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.

A W move can look diagonal in the drawing and still count as a straight rook move.
  1. Keyframe

    I asked Astra to try and fix an issue in my codebase I've been battling for a month. Day and half later on high and it's still circling the drain. Seems like with each new model we praise it based on toys, but then reality hits the ground soon and we wait for the next model. In the meantime, good ol' brain.

  2. cwmoore

    I made 3D sudoku, books on paper called SUDOCUBE, with a coded index for the clues, using Opus 4.7 I think it was, which came up with the algorithm and extended my own pre-LLM Kakuro codebase:

    https://www.kakurokokoro.com/sudocube

  3. hermannj314

    Excellent job, this was very fun to play.

    I liked the explanations, graphics, interactive tesseract, all nice attentions to detail.

    How much guidance did you give Astra? Did you give a single prompt, an example site to mimic or was there more to the design and make process?

  4. amelius

    If it is only 4x4x2x2 then this has fewer hypersquares than a proper version of 4D tic tac toe, e.g.:

    https://csclub.uwaterloo.ca/~r345liu/

  5. skyfantom

    Not astra made but my mom and nephew say it's a fun thing to play https://chesspoly.com (https://apps.apple.com/gb/app/chesspolly/id6798789898)

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2026-09-06