Dai dai shogi

Dai dai shōgi (大大将棋 'huge chess') is a large board variant of shogi (Japanese chess). The game dates back to the 15th century and is based on the earlier dai shogi. Apart from its size, the major difference is in the range of the pieces and the “promotion by capture” rule. It is the smallest board variant to use this rule.

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 dai dai shogi are not clear. Different sources often differ significantly in the moves attributed to the pieces, and the degree of contradiction (summarised below with the listing of most known alternative moves) is such that it is likely impossible to reconstruct the "true historical rules" with any degree of certainty, if there ever was such a thing. It is not clear if the game was ever played much historically, as the few sets that were made seem to have been intended only for display.

The objective is to capture the opponent's king. Unlike standard shogi, pieces may not be dropped back into play after being captured.

Two players, Black and White (or sente and gōte), play on a board composed of squares in a grid of 17 ranks (rows) by 17 files (columns) with a total of 289 squares. The squares are undifferentiated by marking or color.

Each player has a set of 96 wedge-shaped pieces of 64 different types. In all, the players must remember 68 different moves. The pieces are of slightly different sizes, from largest to smallest (or roughly most to least powerful) they are:

Many of the English-language names are chosen to correspond to their rough equivalents in Western chess, not necessarily as translations of the Japanese names.

Each piece has its name in the form of two Japanese characters marked on its face. On the reverse side of some pieces are one or two other characters, often in a different color (e.g., red instead of black); this reverse side is used to indicate that the piece has been promoted during play. The pieces of the two sides do not differ in color, but instead each piece is shaped like a wedge, and faces forward, toward the opposing side. This shows who controls the piece during play.

Listed below are the pieces of the game and, if they promote, which pieces they promote to.

Relatively few pieces promote (or demote) in dai dai shogi. A few pieces (*asterisked) only appear upon promotion.

...
Wikipedia