Taikyoku shogi

Taikyoku shōgi (大局将棋 'ultimate chess') is the largest known variant of shogi (Japanese chess). The game was created around the mid 16th century (presumably by priests) and is based on earlier large board shogi games. Before the rediscovery of taikyoku shogi in 1997, tai shogi was believed to be the largest playable chess variant ever. It has not been shown that taikyoku shogi was ever widely played. There are only two sets of restored taikyoku shogi pieces and one of them is held at Osaka University of Commerce.[1] One game may be played over several long sessions and require each player to make over a thousand moves.

Because the game was found only recently after centuries of obscurity, it is difficult to say exactly what all the rules were. Several documents describing the game have been found; however, there are differences between them. Many of the pieces appear in other shogi variants but their moves may be different. The board, and likewise the pieces, were made much smaller, making archeological finds difficult to decipher. Research into this game continues for historical and cultural reasons, but also to satisfy the curious and those who wish to play what could be the most challenging chess-like game ever made. More research must be done however. This article focuses on one likely set of rules that can make the game playable in modern times but is by no means canon. These rules may change as more discoveries are made and secrets of the game unlocked.

Rules of the game

Taikyoku shogi is very different from other large-board shogi variants: tenjiku shogi, dai dai shogi, maka dai dai shogi, and tai shogi. The most notable differences lie with the piece movements and their promotions.

Objective

The objective of the game is to capture the opponent's king(s) and crown prince(s). 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. Unlike standard shogi, pieces may not be dropped back into play after being captured.

Game equipment

Two players, Black and White (or 先手 sente and 後手 gote), play on a board ruled into a grid of 36 ranks (rows) by 36 files (columns) with a total of 1,296 squares. The squares are differentiated by marking or color.

Each player has a set of 402 wedge-shaped pieces of 209 types. The players must remember 253 sets of moves. The pieces are of slightly different sizes with the larger pieces near the king and becoming progressively smaller for pieces further from the king, regardless of power. In general, the stronger pieces are nearer to the king.

Several of the English names were chosen to correspond to rough equivalents in Western chess, rather than as translations of the Japanese names.

Each piece has its name in the form of two or three kanji written on its face. On the reverse side of some pieces are two or three other characters, often in a different color (commonly 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; starting with the first row.

