Tai shogi
Tai shogi is a large-board variant of shogi. The game dates to the 15th century and is based on earlier large-board shogi games. Before the discovery of taikyoku shogi in 1997, tai shogi was believed to be the largest playable chess variant, if not board game, ever. One game may be played over several long sessions and require each player to make over a thousand moves. It was never a popular game; indeed, a single production of six game sets in the early 17th century was a notable event.
Like other large-board variants, but unlike standard shogi, the game is played without drops, and uses a promotion-by-capture 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, the historical rules of tai shogi are not clear. Different sources often differ significantly in the moves attributed to the pieces, and the degree of contradiction 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.
Rules of the game
Tai shogi is very similar to other large-board shogi variants: dai dai shogi, maka dai dai shogi, and tenjiku shogi. Where the same pieces are found, they move the same way. The only difference is in how these pieces promote, which is distinct for each shogi variant. The one variant which is an exception to this generalization is the largest, taikyoku shogi, where the moves differ as well.Objective
The objective of the game is to capture the opponent's emperor and prince. When the last of these is captured, the game ends. There are no rules for check or checkmate; however, in practice a player resigns when checkmated.Game equipment
Two players, Black and White, play on a board ruled into a grid of 25 ranks and 25 files, for a total of 625 squares. The squares are undifferentiated by marking or color.Each player has a set of 177 wedge-shaped pieces of 93 types. In all, the players must remember 99 moves for these pieces. The pieces are of slightly different sizes. From largest to smallest they are:
- 1 Emperor
- 1 Prince
- 1 Hook mover
- 2 Long-nosed goblins
- 1 Capricorn
- 2 Peacocks
- 2 Soaring eagles
- 2 Horned falcons
- 2 Queens
- 1 Rushing bird
- 2 Free demons
- 2 Free dream-eaters
- 2 Water buffalos
- 2 Flying oxen
- 2 Soldiers
- 2 Dragon kings
- 2 Dragon horses
- 1 Lion
- 2 Side chariots
- 2 Rooks
- 2 Bishops
- 2 White horses
- 2 Whales
- 2 Standard bearers
- 1 Vermillion sparrow
- 1 Turtle-snake
- 1 Blue dragon
- 1 White tiger
- 1 Right chariot
- 1 Left chariot
- 2 Side dragons
- 2 Doves
- 1 She-devil
- 1 Golden bird
- 1 Great dragon
- 2 White elephants
- 1 Lion dog
- 1 Wrestler
- 1 Guardian of the Gods
- 1 Buddhist devil
- 2 Golden deer
- 2 Silver hares
- 2 Fierce eagles
- 1 Old kite
- 2 Violent oxen
- 2 Flying dragons
- 2 Old rats
- 2 Enchanted badgers
- 2 Flying horses
- 2 Prancing stags
- 2 Violent bears
- 2 Side movers
- 2 Vertical movers
- 2 Reverse chariots
- 1 Phoenix
- 1 Kirin
- 2 Poison snakes
- 1 Northern barbarian
- 1 Southern barbarian
- 1 Eastern barbarian
- 1 Western barbarian
- 2 Blind bears
- 1 Drunken elephant
- 1 Neighbor king
- 2 Blind tigers
- 2 Blind monkeys
- 2 Ferocious leopards
- 2 Reclining dragons
- 2 Chinese cocks
- 2 Old monkeys
- 2 Evil Wolves
- 2 Angry boars
- 2 Cat swords
- 2 Coiled serpents
- 1 Deva
- 1 Dark spirit
- 1 Right general
- 1 Left general
- 2 Gold generals
- 2 Silver generals
- 2 Copper generals
- 2 Tile generals
- 2 Iron generals
- 2 Wood generals
- 2 Stone generals
- 2 Earth generals
- 2 Go betweens
- 2 Knights
- 2 Howling dogs
- 2 Donkeys
- 2 Ram's-head soldiers
- 2 Lances
- 25 Pawns
Each piece has its name in the form of two kanji written on its face. On the reverse side of some pieces are one or two other characters, often in a different color ; this reverse side is turned up 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.
