Quoridor

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Quoridor
Quoridor 1.jpg
Players2-4
Age range8 and up
Setup time< 1 minute
Playing time20 minutes
Random chanceNone
Skill(s) requiredDeduction
 
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Quoridor
Quoridor 1.jpg
Players2-4
Age range8 and up
Setup time< 1 minute
Playing time20 minutes
Random chanceNone
Skill(s) requiredDeduction

Quoridor is a 2- or 4-player abstract strategy game designed by Mirko Marchesi and published by Gigamic Games. Quoridor received the Mensa Mind Game award in 1997 and the Game Of The Year in the USA, France, Canada and Belgium.[1]

Contents

Rules of the game

The starting position for a 4-player game. In a 2 player game, green and orange are omitted.
The wall A is legal. Wall B is illegal because it does not face two spaces on each side.

Quoridor is played on a game board of 81 square spaces (9x9). Each player is represented by a pawn which begins at the center space of one edge of the board (in a two-player game, the pawns begin opposite each other). The object is to be the first player to move their pawn to any space on the opposite side of the gameboard from which it begins.

The distinguishing characteristic of Quoridor is its twenty walls. Walls are flat two-space-wide pieces which can be placed in the groove that runs between the spaces. Walls block the path of all pawns, which must go around them. The walls are divided equally among the players at the start of the game, and once placed, cannot be moved or removed. On a turn, a player may either move their pawn, or, if possible, place a wall.

Pawns can be moved to an adjacent space (not diagonally), or, if adjacent to another pawn, jump over that pawn. If an adjacent pawn has a third pawn or a wall on the other side of it, the player may move to any space that is immediately adjacent to other adjacent pawns. The official rules are ambiguous concerning the edge of the board.

Walls can be placed directly between two spaces, in any groove not already occupied by a wall. However, a wall may not be placed which cuts off the only remaining path of any pawn to the side of the board it must reach.

History

Quoridor is also based on Mirko Marchesi's earlier game Blockade which was published in the 1970s. Marchesi also created another version of this game called Pinko Pallino was published in 1995 by Epta. Pinko Pallino was only for 2 players and was played on an 11×11 gameboard with a total of 42 walls and slightly different rules.[2]

Notation

Although there is no official notation, Lisa Glendenning's thesis[3] proposes a reasonable notation.

The notation proposed is similar to algebraic chess notation. Each square gets a unique letter-number designation. Columns are labeled a through i from player 1's left and rows are numbered 1 through 9 from player 2's side to player 1's side. A move is recorded as the column followed by the row as in e8. Player 1's pawn starts on e9 and player 2's pawn starts on e1.

Each pawn move is defined by the new square occupied by the pawn. For example, if player 1 moves from square e9 to e8, player 1’s move is e8.

Each fence move is defined by the square directly to the northwest of the wall from player 1's perspective, as well as an orientation designation. For example: a vertical wall between columns e and f and spanning rows 3 and 4 would be given the designation e3v.

Games are notated as they are in chess: by the move number, player 1's move, and player 2's move. For example, a game might start with each player moving their pawn towards the goal:

1. e8 e2

2. e7 e3

And then the players might add walls to lengthen the other player's path:

3. e7h e2h

and so forth.

Strategies

by this opening the first player provides two paths at the corners of the board for the other player while maintaining one easy path for themselves.

See also

References

  1. ^ Mensa Mind Games Winners Press Release
  2. ^ Pinko Pallino at BoardGameGeek
  3. ^ Lisa Glendenning (May 2005). Mastering Quoridor (B.Sc. thesis). University of New Mexico. http://hyperion.cs.washington.edu/attachments/15/glendenning_ugrad_thesis.pdf. 

External links

Papers on implementing Quoridor-playing algorithms