Piece Kanji Rōmaji Promotes to
King 玉将 gyokushō
Crown prince 太子 taishi king
Gold general 金将 kinshō rook
Right general 右将 ushō right army
*Right army 右軍 ugun
Left general 左将 sashō left army
*Left army 左軍 sagun
Rear standard 後旗 kōki center standard
Free king 奔王 honnō great general
Free dream-eater 奔獏 honbaku free king
Wooden dove 鳩槃 kyūhan
Ceramic dove 鳩盤 kyūban
Earth dragon 地龍 chiryū rain dragon
Free demon 奔鬼 honki free king
Running horse 走馬 sōma, sōba free demon
Beast cadet 獣曹 jūsō beast officer
Long-nosed goblin 天狗 tengu
Mountain eagle (left and right) 山鷲 sanshū soaring eagle
Fire demon 火鬼 kaki free fire
*Free fire 奔火 honka
Whale 鯨鯢 keigei great whale
*Great whale 大鯨 daigei
Running rabbit 走兎 sōto treacherous fox
White tiger 白虎 byakko divine tiger
*Divine tiger 神虎 shinko
Turtle-snake 玄武 genbu divine turtle
*Divine turtle 神亀 shinki
Lance 香車 kyōsha white horse
Reverse chariot 反車 hensha whale
Fragrant elephant 香象 kōzō elephant king
*Elephant king 象王 zōō
White elephant 白象 hakuzō elephant king
Mountain dove 山鳩 sankyū great dove
Flying swallow 飛燕 hien rook
Captive officer 禽吏 kinri captive bird
*Captive bird 禽鳥 kinchō
Rain dragon 雨龍 uryū great dragon
Forest demon 森鬼 shinki thunder runner
*Thunder runner 雷走 raisō
Mountain stag 山鹿 sanroku great stag
Running pup 走狗 sōku free leopard
*Free leopard 奔豹 honpyō
Running serpent 走蛇 sōja Free serpent
*Free serpent 奔蛇 honja
Side serpent 横蛇 ōja great shark
*Great shark 大鱗 dairin
Great dove 大鳩 daikyū wooden dove
Running tiger 走虎 sōko free tiger
*Free tiger 奔虎 honko
Running bear 走熊 sōyū free bear
*Free bear 奔熊 hon’yū
Yaksha 夜叉 yasha Heavenly Tetrarch
*Heavenly Tetrarch 四天 shiten
Buddhist devil 羅刹 rasetsu Heavenly Tetrarch
Guardian of the Gods 金剛 kongō Heavenly Tetrarch
Wrestler 力士 rikishi Heavenly Tetrarch
Silver general 銀将 ginshō vertical mover
Drunken elephant 酔象 suizō crown prince
Neighboring king 近王 kinnō front standard
Gold chariot 金車 kinsha playful cockatoo
*Playful cockatoo 遊母 yūmo
Side dragon 横龍 ōryū running dragon
*Running dragon 走龍 sōryū
Running stag 走鹿 sōroku free stag
*Free stag 奔鹿 honroku
Running wolf 走狼 sōrō free wolf
*Free wolf 奔狼 honrō
Bishop general 角将 kakushō rain demon
*Rain demon 霖鬼 rinki
Rook general 飛将 hishō flying crocodile
*Flying crocodile 飛鰐 higaku
Right tiger 右虎 uko white tiger
Left tiger 左虎 sako turtle-snake
Right dragon 右龍 uryū Blue dragon
Left dragon 左龍 saryū vermillion sparrow
Beast officer 獣吏 jūri beast bird
*Beast bird 獣鳥 jūchō
Wind dragon 風龍 fūryū free dragon
*Free dragon 奔龍 honryū
Free pup 奔狗 honku free dog
*Free dog 奔犬 honken
Rushing bird 行鳥 gyōchō free demon
Old kite 古鵄 kotetsu long-nosed goblin
Peacock 孔雀 kujaku long-nosed goblin
Water dragon 水龍 suiryū phoenix master
Fire dragon 火龍 karyū kirin master
Copper general 銅将 dōshō side mover
Phoenix master 鳳師 hōshi
Kirin master 麟師 rinshi
Silver chariot 銀車 ginsha goose wing
*Goose wing 鴻翼 kōyoko
Vertical bear 竪熊 shuyū free bear
Knight 桂馬 keima side soldier
Pig general 豚将 tonshō free pig
*Free pig 奔豚 honton
Chicken general 鶏将 keishō free chicken
*Free chicken 奔鶏 honkei
Pup general 狗将 kushō free pup
Horse general 馬将 bashō free horse
*Free horse 奔馬 honba
Ox general 牛将 gyūshō free ox
*Free ox 奔牛 hongyū
Center standard 中旗 chūki front standard
Side boar 横猪 ōcho free boar
*Free boar 奔猪 honcho
Silver rabbit 銀兎 ginto whale
Golden deer 金鹿 konroku white horse
Lion 獅子 shishi furious fiend
*Furious fiend 奮迅 funjin
Captive cadet 禽曹 kinsō captive officer
Great stag 大鹿 dairoku free stag
Violent dragon 猛龍 mōryū great dragon
Woodland demon 林鬼 rinki right phoenix
*Right phoenix 右鵰 ushū
Vice general 副将 fukushō great general
Great general 大将 taishō
Stone chariot 石車 sekisha walking heron
*Walking heron 歩振 fushin
Cloud eagle 雲鷲 unjū strong eagle
*Strong eagle 勁鷲 keijū
Bishop 角行 kakugyō dragon horse
Rook 飛車 hisha dragon king
Side wolf 横狼 ōrō free wolf
Flying cat 飛猫 hibyō rook
Mountain falcon 山鷹 san’ō horned falcon
Vertical tiger 竪虎 shuko free tiger
Soldier 兵士 heishi cavalier
*Cavalier 騎士 kishi
Little standard 小旗 shōki rear standard
Cloud dragon 雲龍 unryū great dragon
Copper chariot 銅車 dōsha copper elephant
*Copper elephant 銅象 dōzō
Running chariot 走車 sōsha burning chariot
*Burning chariot 炮車 hōsha
Ram’s-head soldier 羊兵 yōhei tiger soldier
*Tiger soldier 虎兵 kohei
Violent ox 猛牛 mōgyū flying ox
Great dragon 大龍 dairyū ancient dragon
*Ancient dragon 元龍 genryū, ganryū
Golden bird 金翅 kinshi free bird
*Free bird 奔翅 honshi
Dark spirit 無明 mumyō Buddhist spirit
*Buddhist spirit 法性 hōsei
Deva 提婆 daiba teaching king
*Teaching king 教王 kyōō
Wood chariot 木車 mokusha wind snapping turtle
*Wind snapping turtle 風鼈 fūbetsu
White horse 白駒 hakku great horse
*Great horse 大駒 daiku
Howling dog (left and right) 𠵇犬 kiken left dog, right dog

