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Claude Shannon. The Shannon number, named after the American mathematician Claude Shannon, is a conservative lower bound of the game-tree complexity of chess of 10 120, based on an average of about 10 3 possibilities for a pair of moves consisting of a move for White followed by a move for Black, and a typical game lasting about 40 such pairs of moves.
In the center are the two openings included in the volume: 1.d4 Nf6 2.c4 e6; and 1.d4 Nf6 2.c4 g6 without (symbol ┘) an early ...d7–d5. The Encyclopaedia of Chess Openings (ECO) is a reference work describing the state of opening theory in chess, originally published in five volumes from 1974 to 1979 by the Yugoslavian company Šahovski ...
1. One of the chessmen or figures used to play the game – that is, a king, queen, rook, bishop, knight or pawn. Each piece type has its own rules of movement on the board and of capturing enemy pieces. This is the definition used in the context of rules of chess – for example, the touched piece rule. 2.
1883: Johannes Zukertort vs Joseph Henry Blackburne, London [16] 1889: Emanuel Lasker vs Johann Hermann Bauer, Amsterdam. This game between Emanuel Lasker and Johann Hermann Bauer was the first famous example of the double bishop sacrifice. [17] 1895: Harry Nelson Pillsbury vs Siegbert Tarrasch, Hastings.
University of Salamanca. Occupation (s) Author, chess player. Known for. Lucena position. Luis Ramírez de Lucena (c. 1465 – c. 1530) was a Spanish chess player who published the first extant chess book. He is believed to be the son of humanist writer and diplomat Juan de Lucena. [1]
In Anastasia's mate, a knight and rook team up to trap the opposing king between the side of the board on one side and a friendly piece on the other. Often, the queen is first sacrificed along the a-file or h-file to achieve the position.
Chess opening theory table. A chess opening theory table or ECO table (Encyclopaedia of Chess Openings) presents lines of moves, typically (but not always) from the starting position. Notated chess moves are presented in the table from left to right. Variations on a given line are given horizontally below the parent line.
The Four Knights Game is a chess opening that begins with the moves: 1. e4 e5. 2. Nf3 Nc6. 3. Nc3 Nf6. This is the most common sequence, but the knights may develop in any order to reach the same position. The opening is fairly popular with beginners who strictly adhere to the opening principle: "Develop knights before bishops."
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