EPIN (Extended Piece Identifier Notation) extends PIN to provide style-aware piece representation in abstract strategy board games. This gem implements the EPIN Specification v1.0.0 with a modern Ruby interface featuring immutable identifier objects and functional programming principles. EPIN adds derivation markers to PIN that distinguish pieces by their style origin, enabling cross-style game scenarios and piece origin tracking. Represents all four Game Protocol piece attributes with full PIN backward compatibility. Perfect for game engines, cross-tradition tournaments, and hybrid board game environments.

A Ruby implementation of GAN (General Actor Notation) v1.0.0 specification for identifying game actors in abstract strategy board games. GAN combines Style Name Notation (SNN) and Piece Identifier Notation (PIN) with a colon separator to provide complete, unambiguous piece identification. Represents all four fundamental piece attributes: Type, Side, State, and Style. Enables cross-style gaming, immutable transformations, and component extraction with to_pin/to_snn methods. Built on sashite-snn and sashite-pin gems.

PNN (Piece Name Notation) extends PIN to provide style-aware piece representation in abstract strategy board games. This gem implements the PNN Specification v1.0.0 with a modern Ruby interface featuring immutable piece objects and functional programming principles. PNN adds derivation markers to PIN that distinguish pieces by their style origin, enabling cross-style game scenarios and piece origin tracking. Represents all four Game Protocol piece attributes with full PIN backward compatibility. Perfect for game engines, cross-tradition tournaments, and hybrid board game environments.