Question 1

How to validate a chess move with chess.js?

Accepted Answer

Use the chess.move() method, which validates moves against standard chess rules and returns false or null for invalid moves, as shown in the documentation.

Question 2

chess.js vs chessboard.js – what's the difference?

Accepted Answer

chess.js handles game logic like move generation and validation, while chessboard.js is a UI library for displaying boards; they are often used together for complete chess applications.

Question 3

Does chess.js support chess variants?

Accepted Answer

No, chess.js is designed for standard chess rules only. For variants like Fischer Random, you would need to modify the library or seek alternatives.

Question 4

How to generate all legal moves in a position?

Accepted Answer

Call chess.moves() to get an array of all legal moves for the current board state, useful for analysis or engine building.

Question 5

Can chess.js be used with React for a chess app?

Accepted Answer

Yes, chess.js can manage game state in React apps, but you'll need to pair it with React components for the UI, as it doesn't provide visual elements.

Question 6

How to handle PGN files with chess.js?

Accepted Answer

Use chess.pgn() to output games in PGN format, and load PGNs by parsing them into moves, though loading might require custom parsing logic.

chess.js

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