Table of pieces
Listed here are the pieces of the game and, if they promote, which pieces they promote to.Piece | Kanji | Rōmaji | Promotes to |
Emperor | 天王 | tennō | — |
Prince | 太子 | taishi | — |
Hook mover | 鉤行 | kōgyō | G |
Long-nosed goblin | 天狗 | tengu | G |
Capricorn | *摩? | makatsu | G |
Peacock | 孔雀 | kujaku | G |
Soaring eagle | 飛鷲 | hijū | G |
Horned falcon | 角鷹 | kakuō | G |
Queen | 奔王 | honnō | — |
Rushing bird | 行鳥†† | gyōchō | free demon †† |
Free demon | 奔鬼 | honki | G |
Free dream-eater | 奔獏 | honbaku | G |
Water buffalo | 水牛 | suigyū | free dream-eater |
Flying ox | 飛牛 | higyū | G |
Soldier | 兵士 | heishi | G |
Dragon king | 龍王 | ryūō | — |
Dragon horse | 龍馬 | ryūme | — |
Lion | 獅子 | shishi | furious fiend |
*Furious fiend | 奮迅 | funjin | — |
Side chariot | 走車 | sōsha | G |
Rook | 飛車 | hisha | G |
Bishop | 角行 | kakugyō | G |
White horse | 白駒 | hokku | G |
Whale | 鯨鯢 | keigei | G |
Standard bearer | 前旗 | zenki | G |
Vermillion sparrow | 朱雀 | suzaku | G |
Turtle-snake | 玄武 | genbu | G |
Blue dragon | 青龍 | seiryū | G |
White tiger | 白虎 | byakko | G |
Right chariot | 右車 | usha | G |
Left chariot | 左車 | sasha | G |
Side dragon | 横龍 | ōryū | G |
Dove | 鳩槃 | kyūhan | G |
She-devil | 夜叉 | yasha | G |
Golden bird | 金翅 | kinshi | G |
Great dragon | 大龍 | dairyū | G |
White elephant | 白象 | hakuzō | G |
Lion dog | 狛犬 | komainu | G † |
*Great elephant | 大象 | taizō | — † |
Wrestler | 力士 | rikishi | G |
Guardian of the Gods | 金剛 | kongō | G |
Buddhist devil | 羅刹 | rasetsu | G |
Golden deer | 金鹿 | konroku | G |
Silver hare | 銀兎 | ginto | G |
Fierce eagle | 猛鷲 | mōjū | G |
Old kite | 古鵄 | kotetsu | long-nosed goblin |
Violent ox | 猛牛 | mōgyū | G |
Flying dragon | 飛龍 | hiryū | G |
Old rat | 老鼠 | rōso | bat |
*Bat | 蝙蝠 | kōmori | — |
Enchanted badger | 変狸 | henri | dove |
Flying horse | 馬麟 | barin | queen |
Prancing stag | 踊鹿 | yōroku | square mover |
*Square mover | 方行 | hōgyō | — |
Violent bear | 猛熊 | mōyū | G |
Side mover | 横行 | ōgyō | G |
Vertical mover | 竪行 | shugyō | G |
Reverse chariot | 反車 | hensha | G |
Phoenix | 鳳凰 | hōō | golden bird |
Kirin | 麒麟 | kirin | great dragon |
Poisonous snake | 毒蛇 | dokuja | hook mover |
Northern barbarian | 北狄 | hokuteki | fragrant elephant ** |
*Fragrant elephant | 香象 | kōzō | — ** |
Southern barbarian | 南蛮 | nanban | white elephant ** |
Eastern barbarian | 東夷 | tōi | lion |
Western barbarian | 西戎 | seijū | lion dog |
Blind bear | 盲熊 | mōyū | 奔熊 honyū Free bear |
Drunken elephant | 醉象 | suizō | prince |
Neighboring king | 近王 | kinnō | standard bearer |
Blind tiger | 盲虎 | mōko | 奔虎 honko Free tiger ※ |
Blind monkey | 盲猿 | mōen | G ‡ |
Ferocious leopard | 猛豹 | mōhyō | 奔豹 honpyō Free leopard ※ |
Reclining dragon | 臥龍 | garyū | 奔龍 honryū Free dragon ※ |
Chinese cock | 淮鶏 | waikei | wizard stork |
*Wizard stork | *仙鶴 | senkaku | — |
Old monkey | 古猿 | koen | mountain witch‡ |
*Mountain witch | 山母 | sambo | — |
Evil wolf | 悪狼 | akurō | 奔狼 honrō Free wolf ※ |
Angry boar | 嗔猪 | shincho | 奔猪 honcho Free boar |
Cat sword | 猫刄 | myōjin | 奔猫 honmyō Free cat ※ |
Coiled serpent | 蟠蛇 | banja | 奔蛇 honja Free snake ※ |
Deva | 提婆 | daiba | teaching king |
*Teaching king | 教王 | kyōō | — |
Dark spirit | 無明 | mumyō | Buddhist spirit |
*Buddhist spirit | 法性 | hōsei | — |
Right general | 右将 | ushō | G |
Left general | 左将 | sashō | G |
Gold general | 金将 | kinshō | 奔金 honkin Free gold ※ |
Silver general | 銀将 | ginshō | 奔銀 hongin Free silver ※ |
Copper general | 銅将 | dōshō | 奔銅 hondō Free copper ※ |
Tile general | 瓦将 | gashō | 奔瓦 honga Free tile ※ |
Iron general | 鉄将 | tesshō | 奔鉄 hontetsu Free iron ※ |
Wood general | 木将 | mokushō | G |
Stone general | 石将 | sekishō | 奔石 honseki Free stone ※ |
Earth general | 土将 | doshō | 奔土 hondo Free earth ※ |
Go-between | 仲人 | chūnin | 奔人 honnin Free go-between ※ |
Knight | 桂馬 | keima | G |
Howling dog | *?犬 | kiken | G |
Donkey | 驢馬 | roba | G |
Ram's-head soldier | 羊兵 | yōhei | G |
Lance | 香車 | kyōsha | G |
Pawn | 歩兵 | fuhyō | G |
Setup
Below is a diagram showing the setup of one player's pieces. The way one player sees their own pieces is the same way the opposing player will see their pieces.GB | GB | |||||||||||||||||||||||
P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P | P |
HD | FH | EN | DO | FO | SM | VM | VB | SB | PR | AB | EW | LD | EW | AB | PR | SB | VB | VM | SM | FO | DO | EN | FH | HD |
LC | BD | WO | EA | SG | T | I | C | OR | CO | RD | CA | DE | HM | RD | CO | OR | C | I | T | SG | EA | WO | VS | RC |
