Gigachess

Giga-échecs

Even bigger ! This is a chess variant with 25 different pieces on a 14 x 14 board: such a board was used by some Maharajas in ancient India. There are 196 squares and 48 pieces per side which gives almost the same density than for Orthodox Chess.

In Gigachess one will find again the chessmen encountered in Shako , Tamerlane 2000, Metamachy. Zanzibar, and Teramachy.

The first Gigachess has been designed in 2001 and found a certain success:

• It has been included in the second version of Jocly, which is now no more supported, but it remains possible to play it on this link (Thanks to Ed Trice).
• It got a page in the chessvariants.com website where a preset has been written which allows on-line games between players.
• In 2013, the rule for promotion of short-range pieces had been implemented.

If you come here for this 2001/2013 version, you will find it at the bottom of this page.

In 2020, Gigachess has evolved to Gigachess II in order to be consistent with my other chess variants. Several changes have been made. The Corporal and the Ship are no more used. On the opposite other pieces which are found in my smaller large chess have been added. The full line-up has been re-optimized again in 2022.

• Gigachess II
• Gigachess I (archive)
• Commentaires

The board is a 14 x 14 checkered squares with a white one at the right end of each player.

There are 48 pieces per side.

Set-up

The pieces are:

• 1 Amazon, 1 Sorceress, 1 Marshall, 1 Cardinal, 1 Rhinoceros, 1 Buffalo, 2 Crocodiles, 2 Giraffes, 2 Camels and 2 Cannons on 1st row,
• 1 King, 1 Queen, 1 Duchess, 1 Centaur, 2 Machines, 2 Bishops, 2 Knights, 2 Rooks and 2 Elephants on 2nd row,
• 1 Lion, 1 Eagle, 1 Missionary, 1 Admiral, and 2 Princes on 3nd row,
• 14 Pawns on 3rd and 4th rows.

The white King is placed on the center of the second row on a black square, the black King being on a white square. The Queen is also placed on the center, beside the King.

Gigachess-II

Moves And Captures

• King: as in Metamachy, i.e. moves as in usual Chess with no castling but initial King's jump.

• Queen:she moves exactly as in usual Chess.

• Bishop:he moves exactly as in usual Chess.

• Knight: he moves exactly as in usual Chess and is promoted to a Buffalo on the last row.

• Rook:it moves exactly as in usual Chess, except there is no castling at Gigachess.

• Pawn:it moves as in Metamachy, not as is usual Chess. It can move straight forward one or two square from any position on the board, without capturing. It captures one square diagonally forward. When it reaches the last row it promotes to a Queen, and nothing else.

• Prince: as in Metamachy. He moves and captures one square in any direction like a King, but without being hindered by check. Like the Pawn, he can also move without capturing to the second square straight ahead from any position on the board. When he reaches the last row it promotes to an Amazon, and nothing else.

• Elephant: as in Shako and Metamachy. It moves one or two squares diagonally. When an Elephant moves two squares, no matter what intermediate squares contain. Note that it always stays on the same color of square. When it reaches the last row it promotes to a Lion.

 

• Camel: as in Metamachy. It jumps to the opposite square of a 2x4 rectangle, like an extended Knight. No matter what intermediate squares contain. It is also described as a (3,1) leaper. Note that it always stays on the same color of square. When it reaches the last row it promotes to a Buffalo.

 

• Giraffe:as in Zanzibar. It jumps to the opposite square of a 3x4 rectangle, like an extended Knight. No matter what intermediate squares contain. It is also described as a (3,2) leaper. Note that it always changes the same color of its square. Under the name of Zebra, it is also a fairy piece used by problemists for compositions. When it reaches the last row it promotes to a Buffalo.

 

• Machine: as in Zanzibar. It as it moves one or two squares on the rows or the columns. When an Elephant moves two squares, no matter what intermediate squares contain. When it reaches the last row it promotes to a Lion.

 

• Cannon:exactly as in in Xiangqi. Also in Shako and Metamachy. It moves without taking like a Rook, but it takes by going in a straight horizontal and vertical line and jumping over exactly one piece. When a Cannon takes a piece, there must be exactly one piece between the original and final square of the Cannon's move - this piece may be of either color.

• Lion: exactly as in Metamachy. It moves as a King (a single step move in any direction), or may jump to a position two squares away, jumping in any orthogonal or diagonal direction, or jumping as a Knight.

• Eagle: exactly as in Metamachy. It moves one square diagonally and then, slides away of an indefinite number of squares vertically or horizontally. It is authorized to go only one square diagonal. It can not jump and the unobstructed path must start with the diagonal movement.

• Rhinoceros:as in Zanzibar. It moves one square vertically or horizontally and then, slides away of an indefinite number of squares diagonally. It is authorized to go only one square in line or column. It can not jump and the unobstructed path must start with the orthogonal movement. It is a counterpart of the Eagle.

• Buffalo: as in Zanzibar. It combines the leaps of the Knight (2,1 leaper), the Camel (3,1 leaper) and the Giraffe (3,2 leaper).

