eXtreme Gammon is backgammon software written by Xavier Dufaure de Citres and released in 2009. [1] It is available for Microsoft Windows and mobile platforms.
According to the Financial Times , the program is the best backgammon player in the world, and the near-exclusive study tool for all serious backgammon players. [1]
eXtreme Gammon provides a widely accepted benchmark number for players' skills called the Performance Rating or PR, with a lower number indicating a better rating. PR is the average equity lost per decision multiplied by 500. Only decisions not considered to be "obvious" are counted. [1] [2]
PR | Description | ELO equalivent |
0.0-2.5 | World Champ | 2162-2240 |
2.5-5.0 | World Class | 2077-2162 |
5.0-7.5 | Expert | 1986-2077 |
7.5-12.5 | Advanced | 1792-1986 |
12.5-17.5 | Intermediate | 1593-1792 |
17.5-22.5 | Casual Player | 1405-1593 |
22.5-30.0 | Beginner | 1167-1405 |
30.0 or more | Casual Player | 1167 or less |
Backgammon is a two-player board game played with counters and dice on tables boards. It is the most widespread Western member of the large family of tables games, whose ancestors date back nearly 5,000 years to the regions of Mesopotamia and Persia. The earliest record of backgammon itself dates to 17th-century England, being descended from the 16th-century game of Irish.
The Elo rating system is a method for calculating the relative skill levels of players in zero-sum games such as chess or esports. It is named after its creator Arpad Elo, a Hungarian-American physics professor.
Tables games are a class of board game that includes backgammon and which are played on a tables board, typically with two rows of 12 vertical markings called points. Players roll dice to determine the movement of pieces. Tables games are among the oldest known board games, and many different varieties are played throughout the world. They are called 'tables' games because the boards consist of four quadrants or 'tables'. The vast majority are race games, the tables board representing a linear race track with start and finish points, the aim being to be first to the finish line, but the characteristic features that distinguish tables games from other race games are that they are two-player games using a large number of pieces, usually fifteen per player.
Gammon may refer to:
24 (twenty-four) is the natural number following 23 and preceding 25. It is one sixth of a gross.
Hypergammon is a variant of backgammon.
The First Internet Backgammon Server (FIBS) began operating on July 19, 1992, allowing users to play backgammon in real-time against other people. It was hosted on the Internet, and could track player performance using a modified version of the Elo rating system.
MSN Games is a casual gaming web site, with single player, multiplayer, PC download, and social casino video games. Games are available in free online, trial, and full feature pay-to-play versions.
Tavla is a Turkish tables game. It often refers to the western game of Backgammon and to tables games in general. However, it also refers to the more traditional game described here. Note that Turkish sources may refer to western Backgammon as "Modern Tavla" to distinguish it. The Persian name for the game is Takhteh or Takhte.
The backgammon chouette is a variant of backgammon for three or more players. Traditionally played in person, today, the internet allows this form of backgammon to be played across different countries and various platforms. The chouette is a fast-paced game, featuring frequent use of the doubling cube, discussion and dispute of possible moves, and shifting rivalries among players.
The first moves of a backgammon game are the opening moves, collectively referred to as the opening, and studied in the backgammon opening theory. Backgammon opening theory is not developed in as much detail as opening theory in chess, which has been widely studied. This is because following the first move in backgammon, there are 21 dice roll outcomes on each subsequent move and many alternative plays for each outcome. Therefore, the tree of possible positions in backgammon expands much more rapidly than in chess; by the third roll there are about 25,000 different possibilities.
William Gerard (Bill) Robertie is a backgammon, chess, and poker player, author and teacher. He is one of several backgammon players to have won the World Backgammon Championship twice. Besides the World Championship wins in Monte Carlo, Robertie's major tournament victories include Boston, Las Vegas, the New York Metro Open, the Bahamas Pro-Am (1993), Istanbul (1994) and the Isle of Man Super-Jackpot (1984). In chess, Robertie won the 1970 U.S. Speed Chess Championship.
Tim Holland was a world-champion backgammon player, highly paid teacher of the game, author of four backgammon books and successful gambler who has won more major backgammon tournaments than almost anyone in history.
TD-Gammon is a computer backgammon program developed in 1992 by Gerald Tesauro at IBM's Thomas J. Watson Research Center. Its name comes from the fact that it is an artificial neural net trained by a form of temporal-difference learning, specifically TD-Lambda.
Neurogammon is a computer backgammon program written by Gerald Tesauro at IBM's Thomas J. Watson Research Center. It was the first viable computer backgammon program implemented as a neural net, and set a new standard in computer backgammon play. It won the 1st Computer Olympiad in London in 1989, handily defeating all opponents. Its level of play was that of an intermediate-level human player.
Prince Alexis Obolensky Jr. was a Russian-American socialite, real estate broker, and backgammon player, and sometimes called the "father of modern backgammon". He was a member of the princely Obolensky family of the Rurik Dynasty.
In backgammon, there are a number of strategies that are distinct to match play as opposed to money play. These differences are most apparent when a player is within a few points of winning the match.
Paul Adrian Lamford is a Welsh gaming and gambling expert, author, publisher and company director. He is a three-time Welsh chess champion, 1993 and 2001 British backgammon champion, and a Grandmaster at bridge and a poker player. During the 1990s he was editor of Games & Puzzles magazine and has been editor of Chess magazine and Bridge magazine. He appeared several times on Radio 4's Puzzle Panel.
The following is a glossary of terms used in tables games, essentially games played on a Backgammon-type board. Terms in this glossary should not be game-specific, but applicable to a range of tables games.
Irish or the Irish Game was an Anglo-Scottish tables game for two players that was popular from the 16th to the mid-18th centuries before being superseded by its derivative, the "faster paced" backgammon. In its day, Irish was "esteemed among the best games at Tables." Its name notwithstanding, Irish was one of the most international forms of tables games, the equivalent of French toutes tables, Italian tavole reale and Spanish todas tablas, the latter name first being used in the 1283 El Libro de los Juegos, a translation of Arabic manuscripts by the Toledo School of Translators.