sashite-lcn

https://github.com/sashite/lcn.rb

LCN (Location Condition Notation) provides a rule-agnostic format for describing location conditions in abstract strategy board games. This gem implements the LCN Specification v1.0.0 with a modern Ruby interface featuring immutable condition objects and functional programming principles. LCN enables standardized representation of environmental constraints on board locations using reserved keywords ("empty", "enemy") and QPI piece identifiers with CELL coordinate system integration. Perfect for movement validation, pre-condition checking, constraint evaluation, and rule-agnostic game logic requiring precise location state requirements across multiple game types and traditions.