v1.0.0-beta.0

Changes

This is a major version update and there are many breaking changes. Please ead below for more info.

Typescript

chess.js has been rewritten in TypeScript. Exported types are as follows:

• Chess object
• Piece
• Color
• Square
• PieceSymbol
• Move

Exceptions

The following functions no longer return null in the event of an error. They now throw exceptions. This change was made to provide the user with more informative error messages.

• .load()
• .loadPgn()
• .move()
• Chess() constructor

Function Names

The functions below have been renamed and are now camel-cased:

• game_over -> isGameOver
• in_check -> isCheck
• in_checkmate -> isCheckmate
• in_draw -> isDraw
• is_stalemate -> isStalemate
• in_threefold_repetition -> isThreefoldRepetition
• insufficient_material -> isInsufficientMaterial
• load_pgn -> loadPgn
• set_comment -> setComment
• get_comment -> getComment
• get_comments -> getComments
• delete_comment -> deleteComment
• delete_comments -> deleteComments
• validate_fen -> validateFen

Improvements

• Change .load to throw an exception when loading invalid FEN (#ac977ed)
• Change .move to throw an exception on illegal move (#8523db8)
• Change .loadPgn to throw an exception when encountered error (#TODO)
• Allow the user to omit castling rights, en passant square, and move numbers when calling .load (#8523db8)
• Add isAttacked to determine attackers of a specific square (#9b49454)
• Validate king presence in validateFen (#a137478)
• Allow spaces between the bracket and tag in PGN header (#5f48a68)
• Allow user to specify a promotion piece (when supplying a verbose move) even if the move is not a promotion (#8e71084)
• Add a fen field FEN position when calling .history

Bug Fixes

• Fix loadPgn() to handle PGN without any moves (#d12f78f)
• Fix pgn() export when comment precedes black to move (#4fd6069)