doc gnubg

doc/blog/game-state-notation.md

@@ -48,3 +48,4 @@ Non dénuée d'avantages :
 Backgammon notation : https://nymann.dev/2023/05/16/Introducing-the-Backgammon-Position-Notation-BPN-A-Standard-for-Representing-Game-State/
 
 GnuBg : https://www.gnu.org/software/gnubg/manual/html_node/A-technical-description-of-the-Position-ID.html
+- implémentation rust https://github.com/bungogood/bkgm/blob/main/src/position.rs

store/src/board.rs

@@ -34,6 +34,7 @@ impl Board {
         Board::default()
     }
 
+    // maybe todo : operate on bits (cf. https://github.com/bungogood/bkgm/blob/a2fb3f395243bcb0bc9f146df73413f73f5ea1e0/src/position.rs#L217)
     pub fn to_gnupg_pos_id(&self) -> String {
         // Pieces placement -> 77bits (24 + 23 + 30 max)
         // inspired by https://www.gnu.org/software/gnubg/manual/html_node/A-technical-description-of-the-Position-ID.html