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Abalone (board game)
Abalone Boardgame
Players 2 (or more)
Age range 6+
Setup time 20-60 seconds
Playing time 10 minutes-2 hours
Random chance None
Skills required Strategy and tactics

Abalone is an award winning[1] two-player strategy board game designed by Michel Lalet and Laurent Levi[1] in which each player is represented by marbles of opposing colors. The objective is to push six of the opponent's marbles off the edge of the board.

GameplayEdit

RulesEdit

File:Abalone standard.svg
File:Abalone broadside.svg
File:Abalone inline.svg

The board consists of 61 circular spaces arranged in a hexagon, five on a side. Each player has 14 marbles that rest in the spaces and are initially arranged as shown at left. Play alternates between the players one move at a time, with the black marbles moving first. For each move, a player moves a line of one, two or three one space. The move can be either in-line (parallel to the line of marbles) or broadside (not parallel to the line of marbles), as illustrated at right.[2]

A player can push their opponent′s marbles which are in an adjacent space to their own with an in-line move only. They can only push if the pushing line has more marbles than the pushed line (three can push two or one; two can push one). Marbles must be pushed into an open space (i.e. not blocked by a marble of either colour). The winner is the first player to push six of the opponent's marbles off of the edge of the board.[3]

Move notationEdit

The notation for recording moves gives the letters A-I to the horizontal lines, and the numbers 1-9 to northwest-southeast diagonals.[4]


     I O O O O O
    H O O O O O O
   G + + O O O + +
  F + + + + + + + +
 E + + + + + + + + +
  D + + + + + + + + 9
   C + + @ @ @ + + 8
    B @ @ @ @ @ @ 7
     A @ @ @ @ @ 6
        1 2 3 4 5

A popular notation: An inline move can be denoted by the movement of the trailing marble. Broadside moves can be denoted by the initial positions of the two extremities of the row followed by the final position of the first one (thus, with this notation, each broadside move has two notations possible, which could be avoided).

Avoiding drawsEdit

File:Abalone defense.svg

The dynamics of the basic game may have one serious flaw: it seems that a good, conservative player can set up his or her marbles in a defensive wedge, and ward off all attacks indefinitely. An attacker may try to outflank this wedge, or lure it into traps, but such advances are often more dangerous to the attacker than the defender. Thus, from the starting position, it takes little skill and no imagination to avoid losing, and nothing in the rules prevents games from being interminable.

Because it is boring for games to be drawn out indefinitely, serious Abalone players tacitly agree to play aggressively. A player who forms a defensive wedge and makes no attempt to attack is therefore likely to be a novice who might lose anyway. Nevertheless, the possibility of any competent player bringing the game to a standstill, and successfully avoiding losing to even a championship-calibre player, remains troubling.

There are several possible solutions to this conundrum. First, in tournaments, a judge may penalize a player for playing defensively. This solution is somewhat unsatisfactory, given that a judge may not always be present, and that "defensive play" is a subjective notion.

Second, several variations of the rules of play have been developed for the same board and marbles. None of the variations has the same appealing simplicity of the original.

File:Abalone german.svg
File:Abalone belgian.svg

The third, and perhaps best, alternative starting positions have been designed to make the formation of stalemate wedges less likely. Experiments are still underway to find an opening position, which neither devolves into a draw nor gives too great an advantage to the first player. One popular attempt is the Marguerite (daisy) positions, two versions of which are displayed on the left and on the right.

Rule variationsEdit

Abalone can be played by three people (or more) using the same board with fewer marbles, each in three different colours.

A number of two-player variations use a third colour for passive pieces, for example variation The Pillar (with a fixed marble in the centre of the board), which has been examined to some depth by Alex Borello and Nicolas Le Gal. Another possible variation involves either player winning the game if he ejects the central marble. A few variations use a second layer of marbles.

StrategyEdit

Forums of Abalone communities have found that generally[5]:

  • Keep the marbles close to the centre of the board and force the opponent to move to the edges
  • Keep the marbles close together for increased defense and attack, especially in a hexagon shape to be able to push or defend in any direction
  • Pushing the opponent off the board is not usually a good idea if it leads to weaknesses in the player’s geometry

HistoryEdit

OriginsEdit

Abalone was invented in 1987 by Laurent Levi and Michel Lalet. In 1999, a number of top players from the Mind Sport Olympic signed an agreement to use a different starting position (the Belgian daisy) to revitalize the game. This has been used for top tournaments since then, including the AbaCup.

ChampionsEdit

No official world championships have been held; the only international tournament is the Mind Sports Olympiad.[6]

  • 1997: French Marc Tastet (France)
  • 1998: Czech Vojtěch Hrabal (Czech Republic)
  • 1999: Austrian Gert Schnider (Austria)
  • 2000: Austrian Gert Schnider (Austria)
  • 2001: German Thomas Fenner (Germany)
  • 2002: Czech Jan Šťastna (Czech Republic)
  • 2003: French Stephane Nicolet (France)
  • 2004: French Alex Borello (France)
  • 2005: British David M. Pearce (United Kingdom)
  • 2006: Czech Jan Šťastna (Czech Republic)
  • 2007: French Vincent Frochot (France)
  • 2008: Czech Jan Šťastna (Czech Republic)
  • 2009: British David M. Pearce (United Kingdom)
  • 2010: French Vincent Frochot (France)
  • 2011: French Vincent Frochot (France)

Gert Schnider and Thomas Fenner participated in the evaluation and adjustment of Aba-Pro. Marc Tastet was the 1992 World Othello Champion, Stephane Nicolet is a two-time World Othello Championship finalist, and Jan Stastna is a strong Othello player.

ReferencesEdit

  1. 1.0 1.1 List of past winners http://www.ludotheque.com/article.php3?id_article=75 Retrieved 27 April 11
  2. O. Aichholzer, F. Aurenhammer, and T. Werner. Algorithmic fun - Abalone. Special Issue on Foundations of Information Processing of TELEMATIK, 1:4-6, 2002. [www.ist.tugraz.at/staff/aichholzer/.../rp/abalone/tele1-02_aich-abalone.pdf] Retrieved 27 April 2011
  3. N Lemmens, Constructing an Abalone Game-Playing Agent, Bachelor Conference Knowledge Engineering, 2005. [1] Retrieved 27 April 11
  4. Pascal Chorus, Implementing a Computer Player for Abalone using Alpha-Beta and Monte-Carlo Search (2009) [2] Retrieved 27 April 2011
  5. Ozcan,E. and Hulagu,B. (2004). "A simple intelligent agent for playing abalone game: Abla". Proceedings of the 13th Turkish Symposium on Artificial In-telligence and Neural Networks: 281–290. 
  6. Mind Sports Olympiad Abalone Results http://www.boardability.com/result.php?id=abalone 06 september 2010

External linksEdit

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