Piece Kanji Rōmaji Promotes to
*Right dog 右犬 uken
*Left dog 左犬 saken
Side mover 横行 ōgyō free boar
Prancing stag 踊鹿 yōroku square mover
Water buffalo 水牛 suigyū great dream-eater
*Great dream-eater 大獏 daibaku
Ferocious leopard 猛豹 mōhyō bishop
Fierce eagle 猛鷲 mōjū soaring eagle
Flying dragon 飛龍 hiryū dragon king
Poisonous snake 毒蛇 dokuja hook mover
Flying goose 鳫飛 ganhi swallow’s wings
Strutting crow 烏行 ukō flying falcon
*Flying falcon 飛鷹 hiyō
Blind dog 盲犬 mōken violent stag
Water general 水将 suishō vice general
Fire general 火将 kashō great general
Phoenix 鳳凰 hōō golden bird
Kirin 麒麟 kirin golden bird
Hook mover 鉤行 kōgyō
Little turtle 小亀 shōki treasure turtle
*Treasure turtle 宝亀 hōki
Great turtle 大亀 daiki spirit turtle
*Spirit turtle 霊亀 reiki
Capricorn 摩羯 makatsu hook mover
Tile chariot 瓦車 gasha running tile
*Running tile 走瓦 sōga
Vertical wolf 竪狼 shurō running wolf
Side ox 横牛 ōgyū flying ox
Donkey 驢馬 roba ceramic dove
Flying horse 馬麟 barin free king
Violent bear 猛熊 mōyū great bear
*Great bear 大熊 daiyū
Angry boar 嗔猪 shincho free boar
Evil wolf 悪狼 akurō venomous wolf
*Venomous wolf 毒狼 dokurō
Liberated horse 風馬 fūma heavenly horse
*Heavenly horse 天馬 temma
Flying cock 鶏飛 keihi raiding falcon
*Raiding falcon 延鷹 en’yō
Old monkey 古猿 koen mountain witch
*Mountain witch 山母 sanbo
Chinese cock 淮鶏 waikei wizard stork
*Wizard stork 仙鷦 senkaku
Northern barbarian 北狄 hokuteki wooden dove
Southern barbarian 南蛮 nanban golden bird
Western barbarian 西戎 seijū lion dog
Eastern barbarian 東夷 tōi lion
Violent stag 猛鹿 mōroku rushing boar
*Rushing boar 行猪 gyōcho
Violent wolf 猛狼 mōrō bear’s eyes
*Bear’s eyes 熊眼 yūgan
Treacherous fox 隠狐 inko, onko mountain crane
*Mountain crane 山鶻 sankotsu
Center master 中師 chūshi
Roc master 鵬師 hōshi
Earth chariot 土車 dosha young bird
*Young bird 𦬨鳥 shakuchō
Vermillion sparrow 朱雀 suzaku divine sparrow
*Divine sparrow 神雀 shinjaku
Blue dragon 青龍 seiryū divine dragon
*Divine dragon 神龍 shinryū
Enchanted badger 変狸 henri ceramic dove
Horseman 騎兵 kihei cavalier
Swooping owl 鴟行 shigyō cloud eagle
Climbing monkey 登猿 tōen violent stag
Cat sword 猫刄 myōjin dragon horse
Swallow’s wings 燕羽 en’u gliding swallow
*Gliding swallow 燕行 engyō
Blind monkey 盲猿 mōen flying stag
*Flying stag 飛鹿 hiroku
Blind tiger 盲虎 mōko flying stag
Oxcart 牛車 gissha plodding ox
*Plodding ox 歬牛 sengyū
Side flier 横飛 ōhi side dragon
Blind bear 盲熊 mōyū flying stag
Old rat 老鼠 rōso bird of paradise
*Bird of paradise jichō
Square mover 方行 hōgyō strong chariot
*Strong chariot 強車 kyōsha
Coiled serpent 蟠蛇 banja coiled dragon
*Coiled dragon 蟠龍 banryū
Reclining dragon 臥龍 garyū great dragon
Free eagle 奔鷲 honjū
Lion hawk 獅鷹 shiō
Chariot soldier 車兵 shahei Heavenly Tetrarch king
*Heavenly Tetrarch king 四天王 shitennō
Side soldier 横兵 ōhei water buffalo
Vertical soldier 竪兵 shuhei chariot soldier
Wind general 風将 fūshō violent wind
*Violent wind 暴風 bōfū
River general 川将 senshō Chinese river
*Chinese river 淮川 waisen
Mountain general 山将 sanshō peaceful mountain
*Peaceful mountain 泰山 taizan
Front standard 前旗 zenki great standard
Horse soldier 馬兵 bahei running horse
Wood general 木将 mokushō white elephant
Ox soldier 牛兵 gyūhei running ox
*Running ox 走牛 sōgyū
Earth general 土将 doshō white elephant
Boar soldier 猪兵 chohei running boar
*Running boar 走猪 sōcho
Stone general 石将 sekishō white elephant
Leopard soldier 豹兵 hyōhei running leopard
*Running leopard 走豹 sōhyō
Tile general 瓦将 gashō white elephant
Bear soldier 熊兵 yūhei strong bear
*Strong bear 強熊 kyōyū
Iron general 鉄将 tesshō white elephant
Great standard 大旗 daiki
Great master 大師 daishi
Right chariot 右車 usha right iron chariot
*Right iron chariot 右鉄車 utessha
Left chariot 左車 sasha left iron chariot
*Left iron chariot 左鉄車 satessha
Side monkey 横猿 ōen side soldier
Vertical mover 竪行 shugyō flying ox
Flying ox 飛牛 higyū fire ox
*Fire ox 火牛 kagyū
Longbow soldier 弩兵 dohei longbow general
*Longbow general 弩将 doshō
Vertical pup 竪狗 shuku leopard king
*Leopard king 豹王 hyōō
Vertical horse 竪馬 shuba dragon horse
Burning soldier 炮兵 hōhei burning general
*Burning general 炮将 hōshō
Dragon horse 龍馬 ryūme horned falcon
Dragon king 龍王 ryūō soaring eagle
Sword soldier 刀兵 tōhei sword general
*Sword general 刀将 tōshō
Horned falcon 角鷹 kakuō great falcon
*Great falcon 大鷹 daiō
Soaring eagle 飛鷲 hijū great eagle
*Great eagle 大鷲 daijū
Spear soldier 鎗兵 sōhei spear general
*Spear general 鎗将 sōshō
Vertical leopard 竪豹 shuhyō great leopard
*Great leopard 大豹 daihyō
Savage tiger 猛虎 mōko great tiger
*Great tiger 大虎 daiko
Cross-bow soldier 弓兵 kyūhei cross-bow general
*Cross-bow general 弓将 kyūshō
Roaring dog 吼犬 kōken lion dog
Lion dog 狛犬 komainu great elephant
*Great elephant 大象 taizō
Dog inu multi general
*Multi general 雜将 suishō
Go between 仲人 chūnin drunken elephant
Pawn 歩兵 fuhyō gold general

