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G

Gambit: An opening maneuver in which at least a pawn is offered in return for a strong position, a chance to attack or gaining tempo which permits development.

Game of the century: Widely-used, descriptive term for the Fischer-Byrne game (a Grünfeld Defense) in the 1956 Rosenwald tournament. Fischer, 13 year's old at the time, mated IM Byrne using a Queen and Rook sacrifice. Kmoch used the term "Game of the Century" in his Chess Life article to refer narrowly to Chess played by youngsters .

Gelbfuhs Score: Tie-breaking system applicable to tournaments where players do not all play the same number of rounds. An individual's Gelbfuhs Score equals the sum of scores of the players beaten, divided by the number of games played; plus one-half the sum of scores of players with whom draws were scored, divided by the number of games played. The Gebfuhs Score is equal to the Sonneborn-Berger score when all players play the same number of games.

Gens una sumus: Latin for " We are one family or We are one race ". The official motto of FIDE.

GM: Abbreviation for International Grandmaster.

GMA: The ill-fated Grandmasters Association (GMA) under Kok’s chairmanship showed how Chess should be organised with a professional circuit that hosted the memorable World Cup series under the tournament directorship of Lubos Kavalek.

Good Bishop: A Bishop free to operate without interference from its own Pawns and thus is very mobile. Such Bishop is very active because it is positioned on a square of the opposite colour to the squares on which most of its Pawns are stationed.

Göttingen Manuscript: A Latin document of 33 pages containing analysis of openings and Chess problems. Housed in the University of Göttingen Library, it is believed to have been written by Lucena, circa 1500.

Grading: A numerical representation of the strength of a Chess player based upon his results in games against other graded players. In the US, the term rating is used in place of grading.

Grandmaster: A title awarded by FIDE to players who meet an established set of performance standards, including a high Elo rating. It is the highest title (other than World Champion) attainable in Chess. Once earned, a Grandmaster title cannot be taken away.

Great Bare King: Type of win where the victor checkmates the opponent on the same move that also leaves the loser with a bare King.

Guéridon: French for pedestal table. A position where a checkmated King has two defenders on diagonally adjacent squares and is attacked by the enemy queen which sits on an immediately adjacent square.