FYI, I've got an international copyright on the name Castle Chess and published it in 2020. You should consider a name change!
https://starcaptaindread.itch.io/castle-chess
http://starport420.online/castlechess
https://www.thegamecrafter.com/games/castle-chess1
https://www.thegamecrafter.com/games/castle-chess-emperors-expansion 