Godot Chess Engine in pure gdscript

This is a complete, rules correct, chess engine written in pure gdscript. Handles all those tricky edge cases, such as castling, promotions, en passant and pins.

This is not a chess AI. It doesn't play chess at any level, but keeps track of the board and ensures only legal moves are used, and are able to ask for all available legal moves.

AGPL License. If you are unwilling to contribute the code for your game, an inexpensive ($5) paid license is available.