EuroShogi

EuroShogi is a shogi variant invented by Vladimír Pribylinec starting in 2000.[1] The game developed from an early version of chess variant Echos in 1977, leading to Cubic Chess, then later to Cubic Shogi, and finally to EuroShogi. Instead of the classic figures, 18 black and 18 black cubes are used, which are on two opposing sides without symbols. The other two cubes on the opposite sides have one white and one black symbol. The other opposing sides are the same symbols of the opposite color - their promotion is indicated by a circle around symbol. Symbol on top of its mobility. The pieces are placed on the board so that they are oriented towards players without any symbolic surfaces. Plays on a board with 8x8 fields of the same color.

EuroShogi
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8
8
77
66
55
44
33
22
11
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EuroShogi starting position. For this diagram, generals are represented by queens.
Designer(s)Vladimír Pribylinec
Genre(s)Abstract strategy game
Shogi variant
Players2
Setup time~1 min.
Playing timeCasual games usually 10–60 mins.
Random chanceNone
Skill(s) requiredStrategy, tactics

A major tenet of EuroShogi is simplification without radical changes, while maintaining good gameplay. The variant Heian shogi with playing board 8×8 or 9×8 is the only shogi variant somewhat similar to EuroShogi; other variants are larger or smaller, have new units, or lack drops.

Game rules

On the board the furthest three ranks from each player is their promotion zone. The starting setup is as shown. Pieces capture the same as they move.

Composition of pieces per player: 1 king, 1 tower, 2 bishops, 2 generals, 2 knights, 8 pawns.

Movement

King

The king steps one square in any direction, orthogonal or diagonal. The king does not promote.

Rook

The rook moves any number of unoccupied squares along any of the four orthogonal directions. Promoted rook is marked by the circle it moves as king too.

Before promotion
After promotion

Bishop

The bishop moves any number of unoccupied squares along any of the four diagonal directions. Promoted bishop is marked by the circle, it moves as king too.

Before promotion
After promotion

General

The general steps one square in one of the four orthogonal directions, or one square diagonally forward. (Six possibilities.) The general does not promote.

Light
Dark

Knight

The knight jumps at an angle intermediate to orthogonal and diagonal, equivalent to: one square frontal forward, then one square diagonally forward, in a single move. The knight leaps over any intervening men. The EuroShogi knight has an additional extension: it can also move one square horizontally to the side. Promoted knight is marked by the circle, it moves as general.

  • Before promotion:
Light
Dark
  • After promotion:
Light
Dark

Pawn

The pawn steps one square forward. Promoted pawn is marked by the circle, it moves as general.

Unpromoted pawn
Promoted pawn

Starting position

White: KD1 GC1 GE1 RG2 Bb2 BF1 NB1 NG1, pawns in the whole 3rd row
Black: KE8 GD8 Gf8 Rb7 BC8 BG7 NB8 NG8, pawns in the whole 6th row

Promotion

A player's promotion zone consists of the three farthest ranks. If a player's man crosses into its promotion zone, the player immediately promotes the man at the end of the turn. The king and general cannot promote. A pawn and the knight, after entering into the promotion zone instantly obtain a general movement by rotating its cube. After being dropped from the stack into the promotion zone they do not get promoted instantly, but they can be promoted when they move. A rook becomes a promoted rook, the bishop becomes a promoted bishop. A rook and a bishop dropped from the reservoir into the promotion zone are not promoted instantly, but they can be when they move (out of, or wholly within the zone).

Drops

Each player owns a stack for staging captured men, which are always stored not to promote. This is achieved by rotating a cube: captured unit changes a colour and loses a promotion. A player whose turn it is to move may either move a man on the chessboard, or drop any man from his stack on any vacant square, but a pawn may not be dropped on a file already containing a pawn of the same color. or on the last rank (there it can not move).

Check and checkmate

Check, checkmate, and draws follow the same conditions as in classical chess. However, it is not permitted to give perpetual check in EuroShogi.

  1. Repetition: If the same position occurs three times with the same player to move, then the game is a draw. (Recall, however, the prohibition against giving perpetual check.)
  2. Impasse: The game might reach an impasse if kings are advanced into their respective promotion zones and neither player has any hope of mating the other; or, if there is no chance of gaining any further material.
gollark: `sleep`'s sleep duration is actually interpreted in ticks internally.
gollark: You could just do something like `repeat sleep() until os.epoch "utc" > initial_utc_timestamp + length * 1000`.
gollark: Also, you can just stop it after n seconds, presumably.
gollark: The AI is very optimal. I've improved it slightly.
gollark: lescitronsnss.snsns.

See also

References
  1. Pritchard (2007), p. 260

Bibliography

  • Pritchard, D. B. (2007). Beasley, John (ed.). The Classified Encyclopedia of Chess Variants. John Beasley. p. 260. ISBN 978-0-9555168-0-1.CS1 maint: ref=harv (link)
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