Setup

Taikyoku Shogi

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.

Board layout
                                                                       
          D         GB       D             D       GB         D          
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 P P P P P P P P P P P
LC MK VM OX LB VP VH BN DH DK SE HF EL SP VL TG SB LD DG SB TG VL SP EL HF SE DK DH BN VH VP LB OX VM MK RC
CH SL VR WN RE M SD HS GN OS EA BS SG LP T BE I GM GE I BE T LP SG BS EA OS GN HS SD M RE WN VR SL CH
EC BL EB HO OW CM CS SW BM BT OC SF BB OR SQ SN RD LI FE RD SN SQ OR BB SF OC BT BM SW CS CM OW HO EB VI EC
TC VW SX DO FH VB AB EW LH CK OM CC WS ES VS NT TF RM MT TF NT VS SU NB CC OM CK LH EW AB VB FH DO SX VW TC
WC WH HD SM PR WB FL EG FD PS FY ST BI WG F KR CA GT LL HM PH F WG BI ST FY PS FD EG FL WB PR SM HD WH WC
CI CE B R WF FC MF VT SO LS CL CR RH HE VO GD GO DV DS GO GD VO HE RH CR CL LS SO VT MF FC WF R B CE CI
SV VE N PI CG PG H O CN SA SR GL LN CT GS VD WL GG VG WL VD GS CT LN GL SR SA CN O H PG CG PI N VE SV
GC SI RN RW BG RO LT LE BO WD FP RB OK PC WA FI C KM PM C FI WA PC OK RB FP WD BO RI TT RO BG RW RN SI GC
RV WE MD FS CO RA FO MS RP RU SS GR RT BA BD WR S NK DE S GU YA BA RT GR SS RU RP MS FO RA CO FS MD FG RV
L TS RR W DM ME LO BC HR FR ED CD FT FK RS LG G K CP G RG RS FK FT WO ED FR HR BC LO ME DM W RR WT L
Legend
AB - Angry boar B - Bishop BA - Running Bear BB - Blind Bear BC - Beast Cadet
BD - Buddhist Devil BE - Bear Soldier BG - Bishop General BI - Blind Dog BL - Blue Dragon
BM - Blind Monkey BN - Burning Soldier BO - Beast Officer BS - Boar Soldier BT - Blind Tiger
C - Copper General CA - Capricorn CC - Chinese Cock CD - Ceramic Dove CE - Cloud Eagle
CG - Chicken General CH - Chariot Soldier CI - Stone Chariot CK - Flying Cock CL - Cloud Dragon
CM - Climbing Monkey CN - Center Standard CO - Captive Officer CP - Crown Prince CR - Copper Chariot
CS - Cat Sword CT - Captive Cadet D - Dog DE - Drunken Elephant DG - Roaring Dog
DH - Dragon Horse DK - Dragon King DO - Donkey DM - Fire Demon DS - Dark Spirit
DV - Deva EA - Earth General EB - Enchanted Badger EC - Earth Chariot ED - Earth Dragon
EG - Fierce Eagle EL - Soaring Eagle ES - Eastern Barbarian EW - Evil Wolf F - Fire General
FC - Flying Cat FD - Flying Dragon FE - Free Eagle FG - Fragrant Elephant FH - Flying Horse
FI - Fire Dragon FK - Free King FL - Ferocious Leopard FO - Forest Demon FP - Free Pup
FR - Free Demon FS - Flying Swallow FT - Free Dream-Eater FY - Flying Goose G - Gold General
GB - Go Between GC - Gold Chariot GD - Great Dragon GE - Great Standard GG - Great General
GL - Golden Deer GM - Great Master GN - Wood General GO - Golden Bird GR - Great Dove
GS - Great Stag GT - Great Turtle GU - Guardian of the Gods H - Horse General HD - Howling Dog
HE - Ram’s-head Soldier HF - Horned Falcon HM - Hook Mover HO - Horseman HR - Running Horse
HS - Horse Soldier I - Iron General K- King KM - Kirin Master KR - Kirin
L - Lance LB - Longbow Soldier LC - Left Chariot LD - Lion Dog LE - Left Dragon
LG - Left General LH - Liberated Horse LI - Lion Hawk LL - Little Turtle LN - Lion
LO - Long-nosed Goblin LP - Leopard Soldier LS - Little Standard LT - Left Tiger M - Mountain General
MD - Mountain Dove ME - Mountain Eagle MF - Mountain Falcon MK - Side Monkey MS - Mountain Stag
MT - Center Master N - Knight NB - Northern Barbarian NK - Neighboring King NT – Violent wolf
O - Ox General OC - Oxcart OK - Old Kite OM - Old Monkey OR - Old Rat
OS - Ox Soldier OW - Swooping Owl OX - Flying Ox P - Pawn PC - Peacock
PG - Pup General PH - Phoenix PI - Pig General PM - Phoenix Master PR - Prancing Stag
PS - Poisonous Snake R - Rook RA - Rain Dragon RB - Rushing Bird RC - Right Chariot
RD - Reclining Dragon RE - River General RG - Right General RH - Running Chariot RI - Right Dragon
RM - Roc Master RN - Running Stag RO - Rook General RP - Running Pup RR - Running Rabbit
RS - Rear Standard RT - Running Tiger RU - Running Serpent RV - Reverse Chariot RW - Running Wolf
S - Silver General SA - Side Boar SB - Cross-bow Soldier SD - Front Standard SE - Sword Soldier
SF - Side Flier SG - Stone General SI - Side Dragon SL - Side Soldier SM - Side Mover
SN - Coiled Serpent SO - Soldier SP - Spear Soldier SQ - Square Mover SR - Silver Rabbit
SS - Side Serpent ST - Strutting Crow SU - Southern Barbarian SV - Silver Chariot SW - Swallow’s Wings
SX - Side Ox T - Tile General TC - Tile Chariot TF - Treacherous Fox TG - Savage Tiger
TS - Turtle-snake TT - Right Tiger VB - Violent Bear VD - Violent Dragon VE - Vertical Bear
VG - Vice General VH - Vertical Horse VI - Vermillion Sparrow VL - Vertical Leopard VM - Vertical Mover
VO - Violent Ox VP - Vertical Pup VR - Vertical Soldier VS - Violent Stag VT - Vertical Tiger
VW - Vertical Wolf W - Whale WA - Water Dragon WB - Water Buffalo WC - Wood Chariot
WD - Wind Dragon WE - White Elephant WF - Side Wolf WG - Water General WH - White Horse
WL - Woodland Demon WN - Wind General WO - Wooden Dove WR - Wrestler WS - Western Barbarian
WT - White Tiger YA - Yaksha      

