Because of the terse and often incomplete wording of the historical sources for the large shogi variants, except for chu shogi and to a lesser extent dai shogi (which were at some points of time the most prestigious forms of shogi being played), the historical rules of wa shogi are not clear. Different sources differ significantly in the moves attributed to the pieces. Presented here are the piece movements that are somewhat standard among modern players of wa shogi, among which the game is played with drops.