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.

QPI (Qualified Piece Identifier) provides a rule-agnostic format for identifying game pieces in abstract strategy board games by combining Style Identifier Notation (SIN) and Piece Identifier Notation (PIN) primitives. This gem implements the QPI Specification v1.0.0 with a modern Ruby interface featuring immutable identifier objects and functional programming principles. QPI enables complete piece identification with all four fundamental attributes (family, type, side, state) while supporting cross-style gaming environments. Perfect for multi-tradition board games, hybrid gaming systems, and game engines requiring comprehensive piece identification across different game styles and traditions.