Game play

The players alternate making a move, with Black moving first. (The traditional terms 'black' and 'white' are used to differentiate the sides during discussion of the game, but are no longer literally descriptive.) A move consists of moving a single piece on the board and potentially promoting that piece or displacing (capturing) an opposing piece.

Movement and capture

Most pieces in the game move in a unique manner. 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 (meaning another piece controlled by the moving player).

Each piece on the game moves in a characteristic pattern. Pieces move either orthogonally (that is, forward, backward, left, or right, in the direction of one of the arms of a plus sign, +), or diagonally (in the direction of one of the arms of a multiplication sign, ×). The lion, lion hawk 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. (The Buddhist spirit, teaching king, heavenly horse and furious fiend are similar, but they only appear as pieces promote.)

Categories of movement

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. (If a friendly piece occupies an adjacent square, the moving piece may not move in that direction; if an opposing piece is there, it may be displaced and captured.)

The step movers are the crown prince, generals (except: bishop, rook, pig, vice, great and wood), wolves, earth dragon, running horse, running rabbit, turtle snake, mountain dove, flying swallow, rain dragon, mountain stag, running pup, running serpent, side serpent, yaksha, Buddhist devil, violent stag, drunken elephant, neighboring king, chariots (except: reverse, running and copper), right tiger, left tiger, wind dragon, free pup, rushing bird, old kite, bears (except running), side boar, cloud eagle, flying cat, little standard, cloud dragon, soldiers (except soldier and chariot), violent ox, dark spirit, deva, howling dog, side mover, prancing stag, ferocious leopard, fierce eagle, poisonous snake, flying goose, strutting crow, blind dog, Chinese cock, phoenix, kirin, side ox, angry boar, liberated horse, flying cock, monkeys, barbarians, vermillion sparrow, swooping owl, old rat, cat sword, swallow’s wings, blind tiger, side flyer, coiled serpent, reclining dragon, go between, dog, vertical mover, vertical pup, vertical horse, dragon horse, dragon king and pawn.

Limited ranging pieces

Some pieces can move along a limited number (2 to 7) of free (empty) squares along a straight line in certain directions. Other than the limited distance, they move like ranging pieces (see below).

