For those interested in big board variants, Chu Shogi is now

For those interested in big board variants, Chu Shogi is now playable on lishogi.org : r/chessvariants

Tai shogi - Wikiwand

Are there any Ko Shogi apps out of Japan I can get for my iPad? - Quora

Debian Games Board packages

Variant] Chushogi · Issue #472 · WandererXII/lishogi · GitHub

Shogi - Wikipedia

Which is a better game, chess or shogi? - Quora

Shogi Board

Some Traditional Enlarged Forms of Chess