SO | WB | FL | WS | EB | CC | HF | OM | OK | PC | GD | KR | LN | PH | GO | PC | RB | OM | HF | CC | SU | NB | FL | WB | SO |
SC | WH | RS | VO | CS | BB | SV | GL | BM | BT | BU | WR | NK | GG | SD | BT | BM | GL | SV | BB | CS | VO | RS | WH | SC |
RV | SI | SE | N | PS | FT | B | FE | WE | FR | S | LG | CP | RG | S | FR | WE | FE | B | FT | PS | N | SE | SI | RV |
L | TS | W | FD | LO | D | R | DH | DK | Q | G | DV | E | DS | G | Q | DK | DH | R | D | LO | FD | W | WT | L |
AB - Angry Boar | B - Bishop | BB - Blind Bear | BD - Blue Dragon |
BU - Buddhist Devil | BM - Blind Monkey | BT - Blind Tiger | C - Copp. General |
CA - Capricorn | CC - Chinese Cock | CO - Coiled Serpent | CP - Prince |
CS - Cat Sword | D - Dove | DE - Drunken Elephant | DH - Dragon Horse |
DK - Dragon King | DO - Donkey | DS - Dark Spirit | DV - Deva |
E - Emperor | EA - Earth General | EB - Eastern Barbarian | EN - Enchanted Badger |
EW - Evil Wolf | FD - Flying Dragon | FE - Fierce Eagle | FH - Flying Horse |
FL - Fer. Leopard | FO - Flying Ox | FR - Free Demon | FT - Free Dream-Eater |
G - Gold General | GB - Go Between | GD - Great Dragon | GG - Guardian of the Gods |
GL - Golden Deer | GO - Golden Bird | HD - Howling Dog | HF - Horned Falcon |
HM - Hook Mover | I - Iron General | KR - Kirin | L - Lance |
LC - Left Chariot | LD - Lion Dog | LG - Left General | LN - Lion |
LO - Long-nosed Goblin | N - Knight | NB - Northern Barbarian | NK - Neighbor King |
OK - Old Kite | OM - Old Monkey | OR - Old Rat | P - Pawn |
PC - Peacock | PH - Phoenix | PR - Prancing Stag | PS - Poison Snake |
Q - Queen | R - Rook | RB - Rushing Bird | RC - Right Chariot |
RD - Reclining Dragon | RG - Right General | RS - Ram's-head Soldier | RV - Reverse Chariot |
S - Silver General | SB - Standard Bearer | SC - Side Chariot | SD - She-devil |
SE - Soaring Eagle | SG - Stone General | SI - Side Dragon | SM - Side Mover |
SO - Soldier | SU - Southern Barbarian | SV - Silver Hare | T - Tile General |
TS - Turtle-snake | VB - Violent Bear | VM - Vert. Mover | VO - Violent Ox |
VS - Vermillion Sparrow | W - Whale | WB - Water Buffalo | WE - White Elephant |
WH - White Horse | WO - Wood General | WR - Wrestler | WS - Western Barbarian |
WT - White Tiger |
Game play
The players alternate making a move, with Black moving first. A move consists of moving a single piece on the board and potentially promoting that piece or displacing an opposing piece. Each of these options is detailed below.Movement and capture
When the same piece occurs in tai shogi and maka dai dai shogi, it moves and promotes the same way in both.An opposing piece is captured by displacement: That is, if a piece moves to a square occupied by an opposing piece, the opposing piece is displaced and removed from the board. A piece cannot move to a square occupied by a friendly piece.
Each piece on the game moves in a characteristic pattern. Pieces move either orthogonally, or diagonally. The emperor, lion, and knight are exceptions at the beginning of the game, in that they do not move, or are not required to move, in a straight line.
If a piece that cannot retreat or move aside advances across the board until it can no longer move, it must remain there until captured. This applies to the pawn, lance, ram's-head soldier, stone general, wood general, and iron general upon reaching the farthest rank, and to the knight upon reaching either of the two farthest ranks.
Many pieces are capable of several kinds of movement, with the type of movement most often depending on the direction in which they move. The movement categories are:
Step movers
Some pieces move only one square at a time.The step movers are the prince, drunk elephant, neighbor king, blind tiger, blind monkey, ferocious leopard, reclining dragon, Chinese cock, old monkey, evil wolf, the generals, angry boar, cat sword, coiled serpent, deva, dark spirit, go between, and the 25 pawns on each side.
Limited ranging pieces
Some pieces can move along a limited number of free squares along a straight line in certain directions. Other than the limited distance, they move like ranging pieces.These pieces are the water buffalo, standard bearer, vermillion sparrow, turtle-snake, blue dragon, white tiger, dove, she-devil, golden bird, great dragon, white elephant, lion dog, wrestler, Guardian of the Gods, Buddhist devil, golden deer, silver hare, fierce eagle, old kite, violent ox, flying dragon, old rat, enchanted badger, flying horse, prancing stag, violent bear, the barbarians, and the wood general.
