noun
maka dai dai shogi
A large historical shogi variant played on a 19×19 board. The term is a proper noun referring to this specific game.
摩訶大大将棋は、19×19の盤で遊ぶ巨大将棋の一種です。
Maka dai dai shogi is a type of giant shogi played on a 19×19 board.
From 摩訶 (maka, 'great', a Buddhist term) + 大大 (daidai, 'large large') + 将棋 (shōgi, 'shogi'). The exact historical derivation is uncertain; the name emphasizes the game's enormous scale.