I asked Astra to make playable 4D chess

A web-based 4D chess game, generated with Astra, lets you play against a computer or a friend on a 4x4x2x2 board. The rules extend standard chess to four spatial dimensions: rooks move along one axis, bishops along two, queens along any number, knights jump with a two-step along X or Y, and pawns capture diagonally in 3D. The tesseract projection visualizes the fourth dimension, and checkmate is the goal. Includes a full rule guide and source code.