Jumping pieces
Several pieces can jump, that is, they can pass over any intervening piece, whether friend or foe, with no effect on either. These are the lion, kirin, phoenix, poison snake, donkey, and knight.Ranging pieces
Many pieces can move any number of empty squares along a straight line, limited only by the edge of the board. If an opposing piece intervenes, it may be captured by moving to that square and removing it from the board. A ranging piece must stop where it captures, and cannot bypass a piece that is in its way. If a friendly piece intervenes, the moving piece is limited to a distance that stops short of the intervening piece; if the friendly piece is adjacent, it cannot move in that direction at all.The ranging pieces are the soaring eagle, horned falcon, queen, rushing bird, the demons, free dream-eater, water buffalo, flying ox, soldier, dragon king, dragon horse, the chariots, rook, bishop, white horse, whale, standard bearer, vermillion sparrow, turtle-snake, blue dragon, white tiger, side dragon, golden bird, great dragon, white elephant, golden deer, movers, howling dog, ram's-head solder and lance.
Hook moves (changing tack)
The hook mover, long-nosed goblin, Capricorn, and peacock can move any number of squares along a straight line, as a normal ranging piece, but may also abruptly change tack left or right by 90° at any one place along the route, and then continue as a ranging piece. Turning a corner like this is optional.The range covered by a hook move is the equivalent of two moves by a rook, or two moves by a bishop, depending the piece. However, a hook move is functionally a single move: The piece cannot capture twice in one move, nor may it capture and then move on. It must stop before an intervening piece, and must stop when it captures, just like any other ranging piece. It can only change direction once per move.
Lion moves (multiple captures)
The lion, lion dog, soaring eagle, and horned falcon have sequential multiple-capture abilities, called "lion moves". Among the pieces that only appear with promotion, so do the teaching king, buddhist spirit, and furious fiend. The details of these powerful moves are described for the lion, below.Individual pieces
When a piece occurs in both tai shogi and maka dai dai shogi, it moves and promotes the same way. Betza's funny notation has been included in brackets for easier reference, with the extension that the notation xxxayyyK stands for an xxxK move followed by an yyyK move, not necessarily in the same direction. Larger numbers of 'legs' can be indicated by repeated application of 'a'. Directional modifiers on continuation legs must be interpreted relative to the previous leg, where 'f' means 'continue in the same direction'; default is 'all directions'. The default modality of the final leg is the usual 'mc', but on non-final legs also includes a hop over an obstacle at their end-point, provided the path does not bend back onto itself there. Other modalities must be written explicitly. U denotes the universal leaper, a piece which can jump to any square on the board except the one that it is on.Emperor 天王 tennō
- Ranging jump: The emperor can jump to any empty square anywhere on the board.
- *However, it can capture a piece only if that piece is unprotected.
∞ | ∞ | ∞ |
∞ | 天 | ∞ |
∞ | ∞ | ∞ |
Prince 太子 taishi
- Step: The prince can step one square in any direction, orthogonal or diagonal.
- Hook move: The hook mover can move any number of free squares along one of the four orthogonal directions, then turn 90° and move any number of free squares in a perpendicular orthogonal direction.
- Hook move: The tengu can move any number of free squares along one of the four diagonal directions, then turn 90° and move any number of free squares in a perpendicular diagonal direction; or,
- Step: It can step one square in one of the four orthogonal directions.
- Hook move: The Capricorn can move any number of free squares along one of the four diagonal directions, then turn 90° and move any number of free squares along a perpendicular diagonal direction.
- Hook move: The peacock can move any number of free squares along one of the two forward diagonals, then turn 90° and move any number of free squares in a perpendicular diagonal direction; or,
- Limited range: It can move one or two squares in one of the two rearward diagonals.
- Range: The soaring eagle can move any number of free squares in a straight line in any direction except the forward diagonals; or,
- Lion move: It can move or jump one or two squares along either forward diagonal, potentially capturing two pieces. This power includes igui and skipping a turn, but not moving off the diagonal.
- Range: The horned falcon can move any number of free squares in a straight line in any direction except directly forwards; or,
- Lion move: It can move or jump one or two squares along a line directly forward, potentially capturing two pieces. This power includes igui and skipping a turn, but not moving off the orthogonal.
- Range: The queen can move any number of free squares along any one of the eight orthogonal or diagonal directions.
- Range: The rushing bird can move any number of free squares in any direction, orthogonal or diagonal, except directly backwards.
- Range: The free demon can move any number of free squares in the two forward diagonal directions; or,
- * It can move any number of free squares orthogonally sideways; or,
- Limited range: It can move one to five squares directly forward or backward.
- Range: The free dream-eater can move any number of free squares in the two forward diagonal directions; or,
- * It can move any number of free squares directly forward or backward; or,
- Limited range: It can move one to five squares orthogonally sideways.
- Range: The water buffalo can move any number of free squares in the four diagonal directions; or,
- * It can move any number of free squares orthogonally sideways; or,
- Limited range: It can move one or two squares directly forward or backward.
- Range: The flying ox can move any number of free squares along one of the four diagonal directions; or,
- * It can move any number of free squares orthogonally forward or backward.
- Range: The soldier can move any number of free squares along any of the four orthogonals; or,
- * It can move any number of free squares along a rear diagonal.
- Range: The dragon king can move any number of free squares along any of the four orthogonal directions; or,
- Step: It can move one square in any diagonal direction.
- Range: The dragon horse can move any number of free squares along any of the four diagonal directions; or,
- Step: It can move one square in any orthogonal direction.
- Range: The side chariot can move any number of free squares along one of the four orthogonal directions; or,
- Step: It can move one square diagonally behind.
- Range: The rook can move any number of free squares along any of the four orthogonal directions.
