Define Chess Variants with Code

ChessLang is a domain-specific language for creating custom chess variants easily. From simple rule tweaks to entirely new games.

king-of-the-hill.cl

game: "King of the Hill"
extends: "Standard Chess"

board:
  zones:
    hill: [d4, d5, e4, e5]

victory:
  add:
    hill: King in zone.hill

Simple Yet Powerful

Define victory conditions, custom pieces, and complex rules with an intuitive syntax. ChessLang compiles your code into a playable game instantly.

From simple YAML config to full scripting power

Play your variants instantly in the browser

Comprehensive documentation with interactive examples

Share your creations with a simple link

Jump into the playground and start defining your own chess variants.