The board is the grid of orbs in which you match orbs. The board is usually 6×5 in dimension (six orbs wide, five orbs long), but can be 5×4 (now archaic) or 7×6, depending on the leader or helper used and/or the dungeon restrictions.
Board Makers
Active Skills that change all orbs on the board to a new set of orbs within a set of colors are called “board makers,” or for short, “boards.” For example, One-Eyed Hell Phantom Demon, Zuoh has an active that makes a tricolor board ( Fire/Wood/Dark), while Black Calamity Goddess of Power, Kali makes a rainbow board, or a board of all six colors ().