- Range: The bishop can move any number of free squares along any of the four diagonal directions.
- Area move/double capture: The lion can step one square in any direction up to twice in a turn. It can change directions after its first step, and is not restricted to following one of the eight orthogonal or diagonal directions. That is, it can also step to one of the in-between squares that a knight jumps to in Western chess.
- *Unlike the hook movers, it can continue after a capture on the first step, potentially capturing two pieces on each turn.
- *By moving back to its starting square, it can effectively capture a piece on an adjacent square without moving. This is called 居喰い igui "stationary feeding".
- *A similar move without capturing leaves the board unchanged, which is a way to pass a turn. This can only be done when there are empty adjacent squares.
- Jump: The lion can jump anywhere within two squares. This is equivalent to jumping in any of the eight diagonal or orthogonal directions, or making any of the jumps of a knight in Western chess.
- Range: The white horse can move any number of free squares directly forward or backward; or,
- * It can move any number of free squares diagonally forward.
- Range: The whale can move any number of free squares directly forward or backward; or;
- * It can move any number of free squares diagonally backward.
- Range: The standard bearer can move any number of free squares along any of the forward directions ; or,
- Limited range: It can move one or two squares along any of the other directions.
There are two completely different claims for the movement of the sparrow.
- Japanese Wikipedia:
- *Range: The vermillion sparrow can move any number of free squares along the forward right or rear left diagonals; or,
- *Step: It can step one square orthogonally or on the rear right diagonal. It has no move along the fore left diagonal.
- English-language sources:
- *Range: The vermillion sparrow can move any number of free squares diagonally or orthogonally forward; or,
- *Limited range: It can move one or two squares diagonally backward; or,
- *Step: It can move one square directly backward.
There are two different movement options claimed for the turtle-snake:
- English-language sources:
- *Range: It can move any number of free squares diagonally forward or directly backward; or,
- *Limited range: It can move one or two squares diagonally backward; or,
- *Step: It can step one square directly backward.
- Japanese Wikipedia:
- *Range: The turtle-snake can move any number of free squares diagonally forward to the right or diagonally backward to the left; or,
- *Step: It can step one square in any direction.
- Range: The blue dragon can move any number of free squares along the side orthogonals or the forward right diagonal; or,
- Limited range: It can move one or two squares directly forward or backward; or,
- Step: It can move one square diagonally forward to the left.
- Range: The white tiger can move any number of free squares directly forward or backward; or,
- * diagonally forward to the left; or,
- Step: It can move one or two squares orthogonally sideways; or,
- * It can step one square diagonally forward to the right.
- Range: The right chariot can move any number of free squares straight forward; or,
- * It can move any number of free squares along the forward right or rear left diagonals; or,
- Step: It can move one square directly backward.
- Range: The left chariot can move any number of free squares straight forward; or,
- * It can move any number of free squares along the forward left or rear right diagonals; or,
- Step: It can move one square directly backward.
- Range: The side dragon can move any number of free squares orthogonally forward or sideways; or,
- Step: It can move one square directly backward.
- Limited range: The dove can move one or two squares in one of the four orthogonal directions; or'
- * It can move one to five squares in one of the four diagonal directions.
- Limited range: The she-devil can move one or two squares along one of the four diagonal directions; or,
- * It can move one to five squares along one of the four orthogonal directions.
- Range: The golden bird can move any number of free squares directly forward or backward; or,
- 1st limited range: It can move one or two squares sideways; or,
- 2nd limited range: It can move one to three squares along one of the four diagonals.
There are two descriptions of the move of this piece. The main Japanese Wikipedia entry gives it as,
- Range: The great dragon can move any number of free squares orthogonally sideways; or,
- Jump: It can jump to the second or third square orthogonally sideways; or,
- 1st limited range: It can move one or two squares directly forward or backward; or,
- 2nd limited range: It can move one to three squares along either of the rear diagonals.
○ | ||||||||
○ | ||||||||
─ | ☆ | ☆ | ─ | 大 | ─ | ☆ | ☆ | ─ |
○ | ○ | ○ | ||||||
○ | ○ | ○ | ||||||
○ | ○ | |||||||
However, a second description is found in the kirin article, as the kirin promotes to great dragon. In that description, the piece moves as described in dai dai shogi: no jumps to the side, and three steps in any of the four diagonals.
White elephant 白象 hakuzō
- Range: The white elephant can move any number of free squares diagonally backward; or,
- Limited range: It can move one or two square in one of the other six diagonal or orthogonal directions.
- Lion move/triple capture: The lion dog can make a three-step lion move along any one of the eight orthogonal or diagonal directions. That is, unlike the lion itself, but like the soaring eagle and horned falcon, it is restricted to moving along a straight line and cannot move to the in-between squares. This power includes jumping, igui, and skipping a turn.
- *A piece may be captured on all three steps.
- *The lion dog may capture a piece on the first and second square, and then retreat to the first square. Or it may snatch a piece off the first square as in normal igui.
- *It may jump to the second square, and then continue to the third square, capturing up to two pieces. Or it may jump directly to the third square.
- *It is not required to take all three steps. However, like most powerful pieces, once it makes a capturing move it "promotes" and loses its powers.
- Limited range: The wrestler can move one to three squares along one of the four diagonal directions; or,
- Step: It can move one square orthogonally sideways.
- Limited range: The guardian of the gods can move one to three squares along one of the four orthogonal directions; or
- Step: It can step one square diagonally .