• Crocodile: as in Zanzibar. It is the diagonal counterpart of the Chinese Cannon. It moves like a Bishop and needs an intermediate piece between itself and its victim to capture it. The Crocodile jumps the intermediate and takes the victim on its square. The intermediate is left unaffected. Also known as Vao by problemists.

• Marshall:it combines the move of Rook and Knight.

• Cardinal: it combines the move of Bishop and Knight.

• Amazon: it combines the move of Queen and Knight. An old idea, used by Russians instead of the Queen in the 18th century.

• Centaur: it is another compound piece that moves as a Knight or a non-royal King. Being a short-range piece, it promotes to a Lion when it reaches the last row.

• Admiral: it is another compound piece that moves as a Rook or a non-royal King. That means that it is a Rook that can also step one space diagonally. It corresponds to the Dragon King that is found in Shogi.

• Missionary: it is another compound piece that moves as a Bishop or a non-royal King. That means that it is a Bishop that can also step one space orthogonally. It corresponds to the Dragon Horse that is found in Shogi.

• Sorceress: it moves like a Queen and needs an intermediate piece between itself and its victim to capture it. The Sorceress jumps the intermediate and takes the victim on its square. The intermediate is left unaffected. Like the Queen is Bishop + Rook, the Sorceress is Cannon + Crocodile. As in  Zanzibar.

• Duchess: it moves as a limited Queen, one, two or three squares in any straight directions. When moving two or three squares, it may jump and it does not matter what intermediate squares contain. As in  Zanzibar.

Promotions:

In Gigachess, Pawns and also Princes, Centaurs, Elephants, Machines, Knights, Camels, Giraffes are promoted when they get to the opposite side, at the last rank of the board (on their last row).

Promotion is compulsory and cannot be refused. 

Piece	promotion to

Castling: there is no castling in Gigachess.

End Of Game: Victory is obtained when the opposite King is checkmated. All other types of endgame (pat, perpetual check,...) are classic.

Set-up

Gigachess-I (now obsolete)

Some of the pieces that were used for Gigachess-I have been given a new name in Gigachess-II in order to cope with a consistent system along with the other chessvariants of this author.

• originally the Eagle was called a Gryphon. This piece's move remains the same.

• originally the Crocodile was called a Bow or a Crosbow. This piece's move remains the same.

In addition, Gigachess-I had two pieces that have been withdrawn in Gigachess-II:

• Corporal: an extended Pawn. He can advance one or two square from any position on the board and its capturing move is one square diagonally forward. The improvement is that the Corporal can also advance 1 step diagonally forward. (So, with or without capturing). The Corporal can take en-passant every time an opposite Pawn or Corporal or Prince has advanced two squares. Promotes to Queen on last row.

• Ship: originally invented for Tamerlane 2000, it moves one square diagonally and then, goes away of an indefinite number of squares vertically, never horizontally. It can move one square diagonally only. It can not jump and must begin its move with the diagonal step. The Ship is more limited than the Eagle (which can move horizontally). When the Ship reaches the last row it promotes to an Eagle.

• Troll: jumps 3 steps orthogonally or diagonally. No matter what intermediate squares contain. In addition, it moves and captures like a Pawn. This permits the Troll to reach any square on the board. No e.p. It promotes to a Queen if it reaches the back row of the opponent with a "Pawn" move, i.e. not by jumping. It does not promote by reaching the opponent's back row with a jump.

• Squirrel: also a compound piece that jumps as a Knight or jumps at 2 squares, diagonally (a move called Alfil) or orthogonally (a move called Dabbaba). It promotes to a Lion when it reaches the last row.

Find Gigachess in the Chess Variant Pages.

There is a preset to play it there.

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Pieces Value

The relative pieces' value can be estimated as follows, normalized to 5 for the Rook :

Pawn: 0.75, Giraffe: 2, Camel: 2.25, Elephant: 2.5, Knight: 2.5,  Crocodile: 2.5, Machine: 2.75, Prince: 3, Bishop: 3.5, Cannon: 3.5, Rook: 5, Missionary: 5.5, Centaur: 5.75, Sorceress: 6.5, Cardinal: 6.75, Admiral; 6.75, Rhinoceros: 7.5, Buffalo: 8, Marshall: 8.25, Duchess: 8.75, Lion: 9, Eagle: 9, Queen: 9.75, Amazon: 14

These values are just given for a very rough estimate. A lot of players would disagree and give less or more points to several piece. Never mind, make your own scale.

Commentaires

"Giga" c'est vraiment très grand. D'accord, on n'utilise pas ici un milliard de pièces ni même un milliard de cases, mais ce jeu d'échecs est quand même géant. L'échiquier présente 14 x 14 cases et il y a 48 pièces par joueur.

Il y a 25 types de pièces différents: les 6 classiques et 18 nouvelles choisies parmi les meilleures des meilleures variantes échiquéennes comme la redoutable Amazone.
Il n'y a pas que les puissants qui comptent et à côté du modeste Pion classique on trouve aussi des pièces à portée limitée qui peuvent prétendre à une promotion. Toutes ces nouvelles pièces sont faciles à se remémorer et ne posent aucun problème au joueur classique qui voudra s'amuser.

La densité (nombre de pièces / nombre de cases) est de pratiquement 1/2 comme pour les échecs orthodoxes.