The limited ranging pieces are the king, standards, free dream-eater, wooden dove, dragons (except: rain, side, wind, cloud, flying and reclining), demons, beast cadet, mountain eagle, white tiger, ceramic dove, mountain dove, captive officer, mountain stag, side serpent, great dove, running tiger, running bear, yaksha, Buddhist devil, guardian of the Gods, wrestler, gold chariot, running stag, beast officer, free pup, rushing bird, old kite, peacock, phoenix master, kirin master, silver chariot, vertical bear, pig general, chicken general, horse general, ox general, silver rabbit, golden deer, captive cadet, great stag, stone chariot, cloud eagle, mountain falcon, vertical tiger, copper chariot, golden bird, prancing stag, water buffalo, fierce eagle, water general, mountain general, fire general, turtles, vertical wolf, donkey, enchanted badger, flying horse, angry boar, violent bear, liberated horse, barbarians, center master, roc master, horseman, soldiers (except: rook, ram’s-head, spear and sword), wing general, wind general, wood general, great master and roaring dog.

Jumping pieces

Several pieces can jump, that is, they can pass over any intervening piece, whether friend or foe, with no effect on either.

The jumping pieces are the wooden dove, running horse, mountain eagle, phoenix master, kirin master, knight, lion, great stag, vice general, flying cat, mountain falcon, golden bird, flying dragon, poisonous snake, phoenix, kirin, turtles, treacherous fox, center master, roc master, free eagle, lion hawk, great master, horned falcon, soaring eagle, roaring dog and lion dog.

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 standards, free king, free dream-eater, wooden dove, dragons (except: violent, flying and reclining), demons, running horse, mountain eagle, whale, running rabbit, tigers (except blind), turtle snake, ceramic dove, lance, oxcart, chariots, flying swallow, running pup, running serpent, great dove, running bear, running stag, running wolf, free pup, phoenix master, kirin master, vertical bear, side boar, silver rabbit, golden deer, great stag, cloud eagle, bishop, rook, side wolf, mountain falcon, soldiers (except: sword, burning and cross-bow), violent ox, golden bird, white horse, howling dog, side mover, water buffalo, turtles, vertical wolf, side ox, liberated horse, treacherous fox, roc master, vermillion sparrow, horseman, swallow’s wings, side flyer, great master, side monkey, vertical mover, flying ox, vertical pup, vertical horse, dragon horse, dragon king, horned falcon, soaring eagle, roaring dog and lion dog.

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 on 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 (unless it first changes direction to avoid it), and must stop when it captures, just like any other ranging piece. It can only change direction once per move.

Area movers

The lion and lion hawk may take multiple (2) steps in a single turn. These do not have to be in a line, so these pieces can potentially reach every square within two or three steps of the starting square, not just squares along one of the diagonals or orthogonals. Such moves are also useful to get around obstructions. An area mover must stop where it captures.

Limited range jumping pieces

The golden bird and several promoted pieces have the option of jumping a limited number of squares, and then continuing on in the same direction as a ranging piece.

Range jumping (flying) pieces

The ancient dragon may jump over any number of pieces, friend or foe, along a straight line, but only when making a capture. Otherwise it moves as a ranging piece.

Range capturing pieces

The great general, vice general, rook general, bishop general, violent dragon and flying crocodile may jump over any number of pieces, friend or foe, along a diagonal or orthogonal. They capture all pieces they jump.

However, they may only jump pieces of lower rank, whether friend or foe. The relevant ranking is:

  1. King, crown prince
  2. Great general
  3. Vice general
  4. Rook general, bishop general, violent dragon, flying crocodile

Individual pieces

King, fragrant elephant and white elephant

             
       
       
  ?  
       
       
             

Crown prince, left general and right general

         
   
  ?  
   
         

Gold general and violent wolf

         
   
  ?  
       
         

Rear standard

           
       
       
?
       
       
           

Free king

   
   
?
   
   

Free dream-eater

                   
                   
  ?  
                   
                   

Wooden dove

Note: in Japanese Wikipedia, the diagram shows the orthogonal limited range as being limited to two squares, but the verbal description gives a range of three.
                     
                     
                     
          ?          
                   
                   
      ? ? ?      
                   
                   
          ?          
                     
                     
                     

Earth dragon

The Japanese Wikipedia describes another set of movements for this piece.

             
         
       
      ?      
         
         
         

             
           
       
      ?      
       
         
         

Free demon

The Japanese Wikipedia describes another set of movements for this piece.

         
         
         
         
     
     
    ?
   
   
       
       
       
         

         
       
       
       
   
   
?
   
   
       
       
       
         

Running horse

       
       
       
      ?      
           
         
             

Beast cadet

             
       
       
  ?  
         
         
             

Long-nosed goblin (tengu)

Unlike in other shogi variants, in taikyoku the tengu cannot move orthogonally, and therefore can only reach half of the squares on the board. This is the move of the capricorn, and may be an error.

     
     
    ?    
     
     

Mountain eagle (right)

       
       
       
?
       
       
         

Mountain eagle (left)

       
       
       
?
       
       
         

Fire demon

It cannot burn other pieces as in tenjiku shogi.

         
       
       
?
       
       
         

Whale

       
       
    ?    
   
   

Running Rabbit

   
   
    ?    
   
         

White tiger

           
         
         
?
           
           
             

Turtle-snake

       
   
  ?  
   
       

Ceramic dove

         
       
       
  ?  
       
       
         

Lance, oxcart and savage tiger

       
       
    ?    
         
         

Reverse Chariot

       
       
    ?    
       
