ReactChess (Live link)

JavaScript implementation of the game of Chess.

• Leverages React Drag-and-Drop for the user interface, and responds seamlessly to mobile devices for touch screen interaction.
• Adheres to complete set of Chess rules, including castling, en passant, and pawn promotion.
• Chess engine driven by Web Worker API so that expensive move computations are performed on a separate thread from the user interface.
• Engine designed to balance time and accuracy considerations, with most moves made within fractions of a second.
• AI makes moves based on self-designed heuristics taking into account positional, material, and tactical chess theory.