- Limited range: The Buddhist devil can move one to three squares diagonally forward; or,
- Step: It can move one square orthogonally sideways or directly backward.
- Range: The golden deer can move any number of free squares diagonally forward; or,
- Limited range: It can move one or two squares diagonally backward.
- Range: The silver hare can move any number of free squares diagonally backward; or,
- Limited range: It can move one or two squares diagonally forward.
- Limited range: The fierce eagle can move one or two squares orthogonally to either side or diagonally backwards; or,
- Step: It may step one square in any of the three forward directions.
- Limited range: The old kite can move one or two squares along one of the four orthogonal directions; or,
- Step: It can move one square diagonally forward.
- Limited range: The violent ox can move one or two squares in one of the four orthogonal directions.
- Step: The flying dragon can move one or two squares along one of the four diagonal directions.
- Limited range: The old rat can move one or two squares along a forward diagonal or the rear orthogonal.
- Limited range: The enchanted badger can move one or two squares orthogonally forward or sideways.
- Limited range: The flying horse can move one or two squares diagonally forward; or,
- Step: It can step one square in one of the four orthogonal directions.
- Limited range: The prancing stag can move one or two squares orthogonally sideways; or,
- Step: It can step one square in one of the four diagonal directions, or directly forward.
- Limited range: The violent bear can move one or two squares diagonally forward; or,
- Step: It can step one square orthogonally sideways.
- Range: The side mover can move any number of free squares orthogonally sideways; or,
- Step: It can move one square orthogonally forward or backward.
- Range: The vertical mover can move any number of free squares orthogonally forward or backward; or,
- Step: It can step one square orthogonally sideways.
- Step: The phoenix can step one square in one of the four orthogonal directions; or,
- Jump: It can jump to the second square in one of the four diagonal directions.
- Step: The kirin can step one square in one of the four diagonal directions; or,
- Jump: It can jump to the second square in one of the four orthogonal directions.
- Ranging: The reverse chariot can move any number of free squares directly forward or backward.
There are two different movement options claimed for the poison snake:
- English sources: The poisonous snake can jump to the second square directly forward or diagonally backward; or it can step one square to either side ;
- Japanese Wikipedia: The poisonous snake can step one or two squares directly forward or to either side; or it can step one square diagonally forward or directly backward.
Northern barbarian 北狄 hokuteki
- Limited range: The northern barbarian can move one or two squares diagonally forward; or,
- Step: It can step one square orthogonally sideways or diagonally backward.
- Limited range: The southern barbarian can move one or two squares diagonally backward; or,
- Step: It can step one square orthogonally sideways or diagonally forward.
- English-language sources:
- *Limited range: The eastern barbarian can move one or two squares directly forward or backward; or,
- *Step: It can step one square orthogonally sideways or diagonally forward.
- Japanese Wikipedia:
- *Limited range: The eastern barbarian can move one or two squares directly forward or backward; or,
- *Step: It can step one square to the right.
- Limited range: The western barbarian can move one or two squares orthogonally sideways; or,
- Step: It can step one square directly forward or backward, or diagonally forward.
- Range: The blind bear can move any number of free squares orthogonally backward; or,
- Step: It can step one square in one of the four diagonal directions.
- Step: The drunken elephant can step one square in any direction, orthogonal or diagonal, except directly backward.
- Step: The neighbor king can step one square in any direction, orthogonal or diagonal .
- Step: The blind tiger can step one square in any direction except orthogonally forward.
- Range: The free tiger moves in the same directions as a blind tiger, but with unlimited range.
- Step: The blind monkey can step one square in one of the four diagonal directions or either orthogonal sideways.
- Step: The leopard can move one square in the four diagonal directions; or,
- * It can move one square orthogonally forward or backward.
- Range: The free leopard moves in the same directions as a ferocious leopard, but with unlimited range.
- Step: The reclining dragon can step one square in one of the four orthogonal directions or diagonally backward.
- Range: The free dragon moves in the same directions as a reclining dragon, but with unlimited range.
- Step: The Chinese cock can step one square orthogonally sideways, directly backward, or diagonally forward.
- Step: The old monkey can step one square in one of the four diagonal directions, or directly backward.
- Step: The evil wolf can step one square orthogonally sideways or forward, or diagonally forward.
- Range: The free wolf moves in the same directions as an evil wolf, but with unlimited range.
- Step: The angry boar can step one square in one of the four orthogonal directions.
- Step: The cat sword can move one square in one of the four diagonal directions.
- Range: The free cat moves in the same directions as a cat sword, but with unlimited range.
- Step: The coiled serpent can step one square directly forward or backward, or diagonally backward.
- Range: The free serpent moves in the same directions as a coiled serpent, but with unlimited range.
The dark spirit has asymmetric options for movement.
- Step: It can step one square diagonally forward, in either direction; or,
- * One square orthogonally to the right; or,
- * One square diagonally backward to the left.
The deva has asymmetric options for movement.
- Step: It can step one square diagonally forward, in either direction; or,
- * One square orthogonally to the left; or,
- * One square diagonally backward to the right.
- Step: The right general can step one square in any direction except orthogonally right. It is called the right general because it guards the right side of the board.
- Step: The left general can move one square in any direction except orthogonally left. It is called the left general because it guards the left side of the board.
