I added mention of the pO notation for fast castling to the XBetza section, and dressed up the article with two Interactive Diagrams for exemplifying flexible and fast castling.
I also added mention of the K~b1 notation for unambiguously specifying flexible castlings.
I added mention of the pO notation for fast castling to the XBetza section, and dressed up the article with two Interactive Diagrams for exemplifying flexible and fast castling.
I also added mention of the K~b1 notation for unambiguously specifying flexible castlings.