,
       draws: 737962,
       black: 5675329,
       averageRating: 2115 },
     { uci: 'd2d4',
       san: 'd4',
       white: 3694010,
       draws: 489599,
       black: 3351940,
       averageRating: 2126 },
     { uci: 'g1f3',
       san: 'Nf3',
       white: 828210,
       draws: 109023,
       black: 659688,
       averageRating: 2139 },
     { uci: 'c2c4',
       san: 'c4',
       white: 637454,
       draws: 83480,
       black: 553208,
       averageRating: 2125 },
     { uci: 'f2f4',
       san: 'f4',
       white: 122785,
       draws: 15239,
       black: 124377,
       averageRating: 2096 },
      ...
     { uci: 'g2g4',
       san: 'g4',
       white: 21904,
       draws: 2366,
       black: 24138,
       averageRating: 2097 } ],
  averageRating: 2121,
  recentGames:
   [ { id: 'om9zBaOt',
       winner: 'black',
       speed: 'blitz',
       white: [Object],
       black: [Object],
       year: 2018 },
      ...
     { id: 'ekRTkDVA',
       winner: 'black',
       speed: 'blitz',
       white: [Object],
       black: [Object],
       year: 2018 } ],
  topGames:
   [ { id: '3JaJlJ9M',
       winner: 'black',
       speed: 'blitz',
       white: [Object],
       black: [Object],
       year: 2016 },
      ...
     { id: 'rh60jEpN',
       winner: 'black',
       speed: 'blitz',
       white: [Object],
       black: [Object],
       year: 2016 } ] }