- Step: The gold general can step one square in one of the four orthogonal directions; or,
- * One square diagonally forward, giving it six possibilities.
- Range: The free gold moves in the same directions as a gold general, but with unlimited range.
- Step: The silver general can step one square in one of the four diagonal directions; or,
- * One square straight forward, giving it five possibilities.
- Ranging: The free silver moves in the same directions as a silver general, but with unlimited range.
- Step: The copper general can step one square directly forward or backward, or one square diagonally forward, giving it four possibilities.
- Range: The free copper moves in the same directions as a copper general, but with unlimited range.
- Step: The tile general can step one square diagonally forward or directly backward, giving it three possibilities.
- Range: The free tile moves in the same directions as a tile general, but with unlimited range.
- Step: The iron general can move one square forward, orthogonally or diagonally, giving it three possibilities.
- Range: The free iron moves in the same directions as an iron general, but with unlimited range.
- Limited range: The wood general can move one or two squares along a forward diagonal.
- Step: The stone general can step one square diagonally forward, giving it two possibilities.
- Range: The free stone moves in the same directions as a stone general, but with unlimited range.
- Step: The earth general and go between can move one square directly forward or backward.
- Range: The free earth and free goer move in the same directions as the earth general and go-between, but with unlimited range.
- Jump: The knight jumps at an angle intermediate between orthogonal and diagonal, amounting to one square forward plus one square diagonally forward, in a single motion, ignoring any intervening piece. That is, it has a choice of two forward destinations.
- Range: The howling dog can move any number of free squares along the forward orthogonal; or,
- Step: It can step one square directly backwards.
- Step: The donkey can step one square orthogonally; or,
- Jump: It can jump to the second square directly forward or backward.
- Range: The ram's-head soldier can move any number of free squares along either forward diagonal.
- Range: The lance can move any number of free squares straight forward.
- Step: The pawn can step one square forward.
Promotion
This means that a player only gets to attack or defend with many of the original lion and hook movers once each before they lose their powers. To permanently gain such ability, certain weaker pieces must be promoted.
This is all very different from smaller shogi variants, where pieces promote when they cross a promotion zone, and where promotion is optional and usually a good thing. The dots on the tai shogi board that would represent promotion zones in other games are only there as placement guides for the initial setup of the two camps.
Some pieces promote, or demote, to a piece that exists in the initial setup of the board. However, such a piece cannot then promote a second time as its namesake does. For example, a gold general promotes to a free gold. However, while a hook mover demotes to a gold general on its first capturing move, it does not promote to a free gold on its second. Rather, it remains a gold general for the rest of the game. This should be clear from the game equipment, for each piece only has two sides.
Many of the step movers promote to free-ranging pieces but retain their directions of movement. These were listed above after the unpromoted pieces. Other pieces only appear as a result of promotion. They are as follows:
Pieces that only appear with promotion
These are in addition to the 'free' pieces mentioned in the previous section.Teaching king 教王 kyōō
- Lion move: The teaching king can move as a lion dog ; or,
- Range: It can move as a queen.
- Lion move: The Buddhist spirit can move either as a lion; or,
- Range: It can move as a queen.
- Lion move: The furious fiend can move as a lion anywhere within a two-square distance, including jumps, double capture, igui, and passing a turn; or,
- Limited range: It can move up to three free squares along one of the eight diagonals and orthogonals. HOWEVER - sources describe this piece as 'lion plus lion dog' - therefore some players do just this - a similar situation to the teaching king 'queen plus lion dog', both sets of move being available - a matter of choice.
- Range: The wizard stork can move any number of free squares along one of the four diagonal directions, or directly forward; or,
- Step: It can step one square directly backward.
- Range: The mountain witch can move any number of free squares along one of the four diagonal directions, or directly backward; or,
- Step: It can step one square directly forward.
- Range: The square mover can move any number of free squares along one of the four orthogonal directions; or,
- Step: It can step one square diagonally forward.
- Range: The fragrant elephant can move any number of free squares diagonally forward; or,
- Limited range: It can move one or two squares along one of the four orthogonal directions, or along either rear diagonal.
- Limited range 1: The great elephant can move one to five squares orthogonally sideways or along either rear diagonal; or,
- Limited range 2: It can move one to three squares diagonally forward, or directly forward or backward. HOWEVER some players keep the lion power on promotion so the extra 2 steps in the sideways and diagonally backwards directions are just 2 extra steps with no lion power. If the great elephant steps five steps then lion power can not be used - once again a choice of moves is offered.
- Range: The free bear can move any number of free squares along one of the four diagonal directions, or along either orthogonal sideways; or,
- Jump: It can perform a knight's jump forward.
- Range: The free boar can move any number of free squares along one of the four diagonal directions, or along either orthogonal sideways.
- Range: The bat can move any number of free squares along either of the rear diagonals, or directly forward.
Check and mate
Unlike Western chess, a player need not move out of check, and indeed may even move into check. Although obviously not often a good idea, a player with more than one royal may occasionally sacrifice one of these pieces as part of a gambit.
A player is not allowed to give perpetual check to the sole objective piece.
Game end
A player who captures the opponent's sole remaining emperor or prince wins the game. In practice this rarely happens, as a player will resign when checkmated, as otherwise when loss is inevitable.A player who makes an illegal move loses immediately.
Another possible, if rather uncommon, way for a game to end is repetition. If the same position occurs four times with the same player to play, then the game is no contest. Recall, however, the prohibition against perpetual check.
