What about Makruk or Thai Chess? It would be really nice to add it to BK, since we have already shogi (japanese chess), and xianqi (chinese chess), not to speak about go.
World Champion Vladimir Kramnik says about this variant: "Makruk Thai is more strategic than International Chess, [...] You have to plan your operations with total care since Makruk Thai can be compared to an anticipated endgame of International Chess."