       

Mountain dove

                         
                     
                     
                     
                     
                     
          ?          
                       
                         
                         
                         
                         
                         

Flying swallow

     
     
    ?    
       
         

Captive officer

                 
             
           
           
    ?    
             
             
             
                 

Rain dragon

         
   
?
   
   

Forest demon

             
           
           
           
  ?  
               
               
               
               

Mountain stag

                 
                 
             
             
           
    ?    
               
               
               
               
                 

Running pup and running serpent

       
       
  ?  
       
       

Side serpent

         
       
       
       
?
       
         
         
         

Great dove

             
           
           
           
  ?  
           
           
           
             

Running tiger and running bear

           
           
  ?  
           
           

Yaksha

                 
             
  ?  
               
                 

Buddhist devil

                 
             
             
             
      ?      
               
                 
                 
                 

Guardian of the Gods

                 
               
               
               
  ?  
               
               
               
                 

Wrestler

                 
             
             
             
        ?        
             
             
             
                 

Silver general and violent stag

         
   
    ?    
     
         

Drunken elephant and neighboring king

         
   
  ?  
     
         

Gold chariot

           
       
  ?  
       
           

Side dragon

       
       
?
         
         

Running stag

         
     
     
?
       
       
         

Running wolf

     
   
?
         
         

Bishop general

     
     
    ?    
     
     

Rook general

       
       
?
       
       

Right tiger

       
     
?    
     
       

Left tiger

       
     
    ?
     
       

Right dragon

           
           
?  
           
           

Left dragon

           
           
  ?
           
           

Beast officer

                 
             
             
             
    ?    
             
             
             
                 

Wind dragon

     
     
?
     
       

Free pup

       
       
  ?  
       
           

Rushing bird

         
       
   
  ?  
     
         
         

Old kite (hawk)

             
         
         
    ?    
         
         
             

Peacock

         
         
     
    ?    
     
         
             

Water dragon

                   
                   
                   
               
               
?
               
               
               
               
                   

Fire dragon

                   
               
               
               
               
?
               
               
                   
                   
                   

Copper general

         
   
    ?    
       
         

Phoenix master

           
           
           
           
  ?  
           
           
           
           

Kirin master

           
           
           
           
  ?  
           
           
           
           

Silver chariot

           
       
       
      ?      
       
           
           

Vertical bear

           
           
           
  ?  
           
             
             

Knight

         
     
         
    ?    
         
         
         

Pig general

                     
                 
                 
                 
                 
          ?          
                   
                   
                     
                     
                     

Chicken general and pup general

         
       
       
       
       
    ?    
     
         
         
         
         

Horse general and ox general

         
       
       
   
    ?    
       
         
         
         

Center standard and front standard

               
           
           
           
?
           
           
           
               

Side boar

         
   
?
   
         

Silver rabbit

             
         
         
      ?      
         
         
         

Golden deer

         
         
         
      ?      
         
         
             

Lion

Or,
Note: The restrictions when capturing a lion in chu shogi do not apply in taikyoku shogi.

             
   
   
  ?  
   
   
             

             
   
  ! ! !  
  ! ? !  
  ! ! !  
   
             

Captive cadet

When it promotes to a captive officer (see above), it demotes (moving only two squares orthogonally instead of three).

                 
           
           
           
  ?  
             
             
             
                 

Great stag

           
       
           
?
       
       
           

Violent dragon

         
       
       
  ?  
       
       
         

Woodland demon

       
       
       
  ?  
           
           
           

Vice general

         
       
         
    ?    
         
       
         

Great general

   
   
?
   
   

Stone chariot

           
       
  ?  
           
           

Cloud eagle

               
           
           
           
      ?      
               
               
               
               

Bishop

Because it cannot move orthogonally, a bishop can only reach half the squares on the board.

     
     
    ?    
     
     

Rook, soldier, running chariot and square mover

       
       
?
       
       

Side wolf

         
       
?
       
         

Flying cat

                 
           
                 
                 
      ?      
           
                 
                 
                 

Mountain falcon

Note: This is the depiction of the diagram in Japanese wiki. However, the text makes no mention of an ability to move orthogonally sideways.

       
       
       
?
       
       
           

       
       
       
      ?      
       
       
           

Vertical tiger

       
       
       
    ?    
       
       
         

Little standard

           
       
       
?
       
           
           

Cloud dragon

     
   
  ?  
   
   

Copper chariot

               
           
           
           
        ?        
           
               
               
               

Ram’s-head soldier

     
     
    ?    
       
         

Violent ox

     
   
    ?    
       
         

Great dragon

         
       
   
   
    ?    
   
   
       
         

Golden bird

Dark spirit

Deva

Wood chariot

White horse

Howling dog (left and right)

Side mover

Prancing stag

Water buffalo

Ferocious leopard

Fierce eagle

Flying dragon

Poisonous snake

Flying goose

Strutting crow

Blind dog and Chinese cock

Water general and mountain general

Fire general

Phoenix

Kirin

Hook mover

Little turtle

Great turtle

Capricorn

Because the capricorn cannot move orthogonally, it can only reach half of the squares on the board.

