Indie dev builds playable 3D chess-on-a-cube game with GPT-6 Astra in just 4 days
digitalml · reddit · 2026-09-09
A developer used OpenAI's new GPT-6 Astra via Codex to ship Chess Cubed — chess wrapped around the six connected faces of a cube — in just 4 days.
- Rules: standard piece moves, four extra pawns per side, at most one edge crossing per move, diagonals capped at five steps, pawn promotion on the opposite face's central 4×4
- Workflow: Astra drove Blender via MCP for all 3D assets, built the web version in babylon.js, then ported to iOS/Android in Unreal Engine also via MCP; music and SFX were AI-generated too
- Cost: the xHigh-tier Astra burn ate 110% of his weekly quota on the $200 plan
- Shipped with single-player CPU at multiple difficulties, full multiplayer with chat, and multiple skins — live at playchesscubed.com
Related event: Dev Builds Cube Chess in 4 Days with GPT-6 Astra(2 posts)→
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