Thanks a lot for this very nice library. As far as I understand, the only way to add a move would be

chess.move('e2','e4');

However, there a couple of notations, for example, Stockfish and Lc0 produce moves like e2e4 and if you play at chess.com they notate it like e4 or Nf3 etc.

I've used chess.js before and that lib has a very extended support for moves, but that project seems dead to me. Any plans to support that?

I just ran into the following situation with castling. The fen is

 1r2k2r/ppp2ppp/8/3N1b2/3n4/8/PP2PPPP/R3KB1R w KQk - 0 13

(source)

White to move, which does: e1c1

import { Chess } from 'chess-base';
const fen = '1r2k2r/ppp2ppp/8/3N1b2/3n4/8/PP2PPPP/R3KB1R w KQk - 0 13';
const chess = new Chess(fen);
chess.move('e1c1');

Which gives an error ending with: castling target

We've discussed this before ( #3 ) and I must say that I find the castling notation very confusing. Any ideas what might be the problem in this situation?

Thanks for adding this already. I noticed two issues (I think)

First one is castling. Consider the following

import { Chess } from 'chess-base';
const chess = new Chess('rnbq1rk1/p3bpp1/1p2pn1p/2ppN3/3P3B/2N1P3/PPP1BPPP/R2QK2R w KQ c6 0 9');

When I try to castle

 chess.move('e1', 'g1'); // --> Throws error

It seems that you can only castle with

chess.castlingKing();  // or
chess.move('O-O');    // <- very nice!!

It would be nice to support 'e1', 'g1' notation (I get this notation from chess engines)

The other issue I noticed is with the following fen string 8/P7/7k/8/8/8/K7/8 w - - 0 61

If the pawn moves from a7 to a8 you cannot do

chess.move('a8', 'q');

but instead you have to do

chess.move('a7', 'a8', 'q');

Hope this makes any sense, cheers!