Tile chariot

Vertical wolf

Side ox

Donkey and enchanted badger

Flying horse

Angry boar

Violent bear

Evil Wolf

Liberated horse

Flying cock

Old monkey

Northern barbarian and southern barbarian

Eastern barbarian and western barbarian

Treacherous fox

Center master

Roc master

Earth chariot

Vermilion sparrow

Blue dragon

Horseman

Swooping owl and old rat

Climbing monkey

Cat sword

Because it cannot move orthogonally, a cat sword can only reach half the squares on the board.

Swallow’s wings

Blind monkey

Blind tiger

Side flyer

Blind bear

Coiled serpent

Reclining dragon

Free eagle

Lion hawk

Chariot soldier

Side soldier

Vertical soldier

Wind general and river general

Horse soldier and ox soldier

Wood general

Earth general and go between

Boar soldier, leopard soldier and bear soldier

Stone general

Because it cannot move orthogonally or backward, a stone general can only reach less than half the squares on the board.

Tile general and sword soldier

Iron general and dog

Great standard

Great master

Right chariot

Left chariot

Side monkey

Vertical mover

Flying Ox

Longbow soldier

Vertical pup

Vertical horse

Burning soldier

Dragon horse

Dragon king

Horned falcon

Soaring eagle

Spear soldier

Vertical leopard

Cross-bow soldier

Roaring dog

Lion dog

Pawn

Promotion

Like other large board shogi variants, this game uses the promotion-by-capture rule. When a piece first makes a capture, it promotes. (If it can: a few important pieces do not promote.) Promotion has the effect of changing how a piece moves. See the table above for what each piece promotes to. Promotion is effected by turning the piece over after it moves, revealing the name of its promoted rank. Promotion is both compulsory and permanent.

This is all very different from smaller shogi variants, where pieces promote when they cross a promotion zone (the enemy camp), and where promotion is optional. The dots on the taikyoku 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 bishop promotes to a dragon horse. However, while a ferocious leopard promotes to a bishop on its first capturing move, it does not promote to a dragon horse on its second. Rather, it remains a bishop for the rest of the game. This is easily understood from the equipment, for each piece has only two sides.

If a Lance, oxcart, savage tiger, side dragon, running wolf, knight, angry boar, evil wolf, flying cock, wood general, stone general, iron general, dog, pawn, running leopard, free wolf or raiding falcon reaches the furthest rank; it must remain there until it captures or is captured.

Individual promoted pieces

New pieces that only appear as a result of promotion are as follows:

Free bird

Great dream-eater

Ancient dragon

Heavenly Tetrarch king

Great falcon

Great elephant

Fire ox and violent wind

Strong bear

Right phoenix

Running leopard

Thunder runner

Rain demon

Free boar

Free dog

Running ox

Great horse

Cavalier and strong chariot

Free fire

Burning chariot

Free stag and strong eagle

Free dragon and free tiger

Flying crocodile

Divine tiger

Divine dragon

Divine turtle

Divine sparrow

Free serpent and coiled dragon

Free wolf

Great tiger

Right dog

Left dog

Free bear, free leopard and great whale

Running boar

Heavenly horse

Spear general

Great leopard

Flying stag and copper elephant

Right army

Left army

Beast bird and captive bird

Gliding swallow

Buddhist spirit

Teaching king

Great shark

Furious fiend

Leopard king

Goose wing

Left iron chariot

Right iron chariot

Plodding ox

Wind snapping turtle

Running tile

Young bird

Playful cockatoo

Walking heron

Tiger soldier

Running dragon

Heavenly Tetrarch

Elephant king

Peaceful mountain

Chinese river

Free chicken

Free ox, free horse and free pig

Longbow general

Burning general

Cross-bow general

Mountain crane

Rushing boar

Sword general

Bird of paradise and multi general

Bear’s eyes and venomous wolf

Mountain witch

Flying falcon

Spirit turtle

Treasure turtle

Great bear

Wizard stork

Raiding falcon

Great eagle

Check and mate

When a player makes a move such that the opponent's sole remaining king or crown prince could be captured on the following move, the move is said to give check to the king or crown prince; the king or crown prince is said to be in check. If a player's last king or crown prince is in check and no legal move by that player will get the king or crown prince out of check, the checking move is also mate, and effectively wins the game.

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 (king or crown prince) 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 king or crown 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. (This rule may be relaxed in casual games.)

Another possible, if rather uncommon, way for a game to end is repetition (sennichite). 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 taikyoku shogi.

A typical example is P-12h. The first letter represents the piece moved (see above). Promoted pieces have a + added in front of the letter. (e.g., +CC for a wizard stork (promoted Chinese cock). 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 (as seen from Black's point of view) and 36jj being the bottom left corner. (This method of designating squares is based on Japanese convention, which, however, uses Japanese numerals instead of letters. For example, the square 2c is denoted by 2三 in Japanese.)

If a lion, golden bird, heavenly tetrarch king or teaching king 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, than it is added after the first capture.

If a move forces 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.

See also

External links

References

  1. Osaka University of Commerce: Amusement Industry Labo. "過去の展示情報 (Past exhibition information)". Retrieved 18 January 2013.