Game notation
The method used in English-language texts to express shogi moves was established by George Hodges in 1976. It is derived from the algebraic notation used for chess, but differs in several respects. Modifications have been made for tai shogi.A typical example is P-8h.
The first letter represents the piece moved.
Promoted pieces have a + added in front of the letter.. The designation of the piece is followed by a symbol indicating the type of move: - for an ordinary move or x for a capture. Next is the designation for the square on which the piece lands. This consists of a number representing the file and a lowercase letter representing the rank, with 1a being the top right corner and 25y being the bottom left corner.
If a soaring eagle, horned falcon, lion or Buddhist spirit captures by 'igui’, the square of the piece being captured is used instead of the destination square, and this is preceded by the symbol '!'. If a double capture is made, then it is added after the first capture.
If a capture mandates the player to promote the piece, then a + is added to the end to signify that the promotion was taken. For example, ORx7c+ indicates an old rat capturing on 7c and promoting.
In cases where the above notation would be ambiguous, the designation of the start square is added after the designation for the piece in order to make clear which piece is meant.
Moves are commonly numbered as in chess.
Strategy
Piece values
According to the German Chu Shogi Association, the average values of the pieces are :Piece name | Approximate value | Promotion | Approximate value |
Emperor | — | — | |
Prince | Emperor | ||
Drunk Elephant | Prince | ||
Long-Nosed Goblin | 89 | — | — |
Peacock | 66 | — | — |
Hook Mover | Gold General | ||
Capricorn | 88 | Gold General | |
Lion | 22 | Furious Fiend | 24 |
Queen | 21 | — | — |
Rushing Bird | 20 | Free Demon | 18 |
Free Dream-Eater | 19 | — | — |
Horned Falcon | 18 | — | — |
Free Demon | 18 | — | — |
Water Buffalo | 17 | Free Dream-Eater | 19 |
Soaring Eagle | 17 | — | — |
Flying Ox | 16 | — | — |
Standard Bearer | 15 | — | — |
Soldier | 14 | — | — |
Vermillion Sparrow | 13 | — | — |
White Horse | 13 | — | — |
Golden Bird | 12 | — | — |
White Tiger | 11 | — | — |
Blue Dragon | 11 | — | — |
Great Dragon | 11 | — | — |
Turtle Snake | 10 | — | — |
Left Chariot | 10 | — | — |
Right Chariot | 10 | — | — |
Dove | — | — | |
Whale | — | — | |
Lion Dog | Great Elephant | ||
White Elephant | — | — | |
Dragon King | 13 | — | — |
Dragon Horse | 12 | — | — |
Side Chariot | 12 | — | — |
Golden Deer | — | — | |
Ram's-Head Soldier | — | — | |
Silver Hare | — | — | |
She-Devil | Gold General | ||
Guardian of the Gods | Gold General | ||
Wrestler | Gold General | ||
Buddhist Devil | Gold General | ||
Rook | 11 | Gold General | |
Bishop | 10 | Gold General | |
Side Dragon | 10 | Gold General | |
Vertical Mover | Gold General | ||
Side Mover | Gold General | ||
Reverse Chariot | Gold General | ||
Howling Dog | Gold General | ||
Lance | Gold General | ||
Old Kite | Long-Nosed Goblin | 89 | |
Poisonous Snake | Hook Mover | ||
Eastern Barbarian | Lion | 22 | |
Dark Spirit | Buddhist Spirit | 35 | |
Deva | Teaching King | 29 | |
Flying Horse | Queen | 21 | |
Neighbouring King | Standard-Bearer | 15 | |
Old Rat | Bat | 15 | |
Chinese Cock | Wizard Stork | 15 | |
Northern Barbarian | Fragrant Elephant | 12 | |
Phoenix | Golden Bird | 12 | |
Blind Monkey | Mountain Witch | 12 | |
Kirin | Great Dragon | 11 | |
Western Barbarian | Lion Dog | ||
Southern Barbarian | White Elephant | ||
Enchanted Badger | Dove | ||
Prancing Stag | Square Mover | 12 | |
Flying Dragon | Gold General | ||
Donkey | Gold General | ||
Knight | Gold General | ||
Fierce Eagle | — | — | |
Blind Bear | — | — | |
Left General | — | — | |
Right General | — | — | |
Blind Tiger | — | — | |
Violent Ox | — | — | |
Gold General | — | — | |
Ferocious Leopard | — | — | |
Violent Bear | — | — | |
Evil Wolf | — | — | |
Reclining Dragon | — | — | |
Silver General | — | — | |
Old Monkey | — | — | |
Copper General | — | — | |
Wood General | — | — | |
Iron General | — | — | |
Cat Sword | — | — | |
Coiled Serpent | — | — | |
Angry Boar | — | — | |
Tile General | — | — | |
Stone General | — | — | |
Earth General | — | — | |
Go-Between | — | — | |
Pawn | — | — |
These average values do not take into account the special status of the prince as a royal piece, or emperor as disposable if there's a prince and other piece. They have also been normalized so that the pawn is worth 1 point to avoid fractions. Additionally, pieces change value if they have a good chance of promotion. This is particularly significant for the hook mover and capricorn, which are two of the most powerful pieces in the game, but "promote" to the weak gold general; and the old kite and poisonous snake, which promote respectively to the